Weed management guide by Farm Business Communications

Weed Management Guide

CORN SOYBEANS Cereals

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Weed Management Guide CORN | SOYBEANS | Cereals I put this weed management guide together for Country Guide because I have noticed a change in some of the weed species commonly found in corn, soybean and cereal fields. There has also been a tremendous amount of research conducted by the University of Guelph (specifically, Dr. Peter Sikkema, University of Guelph – Ridgetown Campus) that sheds light on how to manage certain “problem weeds.” The presence of problem weeds, herbicide-resistant weeds (specifically glyphosate) and the entry of new herbicide-tolerant crop technologies makes it more challenging to select products for your farm operation. It was clear to me that it was time to change the way that we present weed management information to you. This insert provides an opportunity to construct weed control rating charts that better reflect the types of weed management challenges found in field crops throughout the season. Is it perfect? Probably not, but that is the goal, to make it a perfect resource for you. I would value any constructive suggestions that you have.

Mike Cowbrough Weed Management Program Lead, Field Crops Ministry of Agriculture and Food, Ministry of Rural Affairs 519-824-4120 Ext. 52580

SPECIAL SUPPLEMENT Weed Management Guide 2017

The right decisions Great performance in the field is more essential than ever, and more achievable. Thanks to Mike Cowbrough’s expert insights in the following pages, your process for making the right weed control decisions just got a lot easier by tom button I wrote in this space last year that opportunity doesn’t mean what it used to mean. It’s a message I want to repeat, because this change is a good thing. In yesterday’s low-volatility environment, opportunity used to be driven by production fundamentals. How many acres have been planted? How dry is Illinois? How many cattle are on feed? Such factors created a price range, with commodities trading between highs and lows that seemed to make sense. Today’s markets by contrast are tossed about by global economic policy, by the shakiest speculation about weather, and by the whims of investors. But farmers too are contributing to the volatility by taking much more control of their pricing with faster, more sophisticated marketing tools. That, as I say, is a good thing, because if a farm is going to thrive, it must create and exploit its own wins. Waiting for opportunity doesn’t build long-term competitiveness. But, of course, the shrewdest business model is nothing without bushels in the field, produced cost-effectively and within a manageable level of risk. That’s why we are again pleased to bring you OMAFRA weed expert Mike Cowbrough’s ratings to help you select the optimum herbicide treatments for your farm. As you know, Mike’s recommendations are practical and farm-based. In today’s world, they’re an opportunity.

Tom Button, Editor, Country Guide tom.button@fbcpublishing.com 4

Weed Management Guide 2017

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Weed Management Guide

CONENTS

corn Table 1....................8 Weed control ratings for pre-plant burndown treatments in corn

Table 2...................8

Weed control ratings for pre-emergent herbicide treatments in corn

Table 3.................10 Emerged annual grass and broadleaf weed control ratings for post-emergent herbicides in corn

Table 4................. 12 Emerged perennial weed and volunteer crop control ratings for post-emergent herbicides in corn

Weed Management Guide 2017

SOybean

cereal

Table 1..................14

Table 1..................18

Table 2.................14

Table 2.................18

Weed control ratings for pre-plant burndown treatments in soybeans

Weed control ratings for pre-emergent herbicide treatments in soybeans

Table 3.................16 Emerged annual grass and broadleaf weed control ratings for post-emergent herbicides in soybeans

Weed control ratings for pre-plant burndown treatments in cereals Emerged annual grass and broadleaf weed control ratings for post-emergent herbicides in cereals

Table 4.................16 Emerged perennial weed and volunteer crop control ratings for post-emergent herbicides in soybeans

Weed Management Guide 2017

Table 1. Weed control ratings for pre-plant burndown treatments in corn

Canola, volunteer (RR)

Carrot, wild

Chickweed

Clover, red

Dandelion

Fleabane, Canada

9 9 9

Broadleaf plantain

7 9 9

Burdock (2nd year)

7 8 9

Burcucumber

9 9 9

Buckwheat, wild

Witchgrass

9 9 9

Atriplex, spreading

Sandbur

9 9 9

Alfalfa, volunteer

Quackgrass

9 9 9

Azuki bean, volunteer

Foxtails

Bluegrass, annual

Tolerant hybrids

Herbicide Treatment

Mode of action

Weed species typically found at time of burndown

<5 6 8

6 9 9

0 0 0

7 8 9

9 9 9

7 8 9

7 9 9

9R 9R 9R

Glyphosate: Emerged weed control ratings at 4 weeks after application Glyphosate (1X rate) Glyphosate (2X rate) Glyphosate (3X rate)

9 9 9

All All All

9 9 9

7 8

Tank-mix partners with glyphosate (1X rate): Weed control ratings at 8 weeks after application – in other words “If I add a herbicide to glyphosate, will it improve 2,4-D ester 700 Aatrex 480 Banvel II, Hawkeye or Oracle + 2,4-D Banvel II, Hawkeye or Oracle + Aatrex 480 Battalion Co-pack (Elim EP + Dual II Magnum + Banvel II) Broadstrike RC Callisto + Aatrex 480 Converge XT Co-pack (Converge Flexx + Converge 480) Eragon + Merge Engarde Co-pack (Elim EP + Callisto) Focus Integrity Lumax EZ Marksman Prowl H2O

9,4 9,5 9,4,4 9,4,5 9,2,15,4 9,2 9,27,5 9,27,5 9,14 9,2,27 9,15,14 9,15,14 9,15,5,27 9,4,5 9,6

All All All All All All All All All All All All All All All

<5 8

<5 9

9 8 9 <5

9 6

8 5

8 9 9 9

8 6 6 6 <5 6

9 9 9 <5 8

6 8

9 8 9 8 9

8 9 9

<5 9 9 9 9 9 9 8

7 6 6

9 8 9 9 9

9 <5 8 8 8 8 9 9 9

<5 <5 <5 <5 6 6 5

9 9 9 8

9 9

<5 <5

9 9 9 8 9 9

9 9 9 9R 8 <5 9

9 7

9 9 9 9

7 9

9 8 9 <5

9 9

<5 <5

NC 8

8 9

Herbicides and Co-packs that contain glyphosate: Emerged weed control ratings at 4 weeks after application Enlist Duo (Low Rate) Enlist Duo (High Rate)

4,9 4,9

All All

NI NI

9 9

NI 9

NI NI

NC 9

NI NI

NC 81

8 8

Table 2. Weed control ratings for pre-emergent herbicide treatments in corn (Weeds are not emerged at the time of application)

Buckwheat, wild

Bur-cucumber

Chickweed

Cocklebur

Beggarsticks, nodding

Atriplex, spreading

Wild oats

Broadleaf weeds

Witchgrass

Sandbur

Proso millet

Foxtails

Fall panicum

Crabgrass

Barnyard grass

Crop tolerance

Tolerant hybrids

Field corn

Seed corn

Sweet corn

Herbicide Treatment

Mode of action

Grassy weeds (Annual)

9 8 9 8 9 9 9 8 8 <5 NI NI <5 9 9 9 NI 9 9

5 NI 5 NI 5 NI NI NI 5 NC NI NI NI NI NI 5 NI NI 5

9 9 9 9 9 9 8 9 9 NC NI NI NI 9 9 9 9 NI 9

<5 7 <5 6 6 NI 7R 7 7 0 <5 <5 NC 8 7 6 NI NI <5

Pre-emergence Herbicides and Co-packs: Weed control ratings at 8 weeks after application (Weed species not emerged at time of application) Aatrex 480 Acuron Armezon Pro + Aatrex 480 Banvel II, Hawkeye or Oracle Banvel II, Hawkeye or Oracle + Aatrex 480 Battalion Co-pack (Elim EP + Dual II Magnum + Banvel II) Broadstrike RC Callisto + Aatrex 480 Converge XT Co-pack (Converge Flexx + Converge 480) Dual II Magnum Engarde Co-pack (Elim EP + Callisto) Focus Frontier Max Integrity Lumax EZ Marksman Prowl H2O Princep Nine-T, Simadex or Simazine Primextra II Magnum 8

5 27,15,5 15,27,5 4 4,5 2,15,4 2 27,5 27,5 15 2,27 15,14 15 15,14 15,5,27 4,5 6 5 15,5

Yes Yes

Yes

Yes Yes Yes

Yes

Yes Yes Yes

Yes Yes

Yes

Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

All All All All All All All All All All All All All All All All All All All

E E E G G G E E E E E E E E E G G E E

<5 9 9 NC <5 9 NC NC 9 9 9 9 9 9 9 <5 8 9 9

<5 82 82 NC <5 8 NC 7 8 82 8 8 82 8 9 <5 72 9 82

<5 8 8 NC <5 9 NC NC 91 8 9 8 8 8 81 <5 8 81 8

<5 9 9 NC <5 8 NC NC 9 9 8 9 9 9 8 <5 8 8 9

<5 <5 <5 NC <5 7 NC NC 81 <5 NI NI <5 <5 <5 <5 <5 <5 <5

<5 6 6 NC <5 8 NC NC 7 6 8 6 6 NI NI <5 6 NI 7

<5 9 9 NC <5 9 NC NC 9 9 NI 9 9 9 9 <5 8 9 9

9 NI 9 NC NI NI NC NI 9 NI NI NI NI NI NI NI NI NI NI

<5 9 <5 8 9 NI NI 9 8 NI NI NI NI 8 9 9 NI NI <5

NI NI NI NI NI NI 9 NI NI <5 NI NI <5 NI NI NI NI NI NI

Weed Management Guide 2017

CORN (Annual, biennial or perennial listed in alphabetical order)

