2016 Spring: Western Range & Wildlands Edition by TechLine Invasive Plant News

W e st e r n R a n g e & W i l d l a n d s E d itio n

innovative research, success stories, and tips FOR invasive plant managers

TechLine I n va s i v e P l a n t N e w s

2015 PHOTO CONTEST WINNER

Cynoglossum officinale in flower, by Stacy Davis (Montana State University). See inside cover for details about the 2016 photo contest.

IN THIS ISSUE: Protecting the Highcountry in Southwestern Colorado Oxeye Daisy Identification & Management About TechLine

TechLine Invasive Plant News aims to provide an objective communication tool for on-the-ground natural resource managers who face common management challenges so they may share the successes of their programs and learn from one another. Print newsletters are published twice per year and delivered free of charge. This and past issues can be downloaded from www.techlinenews.com.

Editor, Celestine Duncan Copy Editor/Design, Melissa Munson Circulation, Darby Bramble Learn more: www.techlinenews.com Contact: techlinenews@gmail.com ÂŠ TechLine Invasive Plant News, 2016 Sponsored by DowAgroSciences, LLC

S p r i n g 2016

Proper Application Timing to Maximize Control of Key Invasive Plants Essential Online Resources To Kick Off Your Field Season

Editor’s Notes Gearing Up for Spring When the harsh months of winter have passed and the first spring flowers appear, it is time to gear up for the field season! Updating management plans, hiring and training summer crews, inspecting equipment, and ordering supplies are only part of the tasks that need to be done before managing invasive plants. One of the best ways to accomplish your objectives is to review and implement some of the new research, application techniques, inventory methods and training tools that are available to invasive plant managers. The goal of TechLine Invasive Plant News is to provide you with new resources and ideas to help you get ready for the field season. In this issue you will find information on managing oxeye daisy on western landscapes, calibrating and maintaining herbicide equipment, training tips and tools for new employees, education series on herbicides and nozzles, and much more. Thank you for your dedication and support of invasive plant management. Your continued perseverance and talents are making a difference in protecting and restoring desirable plant communities! -- Celestine Duncan, Editor

Sweepstakes Winnings Help New Mexico Weed Coordinator Expand Reach, Save Time and Money Congratulations to Rebecca Healy for winning TechLine’s $200 sweepstakes. Rebecca is the Noxious Weed Coordinator for the Chaves Soil and Water Conservation District (SWCD) in Roswell, and Hagerman/Dexter SWCD in Hagerman and Dexter, New Mexico. TechLine’s $200 prize will help Healy address equipment limitations for one of their largest annual projects, Russian Knapweed control on the Hagerman Canal. READ MORE about Healy’s program and how she chose to spend her winnings > http://techlinenews.com/sweepstakes

2016 Photo Contest

Send us your best shots of INVASIVE PLANTS and invasive plant MANAGEMENT IN ACTION for TechLine’s 2nd annual photo contest and a chance to win a $200 prize. When to enter: August 15 to October 14, 2016 What to enter: Your original photographs of invasive plants or invasive plant management in action. Why to enter: You’ll win a prize! The winner of each category will receive a gift card to Forestry Suppliers or REI ($200 value). STAY TUNED FOR DETAILS http:// techlinenews.com/photo-contest Subscribe at http:// techlinenews.com/subscribe/ to receive contest updates.

VastlanTM Specialty Herbicide Replaces Garlon® 3A VastlanTM is a herbicide developed by Dow AgroSciences for the control of woody plant species and annual and perennial broadleaf weeds on industrial vegetation management, aquatic, Conservation Reserve Program (CRP), range and permanent grass pastures sites and grasses grown for hay. Vastlan herbicide is formulated as a soluble liquid (SL) and contains 4 pounds acid equivalent per gallon (lbs ae/ gallon) of triclopyr choline. The choline formulation of triclopyr reduced the signal from “Danger” on Garlon® 3A to “Warning”. This reduced toxicity and higher concentration sets Vastlan herbicide apart from its predecessor Garlon 3A. Grass tolerance and weed control spectrum of Vastlan herbicide is the same as Garlon 3A. Vastlan will be commercially available in the spring of 2016. Application Rate Conversion for Garlon® 3A to Vastlan™ Specialty Herbicide Garlon 3A has 3 lb acid equivalent per gallon (ae/gallon) and Vastlan has 4 lb ae/gallon.

