Weed management guide 2018 by Farm Business Communications

Weed Management Guide

CORN SOYBEANS Cereals

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Weed Management Guide

The following tables are taken from the 2018 Guide to Weed Control — Field Crops, Publication 75A. There are two new additions to the information in these tables that may be of interest. First is the inclusion of fall applied herbicide options in winter wheat. The second is the sensitivity of inter sown cover crops into standing corn to the various soil applied herbicide options. As always, if you have suggestions for how we can make the information in the guide of more value to you, then I would welcome that feedback.

Mike Cowbrough Provincial Weed Specialist, Field Crops (519)-820-2336

CORN | SOYBEANS | Cereals

Rye grass — interseeded*

Grassy weeds

Broadleaf weeds found at time of burndown (Annual, Biennial or perennial)

Bluegrass, annual Foxtails Quackgrass Sandbur Witchgrass Azuki bean, volunteer Alfalfa, volunteer Atriplex, spreading Buckwheat, wild Bur cucumber Burdock (2nd year) Broadleaf plantain Canola, volunteer (RR) Carrot, wild Chickweed Clover, red Dandelion Fleabane, Canada Flower-of-an-hour Horse-nettle Horsetail, field Lettuce, prickly Lamb’s-quarters Mustards Pigweed Pineappleweed Ragweed, common Ragweed, giant Three-seeded mercury Violet (pre flower) Vetch Waterhemp

Clover — interseeded*

Field corn

Seed corn

Sweet corn

Herbicide Treatment

Mode of action

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

Glyphosate: Emerged weed control ratings at 4 weeks after application (i.e. no residual control) Glyphosate (1X rate) Glyphosate (2X rate) Glyphosate (3X rate)

9 9 9

√ √ √

√ NR NR √ NR NR √ NR NR

9 9 9 9 9 8 7 7 9 7 - 6 9 9 9 9 9 8 8 9 9 8 6 9 9 9 9 9 9 8 9 9 9 8 8 9

7 9 7 7 9R 9 81 - 9 9 9 9 5 9R 9R 8 7 - 9 8 9 8 9 9R 9 81 - 9 9 9 9 6 9R 9R 9 8 6 9 9 9 9 9 9R 9 81 6 9 9 9 9 9 9R 9R 9 9 8 9

Tank-mix partners with 1X rate of glyphosate (weeds emerged at time of application): Weed control ratings at 4 weeks after application Eragon + Merge Blackhawk

14 4,14

x x

√ LR √

6 9 8 8 9

- 71 9 9 5 - 7 - - - 9 - 8 -

7 9 8 7

- 61,2 - - - - - 7 9 9 9

8 7 8 9

- 92 61,2 - - 81 8

9 7

- 91 8

Common Tank-mix partners with glyphosate (1X rate): Weed control ratings at 8 weeks after application (i.e. residual control) Battalion co-pack (Elim EP + Dual II Magnum + Banvel II) Broadstrike RC Callisto + Aatrex 480 Converge XT co-pack (Converge Flexx + Converge 480) Engarde Engenia or Xtendimax Focus Integrity Lumax EZ Marksman Primextra II Magnum Prowl H2O + Aatrex Liquid 480 Zidua

2,15,4

√

8 9

9 9 9

2 27,5

x √

√ √ HR MR

8 9 9 9

8 - 8 9 6 9 9

8 -

7 -

9 9 9 9

8 -

9 5

8 -

- - - 91 9

27,5

√

√ MR LR

7 9

8 8 5

9 6 9

9 9 9

9 6

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

x x x √ √ x √ x x

x x x x √ x √ x x

√ √ √ √ √ √ √ √ √

8 5 8

8 9 9 9 9 9

8 6 6 6 6 6

- - - 9 - - - 6 8 - - 9 - 8 9 - - - - - - -

9 - 9 - 7 8 - 9 - 71 9 - 9 - 6 - - - - - - -

8 9 -

8 9 9 9 8 -

9 7 9 -

8 7 -

9 9 8 9 -

- - - - 61,2 - - - - - -

8 9 -

9 9 8 9 9 9 9 -

8 9 7 8 9 9 -

HR HR LR LR HR HR HR MR LR

LR LR HR LR** HR LR HR MR HR

9 9 9 8 9

5 -

9 9 9 9 9 -

9 9 9 9 9 9 -

9 9 9 9 9 9 9

5 - - 7 7 6 91 - - - 5 - 92 61,2 5 - - 91 7 9 - - - - - - - - - - -

9 6 9 9 9 9

Herbicides and Co-packs that contain glyphosate (weeds emerged at time of application): Weed control ratings at 4 weeks after application Enlist Duo (low rate) Enlist Duo (high rate) Roundup Xtend

4,9 4,9 4,9

x x x

x Yes LR x Yes LR x √ HR LR

- 9 - - - - - - - - - 8 9 - 9 - - 8 - - 8 - 9 9 9 - 9 9 - - - - - 9 - 81 8 9 - 9 - 8 9 - - 8 - 9 9 9 9 9 9 9 9 8 8 8 9 7 - 8 - 7 9 9 7 9 9 81 - 9 9 9 9

Table 1. Weed control ratings for pre-plant burndown treatments in corn * Risk of establishing cover crops after application: NR = No risk, LR = Low risk, MR = Moderate risk, HR = High risk ** Only applicable when using the lowest labeled rate. √ Can be used on this crop. x Cannot be used on this crop. - Less than 50% control or is not recommended. R Populations exist that are resistant to this herbicide and won’t be controlled. 1 Top growth burnoff only, re-growth 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 2018

9 9 - 6 91 9 9 - 6 91 7 9 8 7 81,3 -

Visual weed control ratings: 9 = 90-100%, 8 = 80-89%, 7 = 70-79%, 6 = 60-69%, 5 = 50-59% Crop tolerance ratings: E = Excellent, G = Good, F = Fair, P = Poor Tolerant variety abbreviations: 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. 3

CORN | SOYBEANS | Cereals Table 2. Weed control ratings for pre-emergence herbicides in corn Broadleaf weeds (Annual, winter annual)

Tolerant hybrids Crop tolerance Barnyard grass Crabgrass Fall panicum Foxtails Proso millet Sandbur Wild oats Witchgrass Atriplex, spreading Beggarsticks, nodding Buckwheat, wild Bur cucumber Chickweed Cocklebur Fleabane, Canada Flower-of-an-hour Jimsonweed Lady’s thumb Lamb’s-quarters Lettuce, prickly Mustards Nightshade Pigweeds Ragweed, common Ragweed, giant Three-seeded mercury Velvetleaf Waterhemp

Rye grass — interseeded*

Clover — interseeded*

Sweet corn Seed corn Field corn

Herbicide Treatment

Mode of action

Grassy weeds (Annual)