Lettuce, prickly

Lamb’s-quarters

Mustards

Pigweed

Pineappleweed

Ragweed, common

Ragweed, giant

Three-seeded mercury

Violet (pre flower)

Vetch

Waterhemp

81 81

Cereals

Horsetail, field

9 9 9

Horsenettle

Flower-of-an-hour

SOYBEANS

<5 <5 NI

9 9 9

5 6 9

9R 9R 9R

8 9 9

7 8 9

<5 6 8

9 9 9

control of the target weeds” 8 8 9 8

9 9 9 9 9R 9 9

9 9 9 9 9 9

9 9 9 9R 9 9

61,2

61,2 9

NI NI

8 8

NI NI

9 8 9 9 9 9

9 9

9 9 9 9

9 9 9 9 9

9 9

NI NI

7 9R 9 9 9 8R 9 9 8 8 7 8 9 9

9 <5 7 7 7 7R 5 6 7 5

9 9 7 9

5 5 7

9 9

NI NI

6 6

91 <5 91

61,2

61,2 91

6 9 8 <5 9 9

9 9 9

91 91

Velvetleaf

Waterhemp

NI NI

Three-seeded mercury

Lettuce, prickly

9R 9 9R 9 9 9 9R 9 9 <5 9 8 <5 9 9 9 8 9R 9R

Ragweed, giant

Lamb’s-quarters

9 9 9 9 9 8 8 9 9 <5 9 <5 <5 8 9 9 NI 9 9

Ragweed, common

Lady’s thumb

9 9 9 8 9 9 NI 9 9 NI NI NI NI 9 9 9 NI NI 9

Pigweeds

Jimsonweed

NI NI NI NI NI NI 8 NI NI NC NI NI NI NI NI NI NI NI NI

Nightshade

Flower-of-an-hour

<5 9 <5 9 9 9 9R 8 <5 0 NI NC NC 9 8 9 <5 NI <5

Mustards

Fleabane, Canada

(Annual, winter annual)

9 9 9 6 9 8 9 9 9 <5 9 9 <5 9 9 9 NI 9 9

9 9 9 9 9 8 7R 9 9 81 9 9 81 9 9 9 NI 9 9

8R 9 8R 9 9 9 9R 9 9 81 9 9 81 9 9 9 8 9R 9

7R 9 7R 9 9 9 8R 9 9 <5 8 7 <5 8 8 9 <5 9R 7R

<5 9 <5 7 7 7 7R 5 6 NC 5 NC NC 5 5 7 NC <5 <5

9 NI 9 <5 9 NI 8 NI 9 NC NI NI NC NI NI 9 NI NI 9

<5 9 <5 8 8 8 9 9 9 NC 9 6 NC 9 9 8 NI 7 <5

< 5R 9 6 6 6 NI < 5R 9 9 6 NI 9 6 NI 9 6 7 NI 9

Corn Table 1

1 Top growth burnoff only, regrowth will occur. 2 The addition of Merge at 0.4 l/ac. is required

to achieve this level of control.

3 Two applications will be required to achieve this

level of control throughout the season.

Weed Management Guide 2017

NI NI NI NI NI NI NC NI NI NC NI NI NI NI NI NI

R Populations of this weed exist in Ontario that are resistant

to this treatment and will not be adequately controlled. NI = “No information” available. NC = The weed is “not controlled” by this herbicide treatment.

Table 2

1 The highest labelled rate is required to achive this level of control. 2 The addition of Callisto or Callisto + Aatrex

will improve control of this species.

R Populations of this weed exist in Ontario that are resistant

to this treatment and will not be adequately controlled. NI = “No information” available. NC = The weed is “not controlled” by this herbicide treatment.

Tolerant Hyrbid Abbreviations

All = This treatment can be applied to any corn hybrid. RR = This treatment can only be applied to “Roundup Ready” corn hybrids. LL = This treatment can only be applied to “Liberty Link” corn hybrids. EN = This treatment can only be applied to “Enlist” corn hybrids.

Table 3. Emerged annual grass and broadleaf weed control ratings for post-emergent herbicides in corn

witchgrass

atriplex, spreading

beggarsticks, nodding

biennial wormwood

buckwheat, wild

bur-cucumber

chamomile, scentless

NC NC <5 9 91

7 NI <5 NI 5

NI NI NI NI NI

NI NI 9 NI NI

<5 <5 9 NC 8

NI NI 5 NI <5

<5 NI <5 NI <5

NC NI NC 9 NC NI 9 9 NC NI 9 NI NI NI NI NC 9 NI NC NI NI NI NI 9

NC <5 NC 9 NC NC 9 9 NC 91 9 91 7 91 <5 NC 9 NC NC NC 9 81 NC 9

6 7 <5 6 <5 5 7 NI 7 NI NI NI <5 9 7 7 NI 7 6 NI <5 NI NI NI

NI NI 9 NI NI NI NI NI NI <5 NI <5 NI NI NI NI NI NI NI NI NI NI NI NI

9 9 7 9 NI NI NI NI 9 NC NI NC NI NI 9 NI NI 9 9 NI NI NI NI NI

9 9 7 9 9 8 8 9 9 <5 9 <5 8 9 9 <5 9 9 NI NI 9 NI 8 NC

<5 6 NI <5 NI <5 5 NI <5 NC NI NI NI NI 6 NI 5 8 7 6-7 5 NI NI NI

<5 <5 NI NI NI <5 NI NI <5 NI NI NI NI NI <5 <5 NI 7 NI NI NI NI NI NI

9 9

7/8 8

8 8

9 9

7/8 8

8 8

wild oats

sandbur

proso millet

foxtails

fall panicum

crabgrass

Barnyard grass

Crop tolerance

Tolerant hybrids

Field corn

Seed corn

Sweet corn

Herbicide Treatment

Mode of action

Grassy weeds (Annual)

Post-Emergent Treatments for “All” Field Corn Hyrbids – Emerged weed control ratings at 4-6 weeks after application 2,4-D 2,4-DB Aatrex 480 + Crop Oil Accent Acuron Armezon Pro + Aatrex 480 + Merge/Assist + 28% UAN Banvel II, Hawkeye or Oracle Banvel II, Hawkeye or Oracle + Aatrex 480 Basagran Forté Battalion Co-pack Buctril M, Badge, Mextrol or Logic M Callisto + Aatrex 480 Converge XT co-pack Destra co-pack (Destra 75DF/Ultim + Callisto) Distinct Dual II Magnum Engarde Co-pack Frontier Max Impact or Armezon + Aatrex 480 Lumax EZ Marksman MCPA Option + Aatrex 480 Pardner, Bromotril, Brotex or Koril + Aatrex 480 Peak Permit Primextra II Magnum Prowl H2O Tropottox Plus, Clovitox Plus or Topside Ultim

4 4 5 2 27,15,5

Yes Yes Yes Yes Yes

All All All All All

F F E E E

NC NC <5 9 91

NC NC NC 72 81

NC NC NC 9 81

15,27,5

Yes

All

4 4,5 5 2,15,4 4 27,5 27,5 2,27 19,4 15 2.27 15 27,5 15,5,27 4,5 4 2 6,5 2 2 15,5 6,5 4 2

Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

All All All All All All All All All All All All All All All All All All All All All All All All

G G G G P E E G G E E E E E G P G E E G E E G G

NC <5 NC 9 NC NC 9 9 NC 91 9 91 7 91 <5 NC 9 NC NC NC 9 81 NC 9

NC NC NC 8 NC 82 9 8 NC 81 8 81 72 81 NC NC 72 NC NC NC 83 81 NC 72

NC NC NC 9 NC NC 9 9 NC 81 9 81 7 81 NC NC 9 NC NC NC 8 81 NC 9

NC <5 NC 9 NC NC 9 9 NC 91 9 91 7 91 <5 NC 9R NC NC NC 9 81 NC 9R

NC <5 NC 9 NC NC 8 9 NC <5 9 <5 7 <5 <5 NC 9 NC NC NC <5 <5 NC 9

NC NI NC 9 NC NC 7 8 NC 61 8 61 NI NI NI NC 9 NC NC NC 7 81 NC 9

Yes Yes

Yes

Yes Yes

Yes

Yes Yes Yes

Yes

Yes Yes Yes Yes

Yes Yes

NC NC <5 9R 91

NC NC <5 9 <5

NC NC NI 8 61

NC NC 9 9 NI

Post-Emergent Treatments for “Roundup Ready” Corn Hybrids – Weed control ratings at 4 weeks after application Glyphosate 1X rate Glyphosate 2X rate