Garlon® 3A

VastlanTM

(3 lb ae/gal)

(4 lb ae/gal)

2 pints/Acre

1.5 pints/Acre

3 pints/Acre

2.25 pints/Acre

4 pints/Acre

3 pints/Acre

6 pints/Acre

4.5 pints/Acre

8 pints/Acre (4 quarts)

6 pints/Acre (3 quarts)

Milestone® Specialty Herbicide Label Updates The label for Milestone® specialty herbicide has been updated to include an expanded site listing for use, a new section for spot treatment on small areas, changes to the section on seeding grasses and forbs, and addition of a section on a supplemental label for the control/suppression of medusahead and other winter annual grasses. Download a copy of the new label here: http://bit.ly/techline_labels ®TM Trademark of The Dow Chemical Company (“DOW”) or an affiliated company of Dow. Always read and follow the label directions.

Essential Online Resources for Invasive Plant Managers

Selecting, Maintaining & Calibrating

Protecting the High Country in Southwestern Colorado

Rod Cook

By Celestine Duncan

The rugged San Juan Mountains in southwestern Colorado are well known for their soaring peaks, stunning vistas, and hiking, hunting and wildlife viewing opportunities. The area is also a place where invasion of non-native plants threaten wildlife, watershed, and scenic values. Ron Mabry, Ouray County Weed Manager, and Rod Cook, La Plata County Weed Manager, agree that weeds like oxeye daisy and yellow toadflax have the potential to change the San Juan Mountains forever. Mabry and Cook joined forces in 2007 to encourage other county, state and federal partners to work together as a team to control oxeye daisy and other invasive plants. Their efforts led to the formation of a large-scale cooperative weed management area in southwest Colorado. The San Juan Mountains Cooperative Weed Management Area (CWMA) officially organized in 2014, joining nine counties and multiple agency partners in an effort to manage invasive plants within 5.5 million acres. The purpose of the CWMA is to work cooperatively to inventory, monitor, control, and prevent the spread of noxious/invasive weeds across jurisdictional boundaries. “The CWMA is a living, growing and changing entity with multiple partners committed to controlling invasive plants in the beautiful San Juan’s,” Mabry says. Both Cook

and Mabry agree that by working together the group increased their opportunity to secure grants and can more efficiently put funds onthe-ground. Oxeye daisy (Leucanthemum vulgare) was first reported in the San Juan Mountains in about 1995 along Highway 550. Caye Geer, a cabin owner on Electra Lake, said the weed was seeded on the highway right-of-way as part of a wildflower mix. “I noticed the daisy in the mid-90s and thought how pretty it was. So I dug some up and planted it near our cabin, and others did the same,” explains Geer. “It didn’t take long for us to realize that oxeye daisy was very invasive and spread quickly. I also noticed that the plant was having an impact on native orchids and wildflowers.” Geer and others in the area formed a committee to tackle oxeye daisy and other invasive plants near Electra Lake. Although their local effort continues to be effective, oxeye daisy has spread to infest about 3,000 acres in the Continued on page 4...

Equipment

Tips for Selecting, Maintaining, and Calibrating Backpack Sprayers Learn key features to consider before purchasing a backpack sprayer, maintenance guidelines, and TechLine reader-reviews of backpack sprayer equipment. http://bit.ly/sprayerselection

Selecting ATV or UTV Herbicide Sprayer Platforms for Wildland and Natural Area Management We asked 10 public and private invasive plant management professionals which ATV and UTV herbicide application platforms they recommend and why. Learn about the equipment they endorse based on experience. http://bit.ly/atvutvplatform

Calibration Guidelines for Small (backpack) and Large Volume (ATV-, truck-mounted boom and boomless) Herbicide Sprayers How do I make the most of my herbicide spot treatments? How much herbicide do I put in my tank? The answers to these questions plus step-by-step procedures for calibrating your large and small volume sprayers are included in this article. http://bit.ly/techlinecalibration