Pre-emergence Herbicides and Co-packs (weed species not emerged at time of application): Weed control ratings at 8 weeks after application Aatrex 480 Acuron Armezon Pro + Aatrex 480 Armezon Pro + Marksman Battalion co-pack (Elim EP + Dual II Magnum + Banvel II) Broadstrike RC

9 5 9

27,15,5

√ √ √ HR MR All E 9 82 8 9

9 9

15,27,5

x x √

HR All E 9 82 8 9

6 9 9

9 5 9

15,27,5,4 x x √ HR HR All E 9 82 8 9

6 9 9 9

2,15,4

MR All E

x x √ HR HR All G 9 8 9 8 7 8

9 9 9R -

9 9 8R 7R -

9 9 9

9 9 9 9 9

9 9

9 9 9R -

9 9 8R 7R -

9 5 9 6 9

9 9 9

9 9 9 9 7 9 8 6

8 8 9 9 7

9 8 9

9 9 9

9 9 9 9 5

9 9 9 9 6 9 9 9

All E

9 9

√ √ √ HR MR All E

9 7 8

Converge XT co-pack (Converge Flexx + Converge 480)

27,5

x √ √ MR LR All E 9 8 91 9 81 7 9 9 8

8 5 9 7

9 9 9

Engenia or Xtendimax Focus + Aatrex 480 Frontier Max

27,5

Dual II Magnum

x x √

9 7 9

Callisto + Aatrex 480

Engarde WG

√ √ √

8 9

9 9

√ √ √ HR HR All E 9 82 8 9

- 81 81 -

2,27

x x √ HR

LR All E 9 8 9 8

9 9

9 9 9 8 5

x x √ HR

LR All G -

9 6 9

8 9 9

6 9 9 9 7

15,14

x x √ LR

HR All E 9 8 8 9

9 9 9 7

6 9

√ √ √

All E 9 82 8 9

- 81 81 -

Integrity

15,14

√ x √ LR LR** All E 9 8 8 9

9 8

9 8 9

9 9 9 8 5

Lumax EZ

15,5,27

√ √ √ HR HR All E 9 9 81 8

9 9

9 7 8

9 9 9

9 9 9 8 5

9 9

Marksman

4,5

x x √ HR MR All G -

9 5 9 6 9

9 9 9

Primextra II Magnum

15,5

√ √ √ HR HR All E 9 82 8 9

9 5 9

9 9 9R -

9 9 9 7R -

9 9 9 9 7 9 8 6 9

Princep Nine-T, Simadex or Simazine

√ x √

All E 9 9 81 8

9 9R -

9 9 9R 9R -

Prowl H2O + Aatrex 480

x x √ MR MR All G 8 72 8 8

Zidua

x x √ LR

9 9

6 9

HR All E 9 8 8 9

Table 2. Weed control ratings for pre-emergence herbicides in corn * Risk of establishing cover crops after application: NR = No risk, LR = Low risk, MR = Moderate risk, HR = High risk ** Only applicable when using the lowest labeled rate. √ Can be used on this crop. x Cannot be used on this crop. - Less than 50% control or is not recommended. R Populations exist that are resistant to this herbicide and won’t be controlled. 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. Visual weed control ratings: 9 = 90-100%, 8 = 80-89%, 7 = 70-79%, 6 = 60-69%, 5 = 50-59% Crop tolerance ratings: E = Excellent, G = Good, F = Fair, P = Poor Tolerant variety abbreviations: 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.

Weed Management Guide 2018

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DuPont Freestyle TM

herbicide

CORN | SOYBEANS | Cereals Table 3. Emerged annual grass and broadleaf weed control ratings for post-emergence herbicides in corn Flower-of-an-hour Jimsonweed Lady’s thumb Lamb’s-quarters Lettuce, prickly Mustards Nightshade Pigweeds Ragweed, common Ragweed, giant Three-seeded mercury Velvetleaf Violet, field Waterhemp

Fleabane, Canada

Broadleaf weeds (Annual, winter annual)

Crop tolerance Barnyard grass Crabgrass Fall panicum Foxtails Proso millet Sandbur Wild oats Witchgrass Atriplex, spreading Beggarsticks, nodding Biennial wormwood Buckwheat, wild Bur cucumber Chamomile, scentless Chickweed Cocklebur

Tolerant hybrids

Sweet corn Seed corn Field corn

Herbicide Treatment

Mode of action

Grassy weeds (Annual)

Post-emergence herbicides in corn (weeds emerged at the time of application): 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 Armezon Pro + Marksman Basagran Forté Battalion co-pack Buctril M, Badge, Mextrol or Logic M Callisto + Aatrex 480 Converge XT co-pack Destra IS Distinct Dual II Magnum Engarde Engenia or Xtendimax Frontier Max Impact or Armezon + Aatrex Lumax EZ Marksman MCPA MCPA/MCPB Option + Aatrex 480 Pardner, Bromotril, Brotex or Koril + Aatrex 480 Peak (75% WG) Permit Primextra II Magnum Prowl H2O Ultim Zidua

4 4 5 2 27,27,15,5

√ √ √ √ √

All All All All All

F - F - E - E 9 72 E 91 81

x x √

All

E 8 82 81 8 7

15,27,5,4 x x √ 5 √ √ √ 2,15,4 x x √

All All All

E 8 82 81 8 7 - - 8 7 - 9 9 6 G - - - - - - - - - 9 7 7 G 9 8 9 9 9 9 9 9 6 - 9 9 -

All

P -

15,27,5

x x √ √ x

x x √

9 81

9R 91

- - - 9 8 - 61 -

- - 9 9 9 - 91

7 5

9 -

9 8

5 -

- - - 9 - - 9

8 8 6 8

- 9 9 - - 9 - 9 9 9

8 8

7 -

- - - 9 - - 9

9 5 9

9 - 9 9 9 9 9 9 9 9 9 9 - 9 8 - 9 8 - 9 7 7 7 6 - 9 - 9 - 9 9 8 6 9 9 9 8 7 9 - 8 -