9 9

Yes Yes

RR RR

E E

9 9

Post-Emergent Herbicides and co-packs containing glyphosate for “Roundup Ready” Corn Hybrids – Weed control ratings at 8 weeks after application Callisto GT Galaxy 2 co-pack (Ultim + Polaris) Halex GT + Aatrex 480

27,9 2,9 15,27,9,5

Yes

Yes Yes Yes

RR RR RR

E E E

NC NI 9

82 82 9

NC 8 9

NC NI <5

NC NI 5

NI 9 9

NC 8 9

5 NI 5

NI NI NI

8 8 9

<5 NI <5

NI NI NI

Post-Emergent tank-mix partners with glyphosate (1X rate) for “Roundup Ready and Enlist” Corn Hybrids – Weed control ratings at 8 weeks Aatrex 480 Armezon Pro + Aatrex 480 Callisto + Aatrex 480 Engarde Co-pack Destra co-pack (Destra 75DF/Ultim + Callisto) Impact or Armezon + Aatrex 480 Lumax EZ Marksman Permit Primextra II Magnum Vios G3

9,5 9,15,27,5 9,27,5 9,2,27 9,2,27 9,27,5 27,9 9,4,5 2,9 9,15,5 2,27,9

Yes

Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

RR, EN RR, EN RR, EN RR, EN RR, EN RR, EN RR, EN RR, EN RR, EN RR, EN RR, EN

E E E E G E E G G E E

<5 9 NC 9 9 7 9 <5 NC 9 9

NC 9 82 8 8 72 8 NC NC 83 8

NC 9 NC 9 9 7 8 NC NC 8 9

<5 8 NC 9 9 7 9 <5 NC 9 9

<5 7 NC 9 9 7 <5 <5 NC <5 7

NI 9 NC 8 8 NI NI NI NC 7 8

9 9 NI 9 9 NI NI NI NI NI 9

<5 9 NC 9 9 7 9 <5 NC 9 9

<5 7/8 5 NI NI <5 9 7 NI <5 NI

NI 8 NI NI NI NI NI NI NI NI NI

9 9 NI NI NI NI NI 9 NI NI NI

9 8 8 9 9 8 9 9 NI 9 9

5 8 <5 NI NI NI NI 6 6-7 5 6

NI 9 NI NI NI NI NI NI NI NI NI

Post-Emergent Treatments for “Liberty Link and Enlist” Corn Hybrids – Weed control ratings at 4 weeks after application Liberty 200SN

Yes

LL, EN

Post-Emergent tank-mix partners with Liberty for “Liberty Link and Enlist” Corn Hybrids – Weed control ratings at 8 weeks after application Aatrex 480 Callisto + Aatrex 480 Engarde Co-pack Impact or Armezon + Aatrex 480 Marksman Primextra II Magnum Vios G3

9,5 9,27,5 9,2.27 9,27,5 9,4,5 9,15,5 2,27,10

Yes Yes

Yes

Yes Yes Yes Yes Yes Yes Yes

LL, EN LL, EN LL, EN LL, EN LL, EN LL, EN LL, EN

E E E E G E E

<5 NC 9 7 <5 9 9

NC 82 8 72 NC 83 8

NC NC 9 7 NC 8 9

<5 NC 9 7 <5 9 9

<5 NC 9 7 <5 <5 7

NI NC 8 NI NI 7 8

9 NI 9 NI NI NI 9

<5 NC 9 7 <5 9 9

<5 5 NI <5 7 <5 NI

NI NI NI NI NI NI NI

9 NI NI NI 9 NI NI

9 8 9 8 9 9 9

5 <5 NI NI 6 5 6

NI NI NI NI NI NI NI

NI NI

9 9

NI NI

NI 94

NI 9

NI NI

Post-Emergent Treatments for “Enlist” Corn Hybrids – Weed control ratings at 8 weeks after application Enlist Duo (Low Rate) Enlist Duo (High Rate) 10

4,9 4,9

Yes Yes

EN EN

E E

NI 9

8 9

NI 9

Weed Management Guide 2017

CORN

8 7R 9

NI NI 6

8 NI <5 NI 8

NI NI 7 NI NI

NI NI NI NI NI

<5 NC 9 NI 9

9 7 9R NI 9

8 8 7 NC NI

9 8 9R NC 9

7 7 9 NC 9

9 9 9R 9R 9

9 9 NI 9 9 9 NI 9 NC NI NI NI 9 9 5 9 9 9 83 9 9 NI NI

9 9 9 9 9 8 7 5 8 0 5 NC 7 7 9 7 6 7 9 83R <5 NI 8 NC

9 9 5 9 6 8 6 NI 8 0 NI NC 6 7 9 6 <5 8 7R 83R <5 NI NI NI

9 9 8 9 NI NI NI NI <5 NC NI NI NI NI 9 NI 7 8 7 8 NI NI NI NI

NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI 83 9 NI NI NI

9 9 9 9 9 9 9 9 9 <5 9 <5 9 9 9 NC 9 9 9 83 9 6 NC 5

9 9 8 9 9 9 9 9 9 <5 9 <5 9 9 9 9 9R 9 9R 83 9R 9 7 5

8 9 <5 8 8 NI NI NI 9 NC NI NI NI NI 9 8 7 9 8 NI NI NI NI NC

6 9 9 6 9 9 9 9 6 <5 9 <5 9 9 9 9 9R 8 9 8 9 9R 8 7

9 9 7 9 9 9 9 9 9 81 9 81 9 9 9 NI 9 9 NI NI 9 8 7 <5

9 9 7 9 8 9 9 9 9 81 9 81 9 9 9 7 9R 8R 9R 8R 9 8R 9 9R

9 9

9R 9R

9 9

7/8 8

9 9

9 NI 9

5 NI 8

NI NI 6

NI NI NI

9 8 9

9 7 9

NI NI NI

9 NI 9

waterhemp

9 8R 9

8 8 6 NC 8

violet, field

three-seeded mercury

9 7 9

<5 <5 9 NI 9

SOYBEANS velvetleaf

ragweed, giant

8 9

pigweeds

7R 8R

nightshade

9R 9R

mustards

9 9

lettuce, prickly

7 9 NI 7 NI <5 NI NI 9 NC NI NC NI NI 9 NI 9 9 8 NI 9 NI NI NI

lamb’s-quarters

8 9 6 8 7 6 7 7 7 NC NI NC 5 5 9 8 7 7 7R 8R <5 NC NI NC

lady’s thumb

9 9 7 9 9 9 9 8 9 <5 8 <5 9 8 9 9 9R 9 9R 8R 7R <5 9 NC

jimsonweed

flower-of-an-hour

9 NI 9 NI <5

fleabane, Canada

9 NI 7 NC 6

cocklebur

8 8 9R NC 9

chickweed

ragweed, common

Broadleaf weeds (Annual, winter annual)

8 8 <5 NC 9

5 NI 6 NI NI

NI NI NC NI 9

9 9 9 9 9 9 9 9 9 NC 9 NC 7 9 9 7 <5 9 9 8 <5 6 9 5

<5 NI <5 <5 NI NI NI NI NI NC NI NC NI NI NI NI 6 NI 6 NI NI NI NI NI

8 9 <5 8 NI 9 9 NI 8 61 NI 61 NI 9 9 NI NC 5 <5 NI 9 7 NI NI

9 9

7/8 8

9 9

NI NI NI

9 7 9

NI NI NI

NI NI 9

<5 9 9 9 9 7 8 9 8 <5 8

6 7/8 NI NI NI NI NI NI NI NI

NC 6 9 NI 9 NI NI 9 NI 9 9

Cereals

after application 9 9 9 NI NI NI 9 9 8 9 8

6 9 8 5 7 7 8R 9 8R <5 8

<5 6 6 NI 7 <5 8R 9 8R <5 6

7 9 NI NI NI NI 8 9 8 NI 8

NI 9 NI NI NI NI 8 NI 8 9 8

9 9 9 9 9 9 8 9 8 9 9

9R 9 9 9 9 9 8 9 8 9R 9

7 9 NI NI NI NI NI 9 NI NI NI

9R 9 9 9 9 9 8 9 8 9 9

9 9 9 9 9 9 NI 9 NI 9 9

9R 9 9 9 9 9 8R 9 8R 9 9

9R 9 9 8 8 9 8R 9 8R 7R 9

7 5 6 NI 5 5 8R 9 8R <5 8

9 8 <5 NI NI NI NI 9 NI 9

8/9

9 9 NI NI 9 9 8

6 8 5 7 9 <5 8

<5 6 NI <5 9 <5 6

7 NI NI NI 9 NI 8

NI NI NI NI NI 9 8

9 9 9 9 9 9 9

9R 9 9 9 9 9R 9

7 NI NI NI 9 NI NI

9R 9 9 9 9 9 9

9 9 9 9 9 9 9

9R 9 9 9 9 9 9

9R 9 8 9 9 7R 9

7 6 NI 5 9 <5 8

9 <5 NI NI 9 9

<5 9 9 7 9 <5 8

6 NI NI NI NI NI

NC 9 NI NI 9 9 9

9 9

8 9

NI NI

NI 9

9 9

NI NI

9 9

NI 9

9 9

NI NI

NI 9

NI NI

Corn Table 3

1 Weeds with more than two leaves emerged at

time of application will not be controlled.