Mobile Apps aiding in herbicide application Explore smart phone apps that calculate tank mixes and log application records. http://bit.ly/applicationapps

techlinenews.com | 3

Essential Online Resources for Invasive Plant Managers

Nozzles

Nozzles: Small in Size —Big in Importance. Spray nozzles are an important part of your herbicide application program. There are many different types of nozzles available from manufacturers, and each nozzle can perform differently. Review some guidelines for selecting the proper spray nozzles and operating them effectively. http://bit.ly/nozzletips

Professional insights on sprayer nozzle selection, maintenance, and operation We asked 13 invasive plant management professionals to provide insight and tips on nozzle selection and maintenance based on their field experience. See what the professionals suggest for type and size of nozzles for backpack and ATV/UTV or truckmounted sprayers, supplemental equipment, and best practices for calibrating, maintaining, and replacing nozzles. http://bit.ly/nozzlereview

Understanding Performance of your ATV-Mounted Boomless Spray Nozzles A summary of field studies by Robert Woolf and others at Kansas State University to evaluate the effectiveness of spray nozzles on all-terrain vehicles (ATVs). http://bit.ly/boomless

La Plata County, colorado

NEW ARTICLES ON Herbicide Sprayer THE SAN JUAN MOUNTAIN CWMA ENCOMPASSES 5.5 MILLION ACRES IN NINE COUNTIES IN SOUTHWESTERN COLORADO.

...Continued from page 3

Animas River watershed. Movement by vehicles along infested roadsides, contaminated seed, and intentional planting as an ornamental continue to be the main avenues for spreading oxeye daisy to non-infested areas. In the high mountain environment of southwestern Colorado, oxeye daisy has several bloom cycles and produces seed into late fall. This long bloom period and high seed viability increases the plant’s ability to spread quickly, especially on disturbed sites. Ben Bain, GIS specialist for La Plata County, measured the rate of spread in some areas at about 50 percent per year. [See Oxeye Daisy Biol-

and control invasive plants (See http://bit.ly/ techline_vets). Cook explains, “One of the biggest issues in this area is that there aren’t enough commercial applicators to meet our needs. Our grant included funding to train military veterans in a new career as professional commercial applicators.” The two veterans trained and hired by the CWMA in 2015 spent the summer working on oxeye daisy infestations in the high country of the San Juan Mountains. The U.S. Forest Service and Upper San Juan Weed and Pest District donated trucks, and Rod Cook donated spray equipment to the project.

ogy and Management on page 6].

“Our focus in 2015 was to remove oxeye daisy along roadsides and newly established infestations,” explains Cook. “This will reduce spread and help protect areas that are mostly weed-free.” Herbicide applications were also made to small isolated infestations of other invasive plants such as Canada thistle (Cirsium arvense), musk thistle (Carduus nutans), and yellow toadflax (Linaria vulgaris). The CWMA successfully treated 109 miles of secondary non-paved roads, 24 miles of Highway 550, and about 28 miles of Narrow Gauge Railroad from Rockwood to Silverton with Milestone® specialty herbicide at 5 fluid ounces per acre (fl oz/A). “So far the results the season of treatment look very promising,” says Cook. A unique aspect of the San Juan CWMA is training armed forces veterans to inventory

4 | WESTERN RANGE & WILDLANDS edition. Spring 2016

Public education and outreach is an important component of the CWMA. The LaPlata Conservation District (LPCD) has been an active partner in the CWMA, coordinating grant funds and helping educate the public about invasive plants. “The most important role of our organization is to educate the community about the impact of noxious weeds,” says Tom Hartnett, LPCD president. “A lot of people think plants like oxeye daisy are pretty and dig them up to plant in their lawns. It is important for them to understand the impact of these weeds on elk, other wildlife, and native plants; and how quickly they spread.” Another partner the CWMA hopes to involve is the Mountain Studies Institute (MSI) in Silverton, Colorado. MSI is an independent, not-for-profit, mountain research and

Essential Online Resources for Invasive Plant Managers

Understanding

rod cook

Herbicides

ALEX REA (US COAST GUARD VETERAN-LEFT) AND GLEN SHERIDAN (US AIRFORCE VETERAN-RIGHT) STANDING IN FRONT OF THE TRUCK USED BY THE SAN JUAN MOUNTAIN CWMA.