9 7 9R 9

8 8 7 -

9 8 9R 9

7 7 9 9

9 9 9R 9R 9

8 8 9R 9

9 9 8 5 - - 8 - 7 9 - 6 - - - - 6 - 9 - 9

9 9

9 9 9 9 5

9 9 8 9 9 8 9 7

27,5 27,5 2,27 19,4 15 2, 27 4 15

√ x x x √ x x √

√ √ √ √ √ √ √ √

All All All All All All All All

E E G G E E G E

9 9 81 9 81

9 9 91 9 91

8 9 9 -

7 8 61 8 61

9 9 9 -

9 9 91 9 91

5 - - 8 7 - - 8 - - - 9 7 - 9 9 - - - - - - 9 6 - 9 9 - - - -

5 -

- 9 8 - 9 7 - - 5 - 9 8 - - - - 5 - 9 9 - - -

8 6 8 9 -

- - - - - - 9 - -

9 9 9 9 9 9 -

9 8 -

9 9 9 6 9 6 -

6 7 7 7 8 -

9 7 -

9 9 9 9 9 9 -

9 9 8 61 8 61

27,5

√ √ √

All

E 7 72 7

9 9

9 9 9 9 5

√ √ x x √ x x √

9 9 91 9 91

9 8 81 8 81

E G P G G

- - - 9 72

- - - 9 9R

- - 9 - - - - 7 - - - - 7 - - - - 9 9 9 9 -

- - 9 - 9 9 6 - - - - - 8 - - 9 5

- 9 7 - 9 9 - 5 7 - - 8 - 9 6

7 9 6 -

9 7

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

6,5

√ √ √

All

9 9

7 9 7

2,4 2 15,5 6,5 2 2

x √ √ x x x

All All All All All All

E G E E G E

9 81 9 9

83 81 72 8

8 81 9 -

9 81 9R 9

9 -

7 81 9 6

9 -

9 81 9 9

6 -

9 - 7 - 9 - - 6-7 - 83 - 9 5 - 9 - - - - 9 - - - - - - - - -

√ √ √ x x x

√ √ √ √ √ √

All All All All All

x x x x x

√ √ √ √ √

x x x x x

15,5,27 4,5 4 4 2

9 9 9 9 81 9 9 81

9 8R -

7 83R -

7 8 83 - 9 - - - -

9 9 9 9 81 9 9 81

9 9 7 9 9R

9 9 8 9 8 9 -

8 9 9 9 9R

5 9 9 8 - 7 9

9 - 9 9 - 9 7 - 9 - - 6 -

9 9 9 8 9 8R 9 7 9 9 9 8 9 6 5 -

9 83 9R 9 5 -

8 -

9 8 9 9R 7 -

9 8 9

9 8R 9 8R 9R 9

9 8R 7R -

7 8R -

8 9 -

9 6 8 - - - 9 6 - 7 5 - - - 9

Post-emergence herbicides for “Roundup Ready” Corn Hybrids: Weed control ratings at 4 weeks after application Glyphosate (1X rate)

√ √ √ RR, EN E 9 9 9 9 9 9 9 9 7/8 8 9 7/8 8

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

Glyphosate (2X rate)

√ √ √ RR, EN E 9 9 9 9 9 9 9 9 8 8 9 8

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

Post-emergence herbicides and co-packs containing glyphosate for “Roundup Ready” Corn Hybrids: Weed control ratings at 8 weeks after application Callisto GT Halex GT + Aatrex 480 Roundup Xtend

- NC -

9 9 8

9 9

9 9 9 9 6

15,27,9,5 √ √ √ RR, EN E 9 9 9 9

27,9

5 9 9 5

9 9

9 9 9 9 6

x x √ RR, EN G 9 9 9 9 9 9 9 9 7/8 8 9 9

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

4,9

x x √ RR, EN E

- 82 -

9 8

Post-emergence tank-mix partners with glyphosate for “Roundup Ready and Enlist” Corn Hybrids: Weed control ratings at 8 weeks after application Vios G3

2,27,9

x x √ RR, EN E 9 8 9 9 7 8 9 9

9 6

8 8

8 8 9 9

9 9 9 9 8

8 9 8 9 9 9 9 6

Post-emergence herbicides for “Liberty-Link and Enlist” Corn Hybrids: Weed control ratings at 4 weeks after application Liberty 200SN

x x √ LL, EN E 9 9 9 9 9

8 9

Post-emergence tank-mix partners with Liberty for “Liberty-Link and Enlist” Corn Hybrids: Weed control ratings at 8 weeks after application Vios G3

2,27,10

x x √ LL, EN E 9 8 9 9 7 8 9 9

9 6

8 8

8 8 9 9

9 9 9 9 8

Post-emergence herbicides for “Enlist” Corn Hybrids: Weed control ratings at 4 weeks after application

Enlist Duo (low rate)

4,9

x x √

9 8

Enlist Duo (high rate)

4,9

x x √

E 9 9 9 9 9 9 9 9 7/8 8 94 9

9 9 9

9 9 9 9 9 9 9 9 9 9 8 9 7/8 9

9 9 9

Weed Management Guide 2018

Table 4. Emerged perennial weed & volunteer crop control ratings for post-emergent herbicides in corn Canola (RR), volunteer

Clover (red), volunteer

cereals, volunteer

8 9

9 9 9 8 9 9 8 9 8 9 8 8 9 9 9 9

9 9 9 9 9 9 9 8 -

8 8 8 8 8

Canola (LL), volunteer

8 9

Canola, volunteer

Adzuki beans, volunteer

Alfalfa, volunteer

Wire-stem muhly

Vetch, tufted

Thistle, Canada

Volunteer crops

Swamp smartweed

Sow-thistle, perennial

Redtop

Quackgrass

Nutsedge, yellow

Milkweed

Horsetail, field

Horse-nettle

Dandelion

Carrot, wild

Crop tolerance

Bindweed, field

Tolerant hybrids

Field Corn

Seed corn

Sweet corn

Herbicide Treatment

Mode of action

Perennial weeds

Pre-emergence herbicides in corn (weeds emerged at time of application — expect nutsedge): Weed control ratings at 4-6 weeks after application Broadstrike RC Dual II Magnum Frontier Max Integrity

2 15 15 15,14

x √ √ √

x √ √ x

√ √ √ √

All All All All

E E E E

- 7-8 - - - - - 5 -

8 8 8

Post-emergence herbicides in corn (weeds emerged at time of application): Weed control ratings at 4-6 weeks after application 2,4-D 2,4-DB Aatrex 480 + Crop Oil Accent Basagran Forté Battalion co-pack Buctril M, Badge, Mextrol or Logic M Callisto + Aatrex 480 Converge XT co-pack Distinct Engarde WG Engenia or Xtendimax Impact or Armezon + Aatrex 480 Marksman MCPA MCPA/MCPB (Tropottox Plus, Clovitox Plus or Topside) Option + Aatrex 480 Pardner, Bromotril, Brotex or Koril + Aatrex 480 Peak (75% WG) Permit Ultim

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

x x √ √ √ x x √ x x x x √ x x x x √ x √ x

x x √ √ √ x x √ √ x x x √ x x x x √ √ √ x

√ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √

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

F 7 F 7 E 7 E - E - G - P 7 E - 6 E - G 8 7 E - G 8 E - G 8 P 7 G 8 G - E 7 6 E 6 9 G 6-7 G - -

6 6 6 6 5 -

81 81 81 81 82

5-9 7 7 5-9 6 6-9

6 6 6 6 6 6 6 6 6 7 6

7 7 9 -

9 7 7 9 9

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

- 6 - - - - 8-9 - - - - - 9 8-9 - - - - 8-9 - - - 8 6-9 - - 8-9 - 8 8-9 - - - 8 9 - - - - 9 - - - 8-9 - 7-8 6-9 - - 6 - -

Post-emergence herbicides for “Roundup Ready” Corn Hyrbrids (weeds emerged at time of application): Control ratings at 4 weeks after application Glyphosate 1X Glyphosate 2X Roundup Xtend

9 9 4,9

√ √ x

√ √ √

RR, EN E 7 - 6 8 RR, EN E 8 7-9 8-9 9 RR, EN G 82 - 6 8

6 -

9 6 9 9 8 9 9 82 9

9 7-8 5 9 8-9 9 8 -

8 5 8 9 7 9 8 81 8

6 7 8

9 9 9

9 9 -

6 7 9

9 9 9

Post-emergence herbicides for “Liberty-Link” Corn Hybrids (weeds emerged at time of application): Control ratings at 4 weeks after application Liberty 200SN

√

6 6-7 -

7 7-8 -

9 9

Post-emergence herbicides for “Enlist” Corn Hybrids (weeds emerged at time of application): Control ratings at 4 weeks after application Enlist Duo (low rate) Enlist Duo (high rate)

4,9 4,9

x x

Table 3. Emerged annual grass and broadleaf weed control ratings for post-emergence herbicides in corn √ x NC

Can be used on this crop. Cannot be used on this crop. Less than 50% control or is not recommended. The weed is “not controlled” by this herbicide treatment. R Populations exist that are resistant to this herbicide and won’t be controlled. 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. Visual weed control ratings: 9 = 90-100%, 8 = 80-89%, 7 = 70-79%, 6 = 60-69%, 5 = 50-59% Crop tolerance ratings: E = Excellent, G = Good, F = Fair, P = Poor Tolerant variety abbreviations: 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.

Weed Management Guide 2018

√ √

EN EN

E E 83

8 8

- - 93 83 9

- - 9 5 83 9

Table 4. Emerged perennial weed & volunteer crop control ratings for post-emergent herbicides in corn √ x NI

Can be used on this crop. Cannot be used on this crop. Less than 50% control or is not recommended. “No information” available. R Populations exist that are resistant to this herbicide and won’t be controlled. 1 A tank-mix with Ultim (nicosulfuron/rimsulfuron) is required to achieve this level of control. 2 A 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. Visual weed control ratings: 9 = 90-100%, 8 = 80-89%, 7 = 70-79%, 6 = 60-69%, 5 = 50-59% Crop tolerance ratings: E = Excellent, G = Good, F = Fair, P = Poor Tolerant variety abbreviations: 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.

CORN | SOYBEANS | Cereals Table 1. Weed control ratings for pre-plant burndown herbicides in soybean

9 R 9R 9 R 9R 9 R 9R

Waterhemp

Ragweed, common

6 9

Vetch

Pineappleweed

9 9 9

Violet (pre flower)

Pigweed

9 9 9

Three-seeded mercury

Mustards

9 9 9

Ragweed, giant

Lamb’s-quarters

Lettuce, prickly

Horsetail, field

Horse-nettle

Flower-of-an-hour

Fleabane, Canada

Dandelion

Clover, red

Chickweed

Carrot, wild

Canola, volunteer (RR)

Broadleaf plantain

Burdock (2nd year)

Bur cucumber

Atriplex, spreading

Alfalfa, volunteer

Azuki bean, volunteer

Quackgrass

Foxtails

Corn, volunteer (RR)

Bluegrass, annual

Tolerant varieties

Herbicide Treatment

Mode of action

Weed species typically found at time of burndown (Annual, biennial or perennial)

8 9 9

7 8 9

4 6 8

9R 9R 9R

- 9 - 81 8 92 61,2 -

Pre-plant burndown with glyphosate (all soybean varieties): Emerged weed control ratings at 4 weeks after application Glyphosate (1X rate) Glyphosate (2X rate) Glyphosate (2.78X rate)

9 9 9

All All All

9 9 9

8 -

7 8 9

7 9 9

7 8 -

6 8

8 9 9

7 8 9

9 9 9

7 8 9

7 9 9

9R 9R 9R

9 9 9

81 81 -

9 9 9

Pre-plant burndown tank-mix partners that offer enhanced contact weed control: Weed control ratings at 4 weeks after application 2,4-D Ester 700 Blackhawk Eragon LQ + Merge

4 4,14 14

All All All

9 8 -

8 9

9 9 9

8 -

7 8 7

8 7 9

- - - - 7 - 61,2 -

9 -

7 8 8

9 9 7

Pre-plant burndown co-packs with glyphosate that offer residual weed control: Weed control ratings at 8 weeks after application Assignment co-pack (Pursuit + RU Weathermax) Flexstar GT + Turbocharge Guardian co-pack (Polaris + Classic) Guardian Plus II co-pack (Polaris + Guardian Plus WDG)

2,9

All

9,14 9,2

All All

9 9

6 -

9 8

9 7

9 5

9 -

9,2,14

All

- 61,2 -

- 81,2 61,2 9

9 9

ENLIST SOYBEANS ONLY — co-packs or tank-mixes that contain glyphosate: Emerged weed control ratings at 4 weeks after application Enlist Duo (low rate) Enlist Duo (high rate)

4,9 4,9

EN EN

9 9

8 8

9 9

7 8

8 8

9 9

6 6

71 81

8 9

ROUNDUP READY 2 XTEND SOYBEANS ONLY — co-packs or tank-mixes that contain glyphosate: Emerged weed control ratings at 4 weeks after application Engenia or Xtendimax + glyphosate Roundup Xtend

4,9 4,9

XT XT

9 9

8 8

7 7

8 8

7 7

9 9

7 7

9 9

81 81

9 9

7 7

9 9

8 8

7 81,3 7 81,3 -

Co-packs and Tank-mix partners with glyphosate that offer residual weed control: Weed control ratings at 8 weeks after application Authority Authority Supreme Bifecta co-pack (Valtera + Tricor) Boundary LQD Broadstrike RC Canopy Pro Classic or Chaperone Command 360 ME Conquest LQ co-pack (Pursuit + Sencor 480F) Dual II Magnum Fierce FirstRate Focus Freestyle Frontier Max Integrity Lorox L (high rate) Optill Prowl H2O Pursuit, Phantom or Nu-Image Sencor, Squadron or Tricor (high rate) Step Up co-pack (Chaperone + Valtera) Valtera (high rate) Zidua

14 14,15

All All

9 9

14,5

All

- 61,2 -

- 81,2 61,2 -

8R 7R 9R 6 5R 8 -

7 7

8 -

8R 6R

9 9 9 9

- 7 9R 8R - 8R 6R - 8 6 9 6 8 7 - 8R 6R 9R 6

- 82 61,2 8 - - - 92 61,2 - 92 61,2 - - - -

- 81,2 61,2 9

8 9

9 -

- 81,2 61,2 9 - - - 9

15,5 2 2,5 2 13

All All All All All

9 9 9

8 9 -

8 9 9 -

8 8 -

9 8 9 -

8 8 -

9R 9 8R -

8 -

4 7 4 -

7 9R 9R 6R 9

8 9 9 -

7 9R 9R 7R 6

9 -

2,5

All

15 15,14 2 15,14 2,2 15 15,14 5 2,14 6 2 5

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

5 8 8 5 -

9 9 9 9 9 8 9 8 9 9 9

9 7 9 9 7 9

71 71 -

9 9 -

9 9 9 9 9 8

5 6 8 5 4 6 6 6

9 9 9 9 9 9 9

8 7 7 -

8R 8R 9 9 9

- - 61,2 - - - - - 61,2 - - 61,2 - - - -

9 4 4

9R 6 9R 6 9 9 9 9R 9R

9 9 9 9 9 9 9

83 9R 9 9R 83 9R 9 9R 9R

2,14

All

- 61,2 -

14 15

All All

7 9

5 -

9 -

5 -

- 61,2 - - -

7 -

8 -R -R 6 9 9 -R 6 -R -

Weed Management Guide 2018

Table 2. Weed control ratings for pre-emergence herbicides in soybean (weeds are not emerged at the time of application)

Three-seeded mercury

Velvetleaf

Waterhemp

6 -

9 -

7 9

5,14

All

15,5 2

All All

E E

9 -

8 -

9 -

NC -

9 -

9 8

6 9R

7 9R

8 9

8 7R

8 9R 8R

8 -

2,5

All

9R 8R 8R

Ragweed, common

6 -

Pigweeds

9R 9R 8R 9 9 4 9 9 -

Nightshade

9 -

Mustards

9R 9 9

Lamb’s-quarters

9 -

Lady’s thumb

9 -

Flower-of-an-hour

Fleabane, Canada

7R -

Cocklebur

9 -

Chickweed

Chamomile, scentless

Bur cucumber

8 9 9

Buckwheat, wild

8 -

Beggarsticks, nodding

Atriplex, spreading

7 9

Witchgrass

Wild oats

72 6

Sandbur

7 -

Proso millet

9R 9

Foxtails

7 8

Fall panicum

7 9

Crabgrass

7 9

Barnyard grass

G E E

Crop tolerance

All All All

Tolerant varieties

2,9 14 14,15

Mode of action

Herbicide Treatment

Broadleaf weeds (Annual, winter annual)

Ragweed, giant

Grassy weeds (Annual)

Pre-emergence herbicides and Co-packs (weeds not emerged at time of application): Weed control ratings at 8 weeks after application Assignment co-pack Authority Authority Supreme 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 Fierce FirstRate Focus Freestyle co-pack (Classic + DuPont Imazethapyr) Frontier Max Integrity Lorox L Optill 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, Triflurex or Rival Triactor co-pack (Nu-Image + Chaperone + Valtera) Valtera Zidua

2 27

All All

G G

8R -

6R 8

2,5

All

9R 9R 8R

15 15,14 2 15,14

All All All All

E G E E

9 9 9

8 8

9 9 9

6 6

9 9

9 -

9 9 -

9R 9R -

7 -

9 9R -

9 -

9 7 9R 9R 9R 9 -

9 -

7 9 -

6 9 9

2,2

All

9R 9R 8R 8R

-R

15 15,14 5 2,14 6 2 5 5

All All All All All All All All

E E G E G G G G

9 7 5 7 8 7 7 7

9 7 5 7 8 7 6 6

8 5 7 8 7 7 7

9 7 5 9R 8 9R 5 5

5 7 7 -

72 8 72 -

82 82

9 5 7 8 7 8 8

9 8 8 7

8 8 8 7 7

82 82

9 9 9 9 9 9

5 7R 7R 7 7

9 6 91

9 9 9 9

9 9 9 9 9

6 9 9R 8 9R 9R 9R

9 9 9 9 9

81 9 9R 9R -

81 5 9R 9R 8R 9R 9R 9R

7 8 8R 8R 8R 8R

6 6 7 6 7 7

7 6 6 8 9

3 6 9 9 7 7

6 5 NC 7 -

2,14

All

8R 8R

81,2

9 9

All

2,5,14

All

14 15

All All

G E

7 -

9 -

7 -

9 -

8 -

9 9

7 -

9 -

7 6

8 9

Pre-emergence herbicides and co-packs (weed species not emerged at time of application): Weed control ratings at 8 weeks after application Engenia or Xtendimax (Dicamba)

Table 1. Weed control ratings for pre-plant burndown herbicides in soybean

Table 2. Weed control ratings for pre-emergence herbicides in soybean (weeds are not emerged at the time of application)

- Less than 50% control or is not recommended. Populations exist that are resistant to this herbicide and won’t be controlled. 1 Top growth burnoff only, re-growth 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. Visual weed control ratings: 9 = 90-100%, 8 = 80-89%, 7 = 70-79%, 6 = 60-69%, 5 = 50-59% Crop tolerance ratings: E = Excellent, G = Good, F = Fair, P = Poor Tolerant variety abbreviations: 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.

- Less than 50% control or is not recommended. NC The weed is “not controlled” by this herbicide treatment. R Populations exist that are resistant to this herbicide and won’t be controlled. 1 The highest labelled rate is required to achive this level of control. 2 This level of control is achieved when the weed is emerged at the time of application. Visual weed control ratings: 9 = 90-100%, 8 = 80-89%, 7 = 70-79%, 6 = 60-69%, 5 = 50-59% Crop tolerance ratings: E = Excellent, G = Good, F = Fair, P = Poor Tolerant variety abbreviations: 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.

Weed Management Guide 2018

CORN | SOYBEANS | Cereals Table 3. Emerged annual grass and broadleaf weed control ratings for post-emergence herbicides in soybean

Nightshade

Pigweeds

Ragweed, common

Ragweed, giant

Three-seeded mercury

Velvetleaf

Violet, field

Waterhemp

Mustards

Lettuce, prickly

Lamb’s-quarters

Lady’s thumb

Flower-of-an-hour

Fleabane, Canada

Cocklebur

Chickweed

Chamomile, scentless

Bur cucumber

Buckwheat, wild

Biennial wormwood

Beggarsticks, nodding

Atriplex, spreading

Broadleaf weeds (Annual, winter annual)

Witchgrass

Wild oats

Sandbur

Proso millet

Foxtails

Fall panicum

Crabgrass

Crop tolerance

Barnyard grass

Tolerant varieties

Herbicide Treatment

Mode of action

Grassy weeds (Annual)

Post-emergence grass herbicides (weeds emerged at time of application): Weed control ratings at 4-6 weeks after application Assure II or Yuma GL Excel Super Poast Ultra Select or Arrow Venture L

1 1 1 1 1

All All All All All

E E E E E

9 9 9 9 9

8 8 8 8 8

9 9 9 9 9

9 9 9 9 8

9 9 9 9 9

9 8 7 7 9

9 9 9 9 9

Post-emergence broadleaf herbicides (weeds emerged at time of application): Weed control ratings at 4-6 weeks after application Basagran Forté Blazer, Ultra Classic or Chaperone FirstRate Pinnacle SG Reflex

6 14 2 2 2 14

All All All All All All

G F G G G F/G

<5 6 -

9 <5 9 9 8 <5

7 7 7 -

7 - <5 7 - <5 4 <5 7 - - <5 <5 8 - <5

9 6 8R 9R 5 7

5 <5 8R 9R <5 <5

8 6 7 8 8 7

9 8 <5 8 6 <5 8 <5 6 - <5 6 8 9R < 5 8 6 6

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

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

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

Post-emergence grass and broadleaf herbicides (weeds emerged at time of application): Weed control ratings at 4-6 weeks after application Cleansweep co-pack (Pursuit + Basagran Forté) Pursuit or Panthom or Nu-Image

2,6

All

<5 9 -

8 <5 9

9R 9R 9R 7R

5 <5

8R < 5 7

8R < 5 9

9R 9R 9R 8R

5 <5

Post-emergence herbicides for “Roundup Ready” soybean varieties (weeds emerged at time of application): 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

EN,RR,XT

9 7/8 8

9R 7R

9 7/8 9R

9,14 9 9

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

G E E

9 9 9

9 7/8 8 9 7/8 8 9 8 8

9 9 9

9R 9R 9R

9 8 9 9 7/8 9 9 8 9

9 9 9

8 7R 9R 7R 9R 8R

8 8 9

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

9,2

EN,RR,XT

9 7/8 8

9R 7R

9 7/8 9R

Post-emergence herbicides for “Liberty-Link and Enlist” Soybean Varieties (weeds emerged at time of application): Weed control ratings at 4-6 weeks after application Liberty 200SN

LL,EN

- 8/9 9

Post-emergence herbicides for “Enlist” Soybean Varieties (weeds emerged at time of application): 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

8 9

9 9

- - 9 7/8 8

9 9

8 9

9 9

- - 9 7/8 9

9 9

81 81

9 9

7 8

9 < 5 81 9 7/8 81

Post-emergence herbicides for “Roundup Ready 2 Xtend” Soybean Varieties (weeds emerged at time of application): Weed control ratings at 4-6 weeks after application Engenia or Xtendimax Roundup Xtend

4 4,9

XT XT

E E

- 6 9 7/8 8

9 9

9 <5 <5 9 9 8 8 9

9 9

9 9R

9 9

8 9

6 9

Table 3. Emerged annual grass and broadleaf weed control ratings for post-emergence herbicides in soybean - Less than 50% control or is not recommended. Populations exist that are resistant to this herbicide and won’t be controlled. 1 The highest labelled rate is required to achive this level of control. Visual weed control ratings: 9 = 90-100%, 8 = 80-89%, 7 = 70-79%, 6 = 60-69%, 5 = 50-59% Crop tolerance ratings: E = Excellent, G = Good, F = Fair, P = Poor Tolerant variety abbreviations: 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

Weed Management Guide 2018

Table 4. Emerged perennial weed & volunteer crop control ratings for post-emergence herbicides in soybean

Vetch

Wire-stem muhly

Alfalfa, volunteer

Canola, volunteer

Canola (LL), volunteer

Canola (RR), volunteer

Clover (red), volunteer

6 6 7 7 -

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

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

5 5 5 5

7 5 6 6 8 -

6 - 4-8 6 -

9 8 8

- 8-9 8-9 8-9 8-9 - 9 - 7-9 7-9 7-9 7-9 - 9 - 6-8 6-8 6-8 6-8 6-8 9 - 7-9 7-9 7-9 7-9 7-9 9 - 7-9 7-9 7-9 7-9 - 9 6 6 -

2,6

All

2-6

6-9 7-9

All

2-7

4-7 5-9

Cereals, volunteer

Thistle, Canada

Corn (Enlist), volunteer

Sow-thistle, perennial

9 6 7 8 -

Corn (RR), volunteer

Redtop

Corn (LL/RR), volunteer

Quackgrass

7 9 -

Corn (LL), volunteer

Nutsedge, yellow

9 -

Corn, volunteer

Milkweed

6 6

Horsetail, field

6 -

Horse-nettle

6 -

Dandelion

6-9 2-7 -

Carrot, wild

Bindweed, field

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

Crop tolerance

All All All All All All All All All All All

Tolerant varieties

1 1 1 1 1 6 14 2 2 2 14

Mode of action

Herbicide Treatment

Volunteer crops

Adzuki beans, volunteer

Perennial weeds

Post Emergence herbicides: 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, Ultra Classic or Chaperone FirstRate Pinnacle SG Reflex Cleansweep co-pack (Pursuit + Basagran Forté) Pursuit or Panthom or Nu-Image

Post-emergence herbicides 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) Glyphosate (2.78X rate) Guardian co-pack (Polaris + Classic)

9,2

EN,RR,XT

9,14 9 9 9 9,2

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

G E E E G

7 7 8 8 7

7-8

7 8 6 8 7-9 8-9 9 7-9 9 9 9 8

6 6 6 -

9 9 9 9 9

6 6 8 8 9

9 9 9 9 9

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

8 8 9 9 8

5 5 7 8 5

8 8 9 9 8

6 6 7 8 6

9 9 9 9 9

8 8

6 6 7 8 6

9 9 9 9 9

Post-emergence herbicides for “Liberty-Link and Enlist” soybean varieties: Weed control ratings at 4-6 weeks after application Liberty 200SN

LL,EN

6-7

9 9

Post-emergence herbicides 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

8 8

81 81

Post-emergence herbicides for “Roundup Ready 2 Xtend” soybean varieties: Weed control ratings at 4-6 weeks after application Engenia or Xtendimax Roundup Xtend

4 4,9

XT XT

E E

82 82

6 6

81 8

6 9

8 8

81 81

8 8-9 8 9

Table 4. Emerged perennial weed & volunteer crop control ratings for post-emergence herbicides in soybean - Less than 50% control or is not recommended. Populations exist that are resistant to this herbicide and won’t be controlled. 1 The highest labelled rate is required to achive this level of control. Visual weed control ratings: 9 = 90-100%, 8 = 80-89%, 7 = 70-79%, 6 = 60-69%, 5 = 50-59% Crop tolerance ratings: E = Excellent, G = Good, F = Fair, P = Poor Tolerant variety abbreviations: 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

Weed Management Guide 2018

CORN | SOYBEANS | Cereals Table 1. Weed control ratings for pre-plant burndown herbicides in cereals

Bindweed, field

Burdock (2nd year)

Thistle, Canada

Canola, volunteer (RR)

Carrot, wild

Chickweed

Cleavers

Dandelion

Fleabane, Canada

Henbit

Horse-nettle

Horsetail, field

Lettuce, prickly

Plantain, broad-leaved

Shepherd’s purse

Sow-thistle, perennial

Speedwell species

Stinkweed

Vetch

Violet (pre flower)

Broadleaf weeds typically found at time of burndown (Annual, biennial or perennial)

Quackgrass

Wild oats

Chess

Brome, downy

Bluegrass, annual

Bentgrass, loose-silky

Barley Oats Rye Wheat

Herbicide Treatment

Mode of action

Crop uses Grassy weeds at burndown

7 8

9 9

7 9

9R 9R

9 9

81 81

9 9

8 9

9 9

8 9

9 9

7 8

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

9 9

√ √ √ √ √ √ √ √

9 9

Herbicides that contain glyphosate: Emerged weed control ratings at 4 weeks after application Enlist Duo

4,9

x √

6 7 71

9 8 9 9

9 9 -

7 9 7

8 9 9

8 7 81

8 8 9

9 9 9

9 61

6 9

8 -

Selective Herbicides: Emerged weed control ratings at 4 weeks after application 2,4-D Ester 700 Aim EC + Merge Blackhawk Eragon LQ + Merge

4 14 4,14 14

x √ x x

√ √ √ √

8 8 -

Selective Herbicides: Un-emerged weed control ratings at 6-8 weeks after application Focus Treflan

15,14 x x 6 √ x

x √ x √

8 -

7 -

Table 2. Emerged grassy and broadleaf weed control ratings for fall applied post-emergence herbicides in winter wheat

Herbicide Treatment

Bentgrass, loose silky

Bluegrass

Chess

Downy brome

Bindweed, field

Canola, volunteer

Carrot, wild

Chamomile, scentless

Chickweed

Cleavers

Dandelion

Fleabane, Canada

Henbit

Hemp nettle

Horsetail

Lettuce, prickly

Speedwell species

Shepherd’s purse

Sow-thistle

Stinkweed

Thistle, Canada

Vetch

Violet, field

Buctril M Infinity Pardner Peak + Pardner Refine SG Simplicity GoDRI + Assist Oil Tropotox Plus

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

9 -

7 -

9 -

9 9 8 9 8 8 9

5 8 7 -

8 9 -

7 8 7 8 -

8 6 8 -

8 5 6 6 -

6 9 7 6 -

8 9 8 9 -

7 9 9 9 8 8

91 61 91 -

8 8 8 8 -

8 9 -

9 9 8 9 9 8 9

71 71 61 81 81 91

9 9 8 9 9 8 9

51 71 61 91

81 81 -

6 8 -

Table 1. Weed control ratings for pre-plant burndown herbicides in cereals √ Can be used on this crop. x Cannot be used on this crop. - Less than 50% control or is not recommended. R Populations exist that are resistant to this herbicide and won’t be controlled. 1 Top growth burnoff only, re-growth will occur. Visual weed control ratings: 9 = 90-100%, 8 = 80-89%, 7 = 70-79%, 6 = 60-69%, 5 = 50-59% Crop tolerance ratings: E = Excellent, G = Good, F = Fair, P = Poor

Broadleaf weeds that are typically emerged in the fall

Mode of action

Grassy weeds

Table 2. Emerged grassy and broadleaf weed control ratings for fall applied post-emergence herbicides in winter wheat - Less than 50% control or is not recommended. Populations exist that are resistant to this herbicide and won’t be controlled. 1 Top growth burnoff only, re-growth will occur. Visual weed control ratings: 9 = 90-100%, 8 = 80-89%, 7 = 70-79%, 6 = 60-69%, 5 = 50-59% Crop tolerance ratings: E = Excellent, G = Good, F = Fair, P = Poor R

Weed Management Guide 2018

Table 3. Emerged annual broadleaf weed control ratings for post-emergence herbicides in cereals

Lettuce, prickly

Mustards

Nightshade

Pigweeds

Ragweed, common

Ragweed, giant

Speedwell species

Shepherd’s purse

Sow-thistle

Stinkweed

Thistle, Canada

Velvetleaf

Vetch

Violet, field

Lamb’s-quarters

Lady’s thumb

Hemp nettle

Ground ivy

Fleabane, Canada

Dandelion

Cocklebur

Cleavers

Chickweed

Carrot, wild

Canola, volunteer

Buckwheat, wild

Atriplex, spreading

Red cover underseeded

Crop tolerance

Alfalfa underseeded

Wheat

Rye

Oats

Barley

Mode of action

Herbicide Treatment

Horsetail

Broadleaf weeds

Crop Uses

8 9

8 -

9 9

7 7

9 9

6 8

9 9

8 8

Pre-emergence herbicides (weeds emerged at time of application): Ratings at 4-6 weeks after application Eragon LQ + Merge

√

Pre-emergence herbicides (weeds not emerged at time of application): Ratings at 4-6 weeks after application Focus Treflan Valtera

14,15 3 14

x √ x

x x x

√ √ √1

x x x

G P G

9 9

8 9

7 -

7 8 9

Post-emergence treatments (weeds emerged at time of application): 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 Barricade Boost M co-pack Buctril M (bromoxynil/ MCPA) Estaprop XT (dichlorprop/2,4-D) Enforcer M Infinity Lontrel Lontrel + 2,4-D Lontrel + MCPA MCPA Amine MCPA Ester MCPA Sodium Pardner (bromoxynil) Peak + Pardner Pixxaro co-pack Refine SG Refine M co-pack Simplicity GoDRI Trophy co-pack Tropotox Plus (MCPA/MCPB)

4 4

√1 √1

x x

√ √

√

√ √

x x

G G

9 9

8 8

8 9

7 7

9 9

√

4,4 √ √ 2,2,4,4 √ x 2,4 √1 √

x x x

√ √ √

√ x x

x x x

G E G

9 9

6 9 9

9 9 9

7 7

8 7

9 6

8 9 7

8 6

6 8

9 9

9 9 9

8 9

9 9 9

7 7

9 9 9

8 9 9

9 7

9 9

8 9 9

8 8

6 9 9

8 7

8 8 8

9 6

8 8

√1 √

√

4,6 4

√1

√

4,6,6 27,6 4 4,4 4,4 4 4 4 6 2,4 4,4,4 2 2,4 2 4,4

√ √1 √1 √1 √1 √1 √1 √1 √1 x √ √1 √1 x x

x x x x x √ √ √ √ x x √ √ x x

x √ x √ x √1 x √1 x √1 √ √ √ √ √ √ √ √ x √ x √ x √ x √ x √ x √

x x x x x x x x x x x x x x x

x x x x x x x √ x x x x x x x

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

9 9 9 9 9 6 9 9

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

9 9 9 9 9 9 9 8 9 9 8 9 8 9

7 7 7 8 7 7 -

8 7 8 7 7 8 8

9 8 8 8 8 8 6 6 8 9

8 7 7 7 7 8 9 9 7 9

6 8 8 6 -

8 9 9 9 9 7 8 7 9 6 8

8 7 8 8 9 6 8 -

9 9 7 8 8 8 9 8 9 9 9 8

7 6 8 9 9 9 9 9 8 9 9

9 9 9 9 9 9 9 8 9 7 9 9 9 7

9 9 9 9 9 9 9 9 9 9 9R 9 6 9

8 8 9 9 9 9 8 9 8 9 8

9 9 9 9 9 9 9 7 9 9 8 9 9

9 9 7 9 8 -

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

7 8 9 9 9 8 8 9 7 9

6 9 9 8 9 9 -

9 9 9 9 9 9 9 8 9 9 9 9 9 9

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

9 9 9 9 9 9 9 8 9 9 9 9 9 9

7 9 9 9 8 8 6 7 7 6 8

9 9 8 8 8 8 8 9 9 8 9 -

9 9 9 9 7 7 8 6 9

8 8 6 8 8 -

√

√1 √

√

Other weeds of significance found in cereal crops Weed species

Herbicide name (Rating)

Biennial wormwood

Peak + Pardner (9)

Bur cucumber

Peak + Pardner (7)

Chamomile, scentless

Barricade (8), Boost M (8), Enforcer (8), Refine SG / Refine M (8), Buctril M (6), Estaprop XT (6)

Three-seeded mercury 2,4-D Ester (8), MCPA Amine (8), MCPA Ester (8), Peak + Pardner (8), 2,4-D Amine (7) Waterhemp

PRE: Focus (8), Valtera (8) POST: Infinity (9), Trophy (9)

Weed Management Guide 2018

Table 3. Emerged annual broadleaf weed control ratings for post-emergence herbicides in cereals √ Can be used on this crop. x Cannot be used on this crop. - Less than 50% control or is not recommended. R Populations exist that are resistant to this herbicide and won’t be controlled. 1 Only labelled for use on spring planted varieties. 2 Top growth control only. Visual weed control ratings: 9 = 90-100%, 8 = 80-89%, 7 = 70-79%, 6 = 60-69%, 5 = 50-59% Crop tolerance ratings: E = Excellent, G = Good, F = Fair, P = Poor

CORN | SOYBEANS | Cereals Table 4. Annual grassy weed control ratings for herbicides in cereals

Wild oats

Fowl meadow grass

Foxtails

Chess/cheat

Brome, downy

Bluegrass, annual

Bentgrass, loose silky

Cereal crop tolerance

Red clover underseeded

Grassy weeds (Annual)

Alfalfa underseeded

Wheat

Rye

Oats

Barley

Herbicide Treatment

Mode of action

Crop Uses

Pre-emergence herbicides (weeds not emerged at application): Ratings at 4-6 weeks after application Focus

14,15

√

Valtera

√1

Post-emergence herbicides (weeds emerged at application): Ratings at 4-6 weeks after application Bison 400 L (tralkoxydim)

√1

√

Puma Advance

√1

Simplicity GoDRI

√

Table 5. Weed control ratings harvest aid and post-harvest herbicides in cereals

Pigweed

Plantain, broad-leaved

Ragweed, common

Shepherd’s purse

Violet (pre flower)

Lettuce, prickly

Vetch

Lamb’s-quarter

Sow-thistle, perennial

Horsetail, field

Dandelion

Clover, red

Cleavers

Chickweed

Carrot, wild

Thistle, Canada

Burdock (2nd year)

Bindweed, field

Volunteer cereals

Quackgrass

Wild oats

Chess

Brome, downy

√

Bluegrass, annual

√

Bentgrass, loose-silky

√

Post harvest

Glyphosate (2X rate)

Harvest aid

Glyphosate (1X rate)

Herbicide Treatment

Mode of action

Horse-nettle

Broadleaf weeds (Annual, biennial or perennial)

Henbit

Grassy weeds

Fleabane, Canada

Timing

Glyphosate: Emerged weed control ratings at 4 weeks after application

Herbicides that contain glyphosate: Emerged weed control ratings at 4 weeks after application Enlist Duo

√

Selective Herbicides: Emerged weed control ratings at 4 weeks after application 2,4-D Ester 700

√

Aim EC + Merge

√

Engenia or Xtendimax

√

Eragon LQ + Merge

√

81 61

9,14

√

81 61

√

Eragon LQ + glyphosate Peak 75 WG

Table 4. Annual grassy weed control ratings for herbicides in cereals

Table 5. Weed control ratings harvest aid and post-harvest herbicides in cereals

√ Can be used on this crop. x Cannot be used on this crop. - Less than 50% control or is not recommended. R Populations exist that are resistant to this herbicide and won’t be controlled. 1 Only labelled for use on spring planted varieties. Visual weed control ratings: 9 = 90-100%, 8 = 80-89%, 7 = 70-79%, 6 = 60-69%, 5 = 50-59% Crop tolerance ratings: E = Excellent, G = Good, F = Fair, P = Poor

√ Can be used on this crop. x Cannot be used on this crop. - Less than 50% control or is not recommended. R Populations exist that are resistant to this herbicide and won’t be controlled. 1 Top growth burnoff only, re-growth will occur. Visual weed control ratings: 9 = 90-100%, 8 = 80-89%, 7 = 70-79%, 6 = 60-69%, 5 = 50-59% Crop tolerance ratings: E = Excellent, G = Good, F = Fair, P = Poor

Weed Management Guide 2018

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Always read and follow label directions. BlackHawk 速 is a registered trademark of Nufarm Agriculture Inc. Credit 速 is a registered trademark of Nufarm Limited. 57751-12/17

57751_NFC_2017_BlackHawkEast_7x10.indd 1

2017-12-13 8:36 AM

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As with all crop protection products, read and follow label instructions carefully. Member of CropLife Canada. Unless indicated, trademarks with ®, ™ or

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herbicide