2 Large crabgrass only.

3 Weeds cannot be emerged at time of application

to achieve this level of control.

4 Top growth control only.

R Populations of this weed exist in Ontario that are resistant

Weed Management Guide 2017

to this treatment and will not be adequately controlled. NI = “No information” available. NC = The weed is “not controlled” by this herbicide treatment.

Tolerant Hyrbid Abbreviations

Table 4. Emerged perennial weed and volunteer crop control ratings for post-emergent herbicides in corn

redtop

sow-thistle, perennial

Swamp smartweed

thistle, Canada

vetch, tufted

wire-stem muhly

quackgrass

nutsedge, yellow

milkweed

horsetail, field

horse-nettle

dandelion

carrot, wild

bindweed, field

Crop tolerance

Tolerant hybrids

Field corn

Seed corn

Sweet corn

Herbicide Treatment

Mode of action

Perennial weeds (Listed in alphabetical order)

NC NC NC

NC NC NC 8 NC NC NI NC NC NC NI NC NI NC NC NC NC 9 NC NC NI NC 9

NI NI 8 NC 8 6-9 7 NI NI <5 NI 8 NI 6 6-9 9 NI NC 7 8 NI NI NC

NI NI <5 NC 6 NI NI NI NI NI NI 5 NI NI NI <5 NI NC <5 6 NI NI NC

7-9 7-9 <5 NC 8 7-9 NI NI <5 <5 NI 9 NI NI 7-9 8 7-9 NC 7 5-9 NI 8 NC

8 NI NI NC 9 NI 9 <5 5 9 NI 9 NI NI NI 8 7 NC NI 7 NI NI NC

NC NC NC <5 NC NC NI NC NC NC NI NC NI NC NC NC NC 9 NC NC NI NC 6

5 NI

8 9

5 7

8 9

7-8

NC 83

NI NI

NC 83

9 9

NI NI

Pre-Emergent Treatments for “All” Corn Hyrbrids – Control ratings for unemerged weeds at 4-6 weeks after application Dual II Magnum Frontier Max Integrity

15 15 15,14

Yes Yes Yes

Yes Yes

Yes Yes Yes

All All All

E E E

NC NC <5

NC NC 6

NC NC 7

NC NC NC

NC NC 5

NC NC NC

8 8 8

NC NC NC

Post-Emergent Treatments for “All” Corn Hyrbrids – Control ratings for emerged weeds at 4-6 weeks after application 2,4-D 2,4-DB Aatrex 480 + Crop Oil Accent Banvel II, Hawkeye or Oracle Basagran Forté Battalion Co-pack Broadstrike RC Buctril M, Badge, Mextrol or Logic M Callisto + Aatrex 480 Converge XT Co-pack Distinct Engarde Co-pack Impact or Armezon + Aatrex 480 Laddok Marksman MCPA Option + Aatrex 480 Pardner, Bromotril, Brotex or Koril + Aatrex 480 Peak Permit Tropottox Plus, Clovitox Plus or Topside Ultim

4 4 5 2 4 6 2,15,4 2 4 27,5 27,5 19,4 2.27 27,5 6,5 4,5 4 2,5 6,5 2 2 4 2

Yes Yes

Yes

Yes Yes

Yes

Yes Yes Yes

Yes

Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

All All All All All All All All All All All All All All All All All All All All All All All

F F E E G E G E P E E G E E E G P G E E G G G

7 7 7 NC 8 <5 NI NI 7 <5 NI 8 NI NI 7 8 7 NC 7 6 6-7 8 NC

<5 <5 <5 NC <5 <5 NI NI <5 6 NI 7 NI <5 5 <5 <5 NC 6 9 NI NI NC

<5 <5 <5 NC 6 <5 NI NI <5 6 NI 6 NI NI <5 6 <5 NC <5 5 NI <5 NC

NI NI NI NI 81 <5 NI NI NI NI NI 81 NI NI NI 81 NI NI NI 81 NI NI 82

<5 <5 <5 5-9 <5 <5 NI 7-8 7 <5 NI <5 NI <5 <5 <5 7 5-9 <5 <5 6 <5 6-9

<5 <5 <5 6 6 <5 NI NI 6 <5 NI 6 NI NI <5 6 6 6 <5 6 7 6 6

NC NC NC <5 NC 7 NI NI NC <5 NI NC 7 NC 7 NC NC <5 NC NC 9 <5 <5

NC NC NC 9 NC NC 7 NC NC NC NI NC 7 NC NC NC NC 9 NC NC NI NC 9

Post-Emergent Treatments for “Roundup Ready” Corn Hyrbrids – Control ratings for emerged weeds at 4 weeks after application Glyphosate 1X rate Glyphosate 2X rate

9 9

Yes Yes

RR RR

E E

7 8

<5 7-9

6 8-9

8 9

<5 6

9 9

6 8

9 9

7-8 8-9

Post-Emergent Treatments for “Liberty Link” Corn Hybrids – Weed control ratings for emerged weeds at 4 weeks after application Liberty 200SN

Yes

6-7

Post-Emergent Treatments for “Enlist” Corn Hybrids – Weed control ratings for emerged weeds at 4 weeks after application Enlist Duo (Low Rate) Enlist Duo (High Rate)

4,9 4,9

Yes Yes

EN EN

E E

NC 83

NC <5

NC 8

NI NI

8 8

NI 93

NI 83

NC 9

NI 9

Corn Table 4

1A tank mix with Ultim (nicosulfuron/rimsulfuron) is required to achieve this level of control. 2A tank mix with Distinct, Marksman or dicamba is required to achieve this level of control. 3 Two applications will be required to achieve this level of control throughout the season.

R Populations of this weed exist in Ontario that are resistant to this treatment and will not be adequately controlled. NI = “No information” available. NC = The weed is “not controlled” by this herbicide treatment.

Tolerant Hyrbid Abbreviations

Weed Management Guide 2017

P R E- E M E RGENT

GROUP

alfalfa, volunteer

adzuki beans, volunteer

canola, volunteer

canola (LL), volunteer

canola (RR), volunteer

clover (red), volunteer

cereals, volunteer

Volunteer crops

NC NC NC

NC NC NI

NC NC 9

<5 <5 <5

6 0 <5 <5 8 0 9 0 <5 <5 <5 8 NI <5 <5 8 <5 <5 <5 7-8 <5 <5 <5

NI NI 8-9 NI 8-9 <5 8-9 NI NI 8-9 NI 6-9 8-9 NI NI 9 NI NI 8-9 6-9 0 NI NI

9 NI <5 9 8 NI 9 8 8 9 9 8 9 9 NI 8 8 9 9 9 NI NI 9

<5 <5 <5 <5 9 <5 9 8 0 9 NI 9 9 9 <5 9 0 <5 <5 8 NI 0 <5

NC NC <5 8 <5 NC 8 NC NC <5 <5 <5 8 <5 <5 <5 NC 8 <5 NC NC NC 8

6 7

9 9

NC NC

6 7

9 9

NI NI

9 9

<5 <5

9 9

Get the safest broadleaf control for soybeans. With a unique Group 14 mode of action, Authority is tough on weeds and gentle on your crop for higher yields and cleaner fields. That’s why Authority’s active ingredient, sulfentrazone, is the number one pre-emergent residual broadleaf weed control in US soybean crops.* SOYBEANS

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*Source 2014 Doane Data. For complete information on Authority and all FMC products please contact your local FMC sales representative or visit FMCcrop.ca. FMC and Authority are trademarks of FMC Corporation. © 2017 FMC Corporation. All rights reserved.

Weed Management Guide 2017

Eastern Weed Management Guide Country Guide East

9,4 9,14 2,14 9,15,5 9,2 2 9,2,5 9,14 9,15,14 9,2 9,15,14 9,15,14 9,5 9,2,14 9,6 14,5 9,2 9,5 9,2,14 9,14

All All All All All All All All All All All All All All All All All All All All

4,9 4,9 4,9 9 4,9

XT EN EN All XT

2,4-D ester 700 Authority Blackhawk Co-pack (2,4-D Ester 700 + Aim EC) Boundary LQD Broadstrike RC Classic or Chaperone Conquest LQ Co-pack (Pursuit + Sencor 480F) Eragon + Merge Fierce (84 g/ac.) FirstRate Focus Integrity Lorox L (High rate) Optill Prowl H2O Perfecta co-pack (Valtera + Tricor) Pursuit, Phantom or Nu-Image Sencor, Squadron or Tricor (High rate) Step Up Co-pack (Chaperone + Valtera) Valtera (High rate)

<5 <5 <5

0 0 0

7 8 9

9 9 9

7 8 9

7 9 9

8 9

9 9 9 9

9 8

9 <5 9

<5 0 <5 0

9 8 9 8 9 5 9 9 7 7

0 0 0 0 0

9 9 9 9 9

8 9 9

9 NI NI 9 9

9 71

9 8 9

8 8 8 8 8

<5 9 9 0 <5

7 9

9 NC 9 9 9

8 NI NI 8 8

8 NI NI 7 8

9 9 9

Herbicides and Co-packs that contain glyphosate: Emerged weed control ratings at 4 weeks after application Engenia(600g/L)+glyphosate (1x) Enlist Duo (Low Rate) Enlist Duo (High Rate) glyphosate (1X Rate) Xtendimax (350 g/L)+glyphosate (1x)

7 8

<5 7

0 0 0 <5 <5 0 0 <5 0 0 0 <5 0

8 9 9

7 9 9

Tank-mix partners with glyphosate (1X rate): Weed control ratings at 8 weeks after application

<5 6 8

7 8 9

Herbicides and Co-packs that contain glyphosate: Weed control ratings at 8 weeks after application

Dandelion

Clover, red

<5 <5 <5 <5

2,9 9,14 9,2 9,2,14

Chickweed

All All All All

Assignment Co-pack (Pursuit + RU Weathermax) Flexstar GT + Turbocharge Guardian Co-pack (Polaris + Classic) Guardian Plus II co-pack (Polaris + Guardian Plus WDG)

Carrot, wild

Canola, volunteer (RR)

9 9 9

broadleaf plantain

azuki bean, volunteer

9 9 9

All All All

burdock (2nd year)

quackgrass

0 0 0

9 9 9

burcucumber

foxtails

Glyphosate (1X rate) Glyphosate (2X rate) Glyphosate (3X rate)

atriplex, spreading

corn, volunteer (RR)

9 9 9

Glyphosate: Emerged weed control ratings at 4 weeks after application

alfalfa, volunteer

bluegrass, annual

Weed species typically found at time of burndown Tolerant varieties

Herbicide Treatment

Mode of action

Table 1. Weed control ratings for pre-plant burndown treatments in soybeans

8 NI NI 7 8

7 NI NI 7 7

<5 NC 81 <5 <5

9 8 8

7 8

5 5 6

5 4 6

9 9 9 9 9 9 9 9

7 <5 <5 7 7

9 9 9 9 9

6 6 6

7 7

9 7 < 5 NC <5 8 7 7 9 7

Table 2. Weed control ratings for pre-emergent herbicide treatments in soybeans (weeds are not emerged at the time of application) Cocklebur

Chickweed

Chamomile, scentless

Burcucumber

Buckwheat, wild

Beggarsticks, nodding

Atriplex, spreading

Wild oats

Broadleaf weeds (Annual, winter annual) Witchgrass

Sandbur

Proso millet

Foxtails

Fall panicum

Crabgrass

Barnyard grass

Crop tolerance

Tolerant varieties

Herbicide Treatment

Mode of action

Grassy weeds (Annual)

Pre-emergence Herbicides and Co-packs: weed control ratings at 8 weeks after application (Weed species not emerged at time of application) Assignment Co-pack Authority Bifecta co-pack (Tricor + Valtera) Boundary LQD Broadstrike RC Canopy Pro Co-pack (Classic + Tricor 75 DF) Classic or Chaperone Command 360 ME Conquest LQ Co-pack (Pursuit + Sencor 480F) Dual II Magnum Engenia (dicamba) Fierce FirstRate Focus Freestyle Co-pack (Classic + DuPont Imazethapyr) Frontier Max Lorox L Optill Perfecta co-pack (Valtera + Tricor) Prowl H2O Pursuit, Phantom or Nu-Image Sencor, Squadron or Tricor (Low rate) Sencor, Squadron or Tricor (High rate) Step Up co-pack (Chaperone + Valtera) Treflan, Bonanza or Rival Triactor Co-pack (Nu-Image + Chaperone + Valtera) Valtera XTENDIMAX (dicamba) 14

2,9 14 5,14 15,5 2 2,5 2 27 2,5 15 4 15,14 2 15,14 2,2 15 5 2,14 14,5 6 2 5 5 2,14 3 2,2,14 14 4

All All All All All All All All All All XT All All All All All All All All All All All All All All All All XT

G E G E E G G G G E E G E E G E G E G G G G G G G G G E

7 9 NC 6 NC 8 9 9 NC 9 NC 9 7 9 5 7 7 8 7 7 7 <5 9 7 <5 E

6 9 NC 6 NC 9 7 9 NC 9 NC 9 7 9 5 7 6 8 7 6 6 <5 9 7 <5 NC

7 8 NC 6 NC 8 7 8 NC NI NC 8 7 8 5 7 6 8 7 7 7 <5 8 7 <5 NC

5 9 NC 6 <5 91 9R 9 NC 9 NC 9 9R 9 5 9R 5 8 9R 5 5 5 9 9R <5 NC

<5 <5 NC 6 NC NI 7 <5 NC NI NC NI 7 <5 5 7 <5 <5 7 <5 <5 NI 6 7 NI NC

<5 <5 NC <5 NC 6 72 <5 NC 6 NC 6 72 <5 <5 72 NI 8 72 NI NI NI 6 72 <5 NC

8 9 NC 6 NC 8 8 9 NC NI NC 9 7 9 5 7 8 8 7 8 8 <5 9 8 <5 NC

82 NC NC 82 NC NI 82 NC NC NI NC NC 82 NC NC NC 82 NC NC 82 82 NI 8 NI NI NC

NI NI NI NI NI NI NI NI 8 NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI 8

NI NI 9 NI NI 9 NI <5 NI NI 9 NI 8 <5 9 8 NI NI 8 NI 7 9 NI NI NI NI

8 9 7 NI 9 8 NI 8 9 <5 8 NI NI NI 8 <5 8 8 9 NI 8 7 7 7 <5 9 7 8

NI NI NI NI NI NI NI NC NI NI NI NI NI NI NI NI NI NI NI NI 7 8 NI NI NI NI

82 NI NI 82 NI NI 82 NC NI NI NI NI NI NI NI NI NI NI NI 82 82 NI NI NI NI NI

9 NI 8 NI NI NI 9 NC 9 9 9 NI 9 NI 9 9 9 9 9 9 9 9 9 9 9 9

7 NI 7R 7R NI 6 8 0 6 <5 9R <5 7R NC 5 7R 9 NI 7R 7 7 7R <5 8 <5 6

Weed Management Guide 2017

CORN

Ragweed, giant

Three-seeded mercury

6 7

9 9 8 8

9R 9 7 8

7 9R 6R 9R

8 9

7 9R 7R 9R

9R 6 6 9 9 9 9 9R 9R 7 7

61,2

61,2 61,2

<5 9 5 5

61,2 61,2

Lady's thumb

6 6 9R 8R 8R <5 <5 0 9 <5 9R NC 8R NC <5 9 NI <5 <5 6 91 8R <5 8R <5 9

NI NI 8 NI NI NI NI NC 9 NI NI NI 9 NI 9 9 NI NI 9 NI 9 NI NI NI NI 9

9 NI 8 9 NI 8 9 <5 9 7 NI <5 9 <5 9 9 9 NI 9 9 9 9 <5 9 7 9

9 NI NI 9 9

9 9 9 9 9

Lettuce, prickly

Flowerof-an-hour

<5 8 8 <5 <5

Lamb'squarters

Fleabane, Canada

81 NI NI 9 81

9R 9 9 7 9R 9R 6R 8 9R <5 9 9 9R <5 9R <5 9 9R 9 8 9R 9R 9R 9 8 9 9 9

Weed Management Guide 2017

NI NI NI NI NI NI NI NC NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI NI

9 9 9 9 9 9 8

9 9 9 9 9

8 9 8

6 6 7

9 9R 9R 8 8

9 9 9 9 9

8 8R 9R <5 <5

7 6R 6 <5 <5

9 9 9 9 9

<5 NI NI <5 <5

7 9 9 9R 7

9 9 9 9R 9

7 92 82 8

7 9 <5 8 <5 <5 < 5 < 5R 5 <5 61,2 1,2 6 9 <5 <5

61,2

81,2

61,2

81,2 81,2

61,2 61,2

9 9

7 6 6 7 7

81,3 71 81 4 81,3

<5 8 9 9R <5

6R 7

9R 9 <5 9R 9

Cereals

8 NI NI 8 8

Velvetleaf

9 <5 9 <5

9 <5 9

Threeseeded mercury

7 <5 7 6R 8R 5R 8R 8 7 9R

81,2

Ragweed, giant

61,2 61,2

Ragweed, common

4 7

6 61,2

<5 9 <5 9

Pigweeds

9R 8R <5 9

9R 9R 9R

Nightshade

4 6 8

Mustards

61,2

7 8 9

SOYBEANS

9 9 9 8 9 9 NI <5 9 <5 6 9 NI NI NI <5 9 9 9 NI 9 9 9 9 <5 9 8 6

9R 9 9 8 7R <5 NC <5 9R 81 9 9 <5 9 9R 81 9 9R 9 NI 9R <5 <5 9 <5 9 9 9

9R 9 9 8 9R 9R 7R <5 9R 81 9 9 9R 9 9R 81 9R 9R 9 8R 9R 9R 9R 9 8 9 9 9

8R 4 7 <5 8R 8R 5R 8 8R <5 7 7 9R <5 8R <5 8 8R 8 <5 8R 8R 8R 8R <5 8 7 7

<5 <5 7R 8R NI <5 6 NC 9 <5 9R NC 8R NC 6 7 7 NC 6 7 7 8R <5 6 <5 9

9 NI 8 7 NI NI 5 NC <5 NI 9 NI NI NC 7 6 9 NI 6 8 9 7 NI 5 9 <5

7 <5 9 8 <5 9 9 NC 8 7 9 NI 9 NC 6 9 7 NI 9 7 7 8 <5 9 7 8

Waterhemp

Ragweed, common

9 9 9

Vetch

Pineappleweed

9 9

<5 9 5 <5

9 9 9

Violet (pre flower)

Pigweed

8 9 9

Mustards

9R 9R 9R

Lamb'squarters

9R 9R 9R

9 9 9

9 NI NI 9 9

<5 6 9

<5 <5 NI

81 81

9 8 9 9R 9

9 9 9

Lettuce, prickly

9 9 9

Horsetail, field

9R 9R 9R

Horsenettle

Flower-ofan-hour

(Annual, biennial or perennial – listed in alphabetical order) Fleabane, Canada

< 5R 7 8 8 < 5R < 5R < 5R NI < 5R 6 <5 9 < 5R 9 < 5R 6 NC < 5R 9 7 < 5R < 5R < 5R 81,2 8 8 8 <5

Soybeans table 1

1 Top growth burnoff only, regrowth will occur. 2 The addition of Merge at 0.4 l/ac. is required

to achieve this level of control.

3 The high rate is required to achieve this level of control.

table 2

1 The highest labelled rate is required to

achieve this level of control.

2 This level of control is achieved when the weed

is emerged at the time of application.

Tolerant Varieties

All = this treatment can be applied to any soybean variety RR = this treatment can only be applied to “Roundup Ready” soybean varieties LL = this treatment can only be applied to “Liberty Link” soybean varieties EN = this treatment can only be applied to “Enlist” soybean varieties XT = this treatment can only be applied to "Roundup Ready 2 Xtend" soybean varieties R Populations of this weed exist in Ontario that are resistant

to this treatment and will not be adequately controlled. NI = “No information” available. NC = The weed is “not controlled” by this herbicide treatment.

Atriplex, spreading

Beggarsticks, nodding

Biennial wormwood

Buckwheat, wild

Burcucumber

Chamomile, scentless

Witchgrass

Wild oats

Broadleaf weeds (Annual, winter annual)

Sandbur

Proso millet

Foxtails

Fall panicum

Crabgrass

Barnyard grass

Grassy weeds (Annual) Crop tolerance

Tolerant varieties

Herbicide Treatment

Mode of action

Table 3. Emerged annual grass and broadleaf weed control ratings for post-emergent herbicides in soybeans

NC NC NC NC NC <5 NI NI NI 6 NI 5 NI

NC NC NC NC NC 9 <5 9 9 8 <5 9 7

NC NC NC NC NC 7 7 7 7 NI NI 8 NI

NC NC NC NC NC 7 7 4 7 NI 8 8 8

NC NC NC NC NC NI NI <5 NI <5 NI NI NI

NC NC NC NC NC <5 <5 NI NI <5 <5 <5 NI

Post-Emergent Treatments for “All” Soybean Varieties – Weed control ratings at 4-6 weeks after application Assure II or Yuma GL Excel Super Poast Ultra Select or Arrow Venture L Basagran Forté Blazer Classic or Chaperone FirstRate Pinnacle SG Reflex Cleansweep Co-pack (Pursuit + Basagran Forté) Pursuit or Panthom or Nu-Image

1 1 1 1 1 5 14 2 2 2 14 2,5 2

All All All All All All All All All All All All All

E E E E E G F G G G F/G G G

9 9 9 9 9 NC NC NC NC NC NC 8 8

8 8 8 8 8 NC NC NC NC NC NC 8 8

9 9 9 9 9 NC NC NC NC NC NC 6 6

9 9 9 9 8 NC NC NC NC NC NC 9R 9R

9 9 9 9 9 NC NC NC NC NC NC 7 7

9 8 7 7 9 NC NC NC NC NC NC NI 7

9 9 9 9 9 NC NC NC NC NC NC 8 8

9 9 9 9 9 NC NC NC NC NC NC 9 9

Post-Emergent Treatments for “Roundup Ready” Soybean Varieties – Weed control ratings at 4-6 weeks after application Assignment Co-pack (RU Weathermax + Pursuit) Flexstar Glyphosate 1X rate Glyphosate 2X rate Guardian Co-pack (Polaris + Classic)

9,2 9,14 9 9 9,2

EN,RR,XT EN,RR,XT EN,RR,XT EN,RR,XT EN,RR,XT

G G E E G

9 9 9 9 9

7/8 7/8 7/8 8 7/8

8 8 8 8 8

9 9 9 9 9

8 7/8 7/8 8 8

8 8 8 8 8

9 9 9 9 9

Post-Emergent Treatments for “Liberty Link and Enlist” Soybean Varieties – Weed control ratings at 4-6 weeks after application Liberty 200SN

LL, EN

NI NI

NI 94

NI 9

NI NI

9 9

9 7/8

<5 8

<5 9

Post-Emergent Treatments for “Enlist” Soybean Varieties – Weed control ratings at 4-6 weeks after application Enlist Duo (Low Rate) Enlist Duo (High Rate)

4,9 4,9

EN EN

E E

NI 9

8 9

NI 9

NI NI

9 9

NI NI

Post-Emergent Treatments for “Roundup ready 2 Xtend” Soybean Varieties – Weed control ratings at 4-6 weeks after application Engenia or Xtendimax Engenia or Xtendimax + glyphosate (1X rate)

4 4,9

XT XT

E E

NC 9

6 7/8

NI 8

9 9

Table 4. Emerged perennial weed and volunteer crop control ratings for post-emergent herbicides in soybeans Quackgrass

Redtop

Sow-thistle, perennial

Thistle, Canada

Vetch

Wire-stem muhly

Nutsedge, yellow

Milkweed

Horsetail, field

Horse-nettle

Dandelion

Carrot, wild

Bindweed, field

Crop tolerance

Tolerant varieties

Herbicide Treatment

Mode of action

Perennial weeds (Listed in alphabetical order)

9 <5 6 7 8 NC NC NC NC NC NC <5 <5

6 <5 6 7 7 NC NC NC NC NC NC NI NI

NC NC NC NC NC 6-9 6-9 5-9 5-9 4-7 5-8 6-9 4-7

NC NC NC NC NC 7-9 6-9 7-9 7-9 4-8 5-9 7-9 5-9

NC NC NC NC NC <5 5 5 5 <5 5 <5 <5

7 5 6 6 8 NC NC NC NC NC NC <5 <5

1 1 1 1 1 5 14 2 2 2 14 2,5 2

All All All All All All All All All All All All All

E E E E E G F G G G F/G G G

NC NC NC NC NC <5 <5 <5 <5 <5 <5 <5 <5

NC NC NC NC NC <5 <5 6-9 2-7 <5 <5 2-6 2-7

NC NC NC NC NC <5 <5 6 <5 <5 <5 <5 <5

NC NC NC NC NC <5 <5 <5 6 <5 <5 <5 <5

NC NC NC NC NC <5 6 <5 <5 <5 6 <5 <5

NC NC NC NC NC <5 <5 9 <5 <5 <5 <5 <5

NC NC NC NC NC 7 <5 9 <5 <5 <5 7 7

9,2 9,14 9 9 9 9,2

EN,RR,XT EN,RR,XT EN,RR,XT EN,RR,XT EN,RR,XT EN,RR,XT

G G E E E G

7 7 7 8 8 7

<5 <5 <5 7-9 7-9 <5

7 7 6 8-9 9 9

8 8 8 9 9 8

<5 6 <5 6 6 <5

9 9 9 9 9 9

6 6 6 8 8 9

9 9 9 9 9 9

7-8 7-8 7-8 8-9 8-9 7-8

8 8 8 9 9 8

5 5 5 7 8 5

8 8 8 9 9 8

Post-Emergent Treatments for “Liberty Link and Enlist” Soybean Varieties – Weed control ratings at 4-6 weeks after application Liberty 200SN

LL, EN

6-7

NI 9

NC 8

81 81

NI NI

8 8

81 81

NC 8

Post-Emergent Treatments for “Enlist” Soybean Varieties – Weed control ratings at 4-6 weeks after application Enlist Duo (Low Rate) Enlist Duo (High Rate)

4,9 4,9

EN EN

E E

NC 82

NC <5

NC 8

NI NI

8 8

NI 8

NI 82

NC 9

Post-Emergent Treatments for “Roundup ready 2 Xtend” Soybean Varieties – Weed control ratings at 4-6 weeks after application Engenia or Xtendimax Engenia or Xtendimax + glyphosate (1X rate) 16

4 4,9

XT XT

E E

82 82

<5 <5

6 6

82 8

<5 <5

6 9

nc 82

nc 9

NC 9

8 8

Weed Management Guide 2017

NC NC NC NC NC 9 9 9 9 8 9 9 9

9 9 9 9 9

Waterhemp

Mustards

NC NC NC NC NC <5 <5 6 6 <5 6 <5 <5

Violet, field

Lettuce, prickly

NC NC NC NC NC 8 6 <5 <5 9R 6 8 8R

Velvetleaf

Lamb'squarters

NC NC NC NC NC 9 8 8 NI 8 8 9 9

Three-seeded mercury

Lady's thumb

NC NC NC NC NC 8 6 7 8 8 7 8 7

Ragweed, giant

Flower-ofan-hour

NC NC NC NC NC 5 <5 8R 9R <5 <5 5 <5

Ragweed, common

Fleabane, Canada

NC NC NC NC NC 9 6 8R 9R 5 7 9 8R

Pigweeds

Cocklebur

NC NC NC NC NC NI NI NI NI NI NI 9 9

Nightshade

Chickweed

CORN

NC NC NC NC NC 7 8 <5 <5 <5 8 9R 9R

NC NC NC NC NC 7 9 9R <5 9R 9 9R 9R

NC NC NC NC NC 7 9 8R 9R 5 9 9R 9R

NC NC NC NC NC 6 7 8R 9R <5 7 7R 8R

NC NC NC NC NC 5 6 7 7 5 7 6 5

NC NC NC NC NC 9 7 8 9 8 6 9 9

NC NC NC NC NC <5 6 5 8 <5 7 5 5

NC NC NC NC NC <5 9 <5 <5 <5 9 <5 <5

9 9 9 9 9

7/8 7/8 7/8 8 7/8

9 9 9 9 9

9R 9R 9R 9R

9 9 9 9 9

8 8 7/8 8 8

9 9 9 9 9

8 9R 9R 9R

7R 7R 8R 7R

8 8 8 9 8

8/9

8 9

NI NI

8 9

NI NI

NI 9

9 9

NI NI

9 9

NI 9

9 9

NI NI

NI 9

NI NI

NI 9

9 9

9 9R

9 9

9 7/8

9 9

8 9

9 9

8 81

9 9

7 8

9 9

<5 7/8

81 81

SOYBEANS Cereals

Soybeans table 3 & 4

R = Populations of this weed exist in Ontario

that are resistant to this treatment and will not be adequately controlled. NI = “No information” available. NC = The weed is “not controlled” by this herbicide treatment.

Tolerant Varieties

All = This treatment can be applied to any soybean variety. RR = This treatment can only be applied to “Roundup Ready” soybean varieties. LL = This treatment can only be applied to “Liberty Link” soybean varieties. EN = This treatment can only be applied to “Enlist” soybean varieties.

Alfalfa, volunteer

Adzuki beans, volunteer

Canola, volunteer

Canola (LL), volunteer

Canola (RR), volunteer

Clover (red), volunteer

Corn, volunteer

Corn (LL), volunteer

Corn (LL/RR), volunteer

Corn (RR), volunteer

Corn (Enlist), volunteer

Cereals, volunteer

Volunteer crops (Listed in alphabetical order)

NC NC NC NC NC 0 6 <5 <5 0 6 0 0

NC NC NC NC NC <5 <5 4-8 <5 <5 <5 <5 <5

NC NC NC NC NC NI NI 9 8 <5 8 9 9

NC NC NC NC NC <5 6 <5 <5 <5 6 <5 <5

8-9 7-9 6-8 7-9 7-9 NC <5 <5 <5 NC <5 <5 <5

0 0 4-9 6-9 0 NC <5 <5 <5 NC <5 <5 <5

9 9 9 9 9 NC NC <5 <5 NC <5 <5 <5

6 6 6 7 8 6

9 9 9 9 9 9

9 8 NC NC NC 8

6 6 6 7 8 6

9 9 9 9 9 9

<5 <5 NC NC NC <5

9 9 9 9 9 9

NI NI

9 9

<5 <5

9 9

NC NC

9 9

8 8

8-9 9

<5 9

<5 <5

9 9

NC NC

9 9

Weed Management Guide 2017

Table 1. Weed control ratings for pre-plant burndown treatments in cereals

Carrot, wild

Chickweed

Clover, red

Dandelion

Fleabane, Canada

Flower-of-an-hour

Henbit

Horsenettle

9 9 9

Canola, volunteer (RR)

Buckwheat, wild

7 9 9

Broadleaf plantain

Atriplex, spreading

7 8 9

Burdock (2nd year)

Alfalfa, volunteer

8 NI NI

Burcucumber

Azuki bean, volunteer

Witchgrass

Sandbur

Quackgrass

Foxtails

Bluegrass, annual

Tolerant hybrids

Herbicide Treatment

Mode of action

Weed species typically found at time of burndown (Annual, biennial or perennial – listed in alphabetical order)

<5 6 8

6 9 9

0 0 0

7 8 9

9 9 9

7 8 9

7 9 9

9R 9R 9R

9 9 9

7 8 8

81 81 NI

Glyphosate: Emerged weed control ratings at 4 weeks after application Glyphosate (1X rate) Glyphosate (2X rate) Glyphosate (3X rate)

9 9 9

All All All

9 9 9

7 8

Tank-mix partners with glyphosate (1X rate): Weed control ratings at 8 weeks after application – in other words “If I add a herbicide to glyphosate, will it improve 2,4-D Ester 700 Eragon + Merge

9,4 9,14

All All

8 6

6 71

8 9

9 9

<5 5

9 9

<5 <5

8 7

7 7

8 9

<5 <5

NC 8

8 9

NI NI

Herbicides and Co-packs that contain glyphosate: Emerged weed control ratings at 4 weeks after application Enlist Duo (Low Rate) Enlist Duo (High Rate)

4,9 4,9

All All

NI NI

9 9

NI 9

NI NI

NC 9

NI NI

NC 81

8 8

9 9

Table 2. Emerged annual grass and broadleaf weed control ratings for post-emergent herbicides in cereals

bentgrass, loose silky

bluegrass, annual

brome, downy

chess/cheat grass

foxtails

fowl meadow grass

wild oats

atriplex, spreading

biennial wormwood

buckwheat, wild

bur-cucumber

canola, volunteer

carrot, wild

Cereal Crop Tolerance

red clover underseeded

Grassy weeds (Annual)

alfalfa underseeded

wheat

rye

oats

barley

Herbicide Treatment

mode of action

Crop Uses

NI NI

7 NI

9 NI

6 NI

8 <5

NI NI

7 NI

NI NI

NI 7

NI NI

9 9

NI NI

NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC 8 NC NC NC

NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NI NC NC NC

NC NC NC NC <5 NC <5 NC NC NC NC NC NC NC NC NC NC NC NC <5 NC NC NC 83 NC NC NC

NC NC NC NC <5 NC <5 NC NC NC NC NC NC NC NC NC NC NC NC <5 NC NC NC 93 NC NC NC

NC NC NC NC 9 NC 9 NC NC NC NC NC NC NC NC NC NC NC NC 9 NC NC NC 7 NC NC NC

NC NC NC NC 8 NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NI NC NC NC

NC NC NC NC 9 NC 9 NC NC NC NC NC NC NC NC NC NC NC NC 9 NC NC NC 9 NC NC NC

NI 9 NI NI NC 9 NC 9 <5 9 9 3 9 9 NI 9 NI NI NI NC NI 9 9 NI 9 NI 6

NI NI NI NI NC NI NC NI NI NI NI NI NI NI NI NI NI NI NI NC NI NI NI NI NI NI 9

<5 <5 <5 6 NC 9 NC 9 9 8 9 8 8 8 2 2 2 8 8 NC 9 9 9 7 7 7 9

NI NI NI NI NC NI NC NI NI NI NI NI NI NI NI NI NI NI NI NC NI NI NI NI NI NI 7

9 9 9 9 NC 9 NC 9 9 9 9 NC 9 9 9 9 9 8 9 NC 8 9 9 95 9 9 9

<5 <5 <5 <5 NC 7 NC 7 <5 <5 5 7 7 7 <5 <5 <5 <5 <5 NC 7 7 7 NI <5 <5 8

Pre-Emergent Treatments – Emerged weed control ratings at 4-6 weeks after application Eragon + Merge

Yes

Pre-Emergent Treatments – Un-Emerged weed control ratings at 4-6 weeks after application Focus Valtera

14,15 14

Yes Yes1

G G

Post-Emergent Treatments – Emerged weed control ratings at 4-6 weeks after application 2,4-D Amine 2,4-D Ester 2,4-DB (Embutox, Caliber, Cobutox) 2,4-DB + MCPA Achieve Liquid or Bison Barricade Bengal or Vigil Boost M co-pack Buctril M, Badge, Mextrol or Logic M Estaprop XT, Dichlorprop DC or Turboprop Infinity Lontrel Lontrel + 2,4-D Lontrel + MCPA MCPA Amine MCPA Ester MCPA Sodium Pardner, Bromotril, Brotex or Koril Pixxaro co-pack Puma Advance Refine SG Refine SG + 2,4-D Refine M co-pack Simplicity Trophy co-pack Tropotox Plus, Clovitox Plus or TopSide Peak + Pardner 18

4 4 4 4,4 1 2,2,4,4 1 2,4 4,5 4 27,5 4 4,4 4,4 4 4 4 5 4,4,4 1 2 2,4 2,4 2 4,4 4 2,4

Yes1 Yes1 Yes Yes Yes1 Yes

Yes Yes

Yes Yes Yes Yes

Yes1 Yes1 Yes1 Yes1 Yes1 Yes1 Yes1 Yes1 Yes1 Yes1 Yes1 Yes Yes1 Yes1 Yes1 Yes1

Yes Yes

Yes

Yes Yes Yes Yes

Yes1

Yes

Yes Yes

Yes

Yes Yes Yes Yes Yes Yes Yes1 Yes Yes Yes Yes Yes1 Yes1 Yes1 Yes Yes Yes Yes Yes Yes1 Yes Yes Yes Yes Yes Yes Yes

Yes Yes Yes

Yes

G G G G G E G G E G E G G G G G G E E G E G G G G G E

Weed Management Guide 2017

CORN

Waterhemp

5 6 9

Vetch

Pineappleweed

Pigweed 9 9 9

Violet (pre flower)

9 9 9

Cereals

Three-seeded mercury

9 9 9

8 9 9

7 8 9

<5 6 8

9 9 9

9 7

6 92

91 61,2

NI NI

9 9

NI NI

6 6

91 91

8 9

Ragweed, giant

9 9 9

Ragweed, common

<5 <5 71

Mustards

Lamb's-quarters

Lettuce, prickly

Horsetail, field

SOYBEANS

9R 9R

7 8 9 9

Cereals Table 1

1 Top growth burnoff only, regrowth will occur. 2 The addition of Merge at 0.4 l/ac. is required to achieve this level of control.

Table 2: Cereals

1 Only labelled for use on spring-planted varieties. 2 Top growth control only.

3 Fall application is more likely to give this level of control 4 Will not control mouse-eared chickweed 5 Will not control IMI tolerant canola

control of the target weeds” 8

61,2 8 8

NI NI

9 9

NI NI

R Populations of this weed exist in Ontario that are resistant to

this treatment and will not be adequately controlled. NI = “No information” available. NC = The weed is “not controlled” by this herbicide treatment.

chamomile, scentless

chickweed

cleavers

cocklebur

dandelion

fleabane, Canada

flower-of-an-hour

ground ivy

henbit

hemp nettle

horsetail

lady’s thumb

lamb’s-quarters

lettuce, prickly

mustards

nightshade

pigweeds

ragweed, common

ragweed, giant

speedwell species

shepherd’s purse

sow-thistle

stinkweed

thistle, Canada

three-seeded mercury

velvetleaf

vetch

violet, field

waterhemp

Broadleaf weeds (All life cycles listed in alphabetical order)

NI NI

8 9

8 NI

NI <5

NI 7

NI <5

NI NI

NI 7

7 9

NI NI

NI 8

NI 9

NI 7

NI <5

NI NI

9 NI

NI NI

8 NI

NI NI

NI 7

NI NI

8 8

<5 <5 NI NI NC NI NC 8 NI 6 NI NI <5 <5 <5 <5 NI NI 5 NC 8 8 8 NI NI NI NI

<5 <5 <5 <5 NC 8 NC 7 <5 <5 7 <5 <5 5 5 5 NI NI 84 NC 7 7 7 8 8 NI <5

4 4 NI NI NC 9 NC 6 5 5 8 8 8 8 4 4 4 NI 9 NC 6 6 6 9 9 NI NI

8 8 8 8 NC 9 NC 7 9 NI NI 5 8 7 7 7 7 8 9 NC NI 8 7 NI 9 NI 9

<5 <5 <5 <5 NC 5 NC 5 <5 6 8 <5 <5 <5 <5 <5 <5 NI 7 NC NI NI 5 6 5 NI 5

8 9 NI NI NC 8 NC 6 6 9 9 9 9 9 7 8 NI NI 9 NC NI NI 6 NI 8 NI 7

NI NI NI NI NC NI NC NI NI NI NI NI NI NI NI NI NI NI NI NC NI NI NI NI NI NI NI

7 7 NI NI NC 6 NC 8 9 7 NI NI 7 8 8 9 NI NI NI NC 6 8 8 NI NI NI NI

<5 <5 NI NI NC <5 NC <5 <5 <5 NI NI NI NI <5 <5 NI NI 9 NC <5 <5 <5 93 NI NI NI

<5 <5 <5 <5 NC 9 NC 9 7 7 9 NI <5 7 8 8 8 <5 9 NC 9 9 9 9 8 8 9

9 9 NI NI NC 9 NC 9 9 9 6 8 9 9 9 9 NI NI 8 NC NI NI 9 NI 9 NI 9

<5 <5 <5 <5 NC 9 NC 9 9 8 9 <5 9 9 9 9 9 8 7 NC 9 9 9 9 7 <5 9

9 9 7 9 NC 9 NC 9 9 9 9 <5 9 9 9 9 9 9 9 NC 9R 9 9 6 9 9 9

9 9 NI NI NC 8 NC 9 8 9 8 NI 9 9 9 9 NI NI 9 NC 8 9 9 NI 8 NI 8

9 9 7 9 NC 9 NC 9 9 9 9 <5 9 9 9 9 9 7 9 NC 8 9 9 9 9 9 9

7 7 7 7 NC NI NC 7 9 NI 9 <5 7 NI NI NI NI 9 NI NC NI 7 NI NI NI NI NI

9 9 9 9 NC 9 NC 9 8 9 9 <5 9 9 9 9 9 7 9 NC 9R 9 9 8 9 9 9

9 9 8 8 NC 9 NC 9 9 9 9 7 9 9 9 9 8 9 9 NC 7R 9 9 NI 9 9 9

9 9 NI NI NC 9 NC 7 7 9 8 9 9 9 8 8 NI NI 9 NC NI NI 7 NI 9 NI 5

6 8 NI NI NC 9 NC 9 5 9 <5 NI NI NI 9 9 NI NI NI NC 9 9 9 NI NI NI 8

9 9 8 8 NC 9 NC 9 9 9 9 NI 9 9 9 9 9 8 9 NC 9 9 9 9 9 9 9

5 5 5 5 NC 8 NC 8 7 8 7 9 9 9 7 7 NI 6 9 NC 8 8 8 NI 8 9 8

9 9 6 6 NC 9 NC 9 9 9 9 NI 9 9 9 9 9 8 9 NC 9 9 9 9 9 9 9

8 8 NI NI NC 8 NC 7 5 8 <5 9 9 9 8 8 NI 5 <5 NC 7 7 7 6 8 9 5

8 9 NI NI NC NI NC NI NI NI NI NI NI NI 8 8 NI <5 NI NC NI NI NI NI NI NI 8

8 8 8 8 NC 8 NC 8 9 NI 9 NI 8 8 8 8 8 9 9 NC 8 9 9 NI NI 9 9

8 8 <5 <5 NC 9 NC 6 5 7 5 9 9 9 7 7 NI NI 8 NC NI 6 6 NI 9 NI NI

5 5 NI NI NC 8 NC 8 NI 9 NI NI NI NI 8 8 NI NI NI NC 8 8 8 NI NI NI 6

NI NI NI NI NC NI NC NI 8 NI NI NI NI NI NI NI NI NI NI NC NI NI NI NI NI NI NI

Weed Management Guide 2017

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Data from Purdue Extension Weed Science and Ohio State Horticulture and crop science extension fact sheet “The benefits of Preemergence herbicides in Round-up Ready soybean” April 2008.

Always read and follow label directions. Genuity ®, Roundup Ready 2 Yield ®, and Roundup Ready 2 Xtend ® are trademarks of Monsanto Technology LLC, Monsanto Canada, Inc. licensee. Bifecta™ is a trademark of Nufarm Agriculture Inc. BlackHawk ® is a registered trademark of Nufarm Agriculture Inc. 52289-01/17