education center concentrating on environmental issues facing the San Juan Mountains. “It would be great to have research data on the impact of oxeye daisy on our high-elevation native plants and wildlife,” says Cook. Funding for the oxeye daisy project included a $40,000 grant from the Colorado Department of Agriculture. The La Plata Conservation district also received additional funds for noxious weed control. They include a $25,000 grant to cost share weed control projects with landowners in the district, and a $14,000 grant to address local weed issues bordering public lands. Cook and others in the CWMA agree that grant funds are important, but maintaining or increasing county funding is critical for long-term support of sustainable invasive plant management projects. Partnerships formed through the CWMA are critical to managing the large project area. “We appreciate the commitment from La Plata County for facilitating and managing crews, writing grants and mapping weed infestations,” says Mabry. “It takes a team effort to make this work.” Early detection and treatment of oxeye daisy and other invading plants, and long-term sustainable funding are critical to protecting native plant communities in the San Juan Mountains “We can never get back the diversity of native plants and wildlife if we don’t protect these areas from invasive plants now,” says Cook.

Partners and Cooperators • County Weed Districts (La Plata, Ouray, San Juan, San Miguel, Archuleta, Hinsdale, Dolores, Gunnison, and Montezuma Counties) • Conservation Districts (Shavano, San Miguel and La Plata) • Rio Grande Resource Conservation and Development Council • Colorado Department of Agriculture • Colorado Department of Transportation • Colorado Parks & Wildlife

With spring just around the corner, now is the time to improve your skills and expand your understanding of the science behind selecting, applying, and assessing the effects of herbicides. Explore these and more articles with technical and practical information about using herbicides at: http:// techlinenews.com/herbicides Herbicide Education Series

• • • •

Tolerance OF NON-TARGET SPECIES TO HERBICIDE

•

• Colorado Native Plant Society • US Forest Service • Bureau of Land Management • Natural Resource Conservation Service • Mesa Verde National Park • Glacier Club • Purgatory Metro District

• •

®Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow. Milestone is not registered for sale or use in all states. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. Always read and follow label directions.

Native Forb and Shrub Tolerance to Milestone® Herbicide Tolerance of Warm and Cool Season Grasses to Milestone Herbicide Possible Effects of Herbicides to Honeybees

PRODUCT INFORMATION

•

• Durango and Silverton Narrow Gauge Railroad • Numerous private individuals

Effective Herbicide Use Starts With the Label Introduction to Herbicide Formulations Factors Affecting Herbicide Performance Surfactants and Adjuvants

• •

Answers to FAQs about Control of Saltcedar and Russian Olive with Garlon® 3A vs Garlon 4 Ultra Answers to FAQs about Milestone Herbicide Labels, MSDS, and Additional Information

techlinenews.com | 5

Oxeye Daisy

Essential Online Resources for Invasive Plant Managers

Proper Application Timing Maximizes

Invasive Plant Control

CANADA THISTLE

(Cirsium arvense) Late spring and early summer applications of Milestone速 specialty herbicide on Canada thistle should be made after all plants have emerged and basal leaves are expanded. It is better to wait until some of the plants are at the bud growth stage to be sure that all plants are emerged before applying Milestone at 5 to 7 fluid ounces per acre (fl oz/A). Use the 7 fl oz/A rate at later growth stages. http://bit.ly/canadathistle

BIENNIAL THISTLES:

Bull (Cirsium vulgare), musk (Carduus nutans), plumeless (Carduus acanthoides) Milestone at 3 to 5 fl oz/A can be applied in spring and early summer from rosette to early flower growth stage. Use the 5 fluid ounce rate at the late bolt to early flower growth stage. http://bit.ly/biennialthistle

SPOTTED and DIFFUSE KNAPWEED

(Centaurea stoebe and C. diffusa) Milestone at 5 to 7 fl oz/A may be applied any time during the growing season when plants are actively growing. Applications made during the late bud to bloom stage will not stop seed production the year of treatment. http://bit.ly/spottedknapweed

Biology and Management

Terry Spivey, bugwood.org

Spring and early summer can be excellent times to control actively growing invasive plants with herbicides. Applying herbicides to the target plant at the optimum growth stage is important to maximize control. The following guidelines provide information on the best application timing and rate to control key invasive plants.

by Celestine Duncan

OXEYE DAISY in bloom

Oxeye

Lam.) North America from Europe as an ornamental. It is currently found throughout the United States and north into Canada. Oxeye daisy was first reported in the northwestern United States in the late 1800s, and by 1937 had spread to more than half the counties in the region. It is now one of the most prevalent roadside weeds in the Northwest and is listed as a noxious weed in Colorado, Montana, Ohio, Washington, and Wyoming (USDA, NRCS 2015). Oxeye daisy reproduces by seeds and rhizomes. Seed production can be very high with individual plants producing from 1,300 to more than 4,000 seeds. A seed burial study found that 82 percent of seed remained viable after six years, and 1 percent remained viable after 39 years. Creeping rhizomes enable oxeye daisy to form dense patches that reduce native plant diversity and desirable grasses. Cattle avoid grazing the plant, and wildlife such as elk and deer are observed to have a similar avoidance. Dense infestations may increase the potential for soil erosion and reduce the amount of organic matter contributed to soil. The plant is known to infest meadows, native grasslands, pastures, waste areas and transportation rights-of-way. daisy

(Leucanthemum

vulgare

is a perennial forb introduced to

Management

Management of oxeye daisy will vary based on size and location of the infestation. In

6 | WESTERN RANGE & WILDLANDS edition. Spring 2016

early stages of invasion, an aggressive herbicide or hand-control program may need to be combined with practices such as reseeding and/or application of nitrogen fertilizer to improve competitive ability of the desirable plant community. The priority for large-scale infestations should be stopping movement to new sites, controlling small satellite populations with herbicides, containing spread along roadsides and outer edges of the infestation with herbicides, and increasing the competitive ability of desirable vegetation.

HERBICIDES Field studies conducted in four western states (Montana, Idaho, Colorado, and Oregon) and Ontario, Canada looked at effectiveness of various herbicides on oxeye daisy. Herbicide applications were made at the bud to bloom stage. Results of those studies show that Milestone速 specialty herbicide at 4 to 7 fluid ounces per acre (fl oz/A) provides good to excellent control of oxeye daisy for at least one year following treatment. The addition of 2,4-D to Milestone did not improve control over Milestone alone. Metsulfuron at 1 ounce of product per acre provided similar control of mature plants. However, in some studies oxeye daisy seedlings reinvaded within a year after treatment on metsulfuron plots. Shorter soil residual with metsulfuron herbicide compared to Milestone may have allowed seedlings to reinvade. Control with 2,4-D at 2 quarts per acre was poor the season of treatment and one year following treatment.

Essential Online Resources for Invasive Plant Managers

FIGURE. SUMMARY OF SEVEN HERBICIDE FIELD TRIALS CONDUCTED ON OXEYE DAISY IN THE UNITED STATES AND CANADA. PERCENT CONTROL 30-90 AND 365-500 DAYS AFTER APPLICATION (DAA).

Proper timing, continued...

La Plata County, colorado

RUSSIAN KNAPWEED

OXEYE DAISY infestation

Field studies conducted in Washington in the 1970s suggest that the addition of 80 pounds of ammonium nitrate fertilizer per acre in combination with an herbicide treatment could increase long-term control of oxeye daisy. Grass production increased significantly with fertilization thus increasing the competitive ability of the grasses against oxeye daisy reinvasion.

OTHER CONTROL METHODS Hand pulling or grubbing can be effective on small infestations of oxeye daisy, but must be continued until the soil seed bank is depleted. Follow-up treatments that include seeding with desirable species and/or fertilization on sites with low fertility may be necessary to reduce reinvasion potential of oxeye daisy on sites disturbed by hand removal. Mowing before bloom will reduce seed production but will not reduce oxeye daisy populations. Prescribed burning is not effective on oxeye daisy and disturbance caused by fire may increase susceptibility of the site to invasion. There are no biological control agents available for oxeye daisy. Desirable plant competition reduces the invasive ability of oxeye daisy and increases effectiveness of management methods. Practices that increase the competitiveness of desirable plant species and communities such as

nutrient management and critical area planting (for example, after a wildfire) will make the environment less suitable for oxeye daisy survival and spread. With any management method, follow-up monitoring after treatment is important to control seedling populations germinating from the long-lived soil seed bank.

References Crisp D. 2003. Species Management Plan: Oxeye Daisy. [online] Available http://sbsc.wr.usgs.gov/research/ projects/swepic/factsheets/chle80sf_plan.pdf Jacobs J. 2008. Ecology and Management of Oxeye Daisy (Leucanthemum vulgare Lam. NRCS, Montana,Technical Note, Invasive Species, MT-19. [online] Available http://www.nrcs.usda.gov/Internet/FSE_PLANTMATERIALS/publications/ mtpmstn7820.pdf Mangold J, R Sheley, M Brown. 2009. Oxeye Daisy: Identification, Biology and Integrated Management. Montana State University. Bulletin MT 200002 [online]. Available http://store.msuextension.org/publications/AgandNaturalResources/MT200002AG.pdf Mitch LW. 2000. Intriguing world of weeds: Oxeye daisy (Chrysanthemum leucanthemum L.), the white-flowered gold flower. Weed Technology. 14: 659-662. Olson BE and RT Wallander. 1999. Oxeye daisy. In R. L. Sheley and J. K. Petroff, eds. Biology and Management of Noxious Rangeland Weeds. Corvallis, OR: Oregon State University Press. 438 p. USDA, NRCS. 2015. The PLANTS Database (http:// plants.usda.gov, 2 December 2015). National Plant Data Team, Greensboro, NC 27401-4901 USA.

(Acroptilon repens) Applications of Milestone® specialty herbicide at 5 to 7 fl oz/A should be delayed until Russian knapweed has bolted and is in the early bud to flower growth stage; applications can be made through the fall. It is important to remember that herbicide efficacy symptoms do not always show on Russian knapweed the season the treatment is made.

http://bit.ly/russianknapweed LEAFY SPURGE

(Euphorbia esula) The optimum time to treat leafy spurge with most herbicides is at the true flower growth stage, which is after the yellow bract is formed (late spring to early summer). Apply Tordon® 22K specialty herbicide alone at 1 to 2 quarts of product per acre (qt/A) at true flower. When applying Tordon 22K at rates less than 1 qt/A add 2,4-D at 1 qt/A (1 lb ae/A). The addition of OverDrive herbicide at 4 oz/A may improve leafy spurge control by up to 20%. For suppression of leafy spurge on sensitive sites apply a tank mix of 7 fl oz/A Milestone plus 1 qt/A 2,4-D plus 4 oz/A of OverDrive. http://bit.ly/leafyspurge EXPLORE MORE CONTROL RECOMMENDATIONS AT

http://techlinenews.com KNOTWEEDS

http://bit.ly/knotweeds

Woody plants

http://bit.ly/woodyplantcontrol

Hawkweeds http://bit.ly/hawkweeds

common teasel

http://bit.ly/teasel2014 ®Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow. Milestone is not registered for sale or use in all states. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. Label precautions apply to forage treated with Milestone and to manure from animals that have consumed treated forage within the last three days. Consult the label for full details. Tordon 22K is a federally Restricted Use Pesticide. Always read and follow label instructions. techlinenews.com | 7

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c/o Weed Management Services PO Box 1385 Helena, MT 59624

Essential Online Resources for Invasive Plant Managers

Training

Opportunities & Resources Turn Around, Look Around A presentation to use for spring training programs for private, commercial, and government herbicide applicators and staff. The downloadable PDF includes over 40 slides highlighting important guidelines applicators should follow before, during and after herbicide application. bit.ly/turnaroundlookaround Find more resources for your invasive plant manager’s toolbox

techlinenews.com/resources/ V12-000-063 (03/16) 010-51071

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Helena, MT 59601 Permit No. 221

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Prairie and Grassland Management is a new guide that provides a suite of resources to natural resource managers so they can better understand how and when to integrate herbicides into prairie and grassland management programs. The guide includes information on herbicide use rates, herbicide selectivity on desirable forbs and grasses, seeding options and guidelines, invasive woody and herbaceous plant control, and other useful tips. Available online at: techlinenews.com/prairieguide Invasive Plant Management Guide

This guide provides information on selective herbicides as one tool for invasive plant management on rangeland, pastures, and natural areas. Information on herbicide use rates, herbicide selectivity on non-target plants, sprayer calibration, seeding guidelines, environmental considerations, and other useful tips are provided in this document. techlinenews.com/management-guide/

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