Slide Presentation

TITLE    (click title to view slides)
Pasture and Hay Field Weed Management

AUTHOR
Dr. Tim R. Murphy
The University of Georgia
Crop and Soil Sciences

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TABLE OF CONTENTS
  1. Pasture and Hay Field Weed Management
  2. Forage Weed Issues
  3. Do I spray or fertilize first?
  4. When do you spray?
  5. Herbicide Options
  6. Herbicide Options (cont.)
  7. Remedy
  8. Remedy
  9. Remedy
  10. Redeem
  11. Redeem
  12. New Products -2005
  13. PastureGard
  14. PastureGard
  15. PastureGard
  16. Reseeding Restrictions - PastureGard
  17. Surmount
  18. Surmount
  19. Reseeding Restrictions - Surmount
  20. Surmount- It’s Good - BUT!!!!!
  21. Grazon P+D
  22. Grazon P+D
  23. Reseeding Restrictions - Grazon P+D
  24. Grazon P+D - It’s Good - BUT!!!!!
  25. Cimarron
  26. Cimarron
  27. Cimarron MAX
  28. Plateau
  29. Newly-sprigged Bermuda
  30. Overdrive - BASF
  31. Summary - Forage Weed Control



SLIDE CONTENTS
  1. Pasture and Hay Field Weed Management Dr. Tim Murphy, Extension Weed Specialist The University of Georgia
  2. Forage Weed Issues Lack of management - fertility, lime, mowing, overgrazing No weed control - only 15% of Georgia pastures are sprayed on annual basis Grazing and haying restrictions Weedy grass control in hay fields and legume tolerance
  3. Do I spray or fertilize first? Spray first Control existing weeds Begin soil-test based lime and fertilizer program Establish legumes after good weed control has been practiced for 1 to 2 years
  4. When do you spray? Winter annuals - henbit, chickweed, buttercups, thistles November through March Summer annuals - spiny amaranth, bitter sneezeweed April through mid-July Perennials growth stage dependent
  5. Herbicide Options 2,4-D dicamba (Vanquish, Banvel) 2,4-D + dicamba (WeedMaster) dicamba+ diflufenzopyr (Overdrive) triclopyr (Remedy) 2,4-D + triclopyr (CrossBow) triclopyr + clopyralid (Redeem) 2,4-D + picloram (Grazon P+D) fluroxypyr + picloram (Surmount) fluroxypyr + triclopyr (Pasturegard)
  6. Herbicide Options (cont.) diuron (Direx, Diuron) metsulfuron (Cimarron) metsulfuron + 2,4-D + dicamba (Cimarron MAX) hexazinone (Velpar) tebuthiuron (Spike) paraquat (Gramoxone Extra) glyphosate (Roundup UltraMax) imazapic (Plateau) (no longer an option)
  7. Remedy 4.0 lbs./gal. triclopyr ester low volatile - but ?????? Excellent on upright blackberry, numerous broadleaf weeds Good on tropical soda apple Fair on horