1 / 39

Blair Griffin University of Arkansas Cooperative Extension Service

Pasture And Hay Weed Control. Blair Griffin University of Arkansas Cooperative Extension Service. Forage Weed Control. Herbicide timing for winter/spring weed control Herbicide timing for summer weed control Buckhorn plaintain Woolly croton 2,4-D substitutes. Forage Weed Control.

ganesa
Télécharger la présentation

Blair Griffin University of Arkansas Cooperative Extension Service

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Pasture And Hay Weed Control Blair GriffinUniversity of ArkansasCooperative Extension Service

  2. Forage Weed Control • Herbicide timing for winter/spring weed control • Herbicide timing for summer weed control • Buckhorn plaintain • Woolly croton • 2,4-D substitutes

  3. Forage Weed Control • Appearance

  4. Forage Weed Control • Appearance • Yield

  5. Forage Weed Control • Appearance • Yield • Quality

  6. Forage Weed Control • Appearance • Yield • Quality • Value

  7. Grazing for Weed Control • Small are more palatable • Many weeds have comparable protein levels to forages • Good Fencing and cattle numbers are needed

  8. Mowing • Too late to prevent competition. • No selectivity. • Perennials will re-grow. Multiple sprouts. • May prevent weed seed production. • Consistency is key to effective weed control with mowing.

  9. What is the Economic Threshold? Rule of thumb: When weeds are more than 20% of the pasture. Woolly croton

  10. Forage Weed Problems • Lack of management • Fertility • Lime • Overgrazing • Mowing • No weed control • 5 to 10% of Arkansas pastures sprayed • Lack of weed control knowledge • part-timers • hobbyists

  11. Do I spray or fertilize first? • Spray first. • Control existing weeds. • Begin soil-test based lime and fertilizer program.

  12. Easy broadleaf weeds in grass pastures winter weeds in dormant bermuda Not so Easy summer grasses in bermudagrass broadleaf weeds in legumes sedges fescue in bermudagrass Pasture Weed Control with Herbicides

  13. Pasture Weed Control in Arkansas • Spring application of 2,4-D 1 qt/acre with a cluster nozzle. • Butter cup # 1 problem, blooms in April • 2,4-D provides cheap, effective control • Cluster nozzle works well in windy conditions • Easy on white clover

  14. Broadleaf Weed Control Plenty of Options Timing Application Inexpensive Poor Control Timing Application

  15. Broadleaf Weed Control • Metsulfuron • Ally • Cimarron • Cimarron Extra • Martins Clean Pasture • Patriot • MSF

  16. Winter Weed Control Herbicide Application • Dec – March • Weeds emerge in the fall • Earlier you treat, easier to control weeds • Retreat missed areas • Weather (wind, rain) • Weather Myths (temp, rain) Common Winter Weeds • Buttercup • Thistles • Henbit • Buckhorn Plaintain • Wild Garlic

  17. Spray this size Not this size

  18. Buttercup • Treat when small (2-4”) Dec – March • Usually one flush per season • 2,4-D, Grazon, Weedmaster 1-2 pts/acre • Ally/Cimarron 0.25 oz/acre

  19. Thistle • Late fall or early spring application • Treat at rosette leaf stage • 2,4-D ester - 2.0 qt./acre • WeedMaster - 2.0 pt./acre • Grazon P+D - 2.0 pt./acre Bull thistle Musk thistle

  20. Henbit • Treat Dec - Feb • Cimarron 0.30 oz/ac excellent control (100%) • Grazon P+D 1 qt/ac • GrazonNext 1 qt/ac good control (80-90%) • 2,4-D 1 qt/ac poor control (60%)

  21. Buckhorn Plaintain • Perennial • Emerges in the fall • Rosette stage through the fall and late spring • Flowers in May

  22. Buckhorn PlaintainFall Treatments Treated October 20 • GrazonNext 1 qt/ac • Grazon P+D 1 qt/ac • Weedmaster 1qt/ac • 2,4-D 1 qt/ac • 95-100% control March 20

  23. Buckhorn PlaintainSpring Treatments Treated March 16 • Grazon P+D 1 qt /ac • GrazonNext 1 qt/ac • 2,4-D 1 qt/ac • Weedmaster 1 qt/ac • 90-95% control

  24. Summer Weed Control Herbicide Application • May – July • Multiple flushes • Treat when plants are small • Good soil moisture increases control • Use surfactant • Multiple applications

  25. Bitter Sneezeweed • Apply when 1 to 3 in. tall. • 1-2 pts/acre: • 2,4-D • Grazon P+D • Weedmaster • Cimarron Max 1 pt + 0.25 oz • Cimarron 0.25 to 0.33 oz/ac

  26. Pigweed • Treat when small (2 to 4 inches) early May • Ally/Cimarron/MSM 60 0.25 to 0.33 oz/acre • Grazon P+D, Weedmaster, 2,4-D - 1-2 pts/acre, Cimarron Max 1 pt + 0.25 oz • Germinates all summer. Repeat applications needed.

  27. Pigweed • Multiple flushes • 2 – 3 applications during the summer for adequate control

  28. Horsenettle / Bullnettle • Good control • Cimarron 0.25 oz • 2,4-D 1 -2 qt • Grazon P+D 1 qt • Need 100% control for several years

  29. Woolly Croton • Emerges in early to mid May • Well adapted to both high and low fertility fields. • Drought Stress • Apply herbicides when goatweed is 2– 4” tall

  30. Woolly Croton • Grazon P+D 1 qt/ac • GrazonNext 1 qt/ac • Weedmaster 1 qt/ac • 2,4-D 1 qt/ac • Excellent control (95-100%) • Cimarron/Patriot • Good control (80%)

  31. Cocklebur • Apply when 1 – 3 in. tall • 1-2 pts/acre: • 2,4-D • Grazon P+D • GrazonNext • Weedmaster • Cimarron/Ally 0.25-0.33 oz/ac

  32. Blackberry • Cimarron 0.5 oz/ac • 1% Remedy or PastureGard for spray to wet or 1 qt/ac broadcast • Spray in fall or at full bloom. • Repeat applications needed for complete control.

  33. Pricklypear Cactus Spot treatment • 2% v/v Grazon P+D + 0.5% v/v surfactant in water • 1% Tordon 22K or Surmount + 0.5% v/v surfactant in water

  34. Surmount 2 qts / ac 65 DAT

  35. Greenbriar None of the pasture herbicides are very effective. Repeat applications of Weedmaster at 2 qts per acre provide at least short term control. Add surfactant.

  36. 90 DAT Weedmaster 2 qt / acre

  37. Alternatives to 2,4-D Products with 2,4-D Products without 2,4-D Cimarron/Patriot/Ally Milestone Remedy Pastureguard Pastora • 2,4-D • Grazon P+D • GrazonNext • Weedmaster • Cimarron Max • PasturAll

  38. Combine… • Mowing • Grazing • Fertilization • Herbicides • ……in an integrated approach to weed management

  39. Questions?

More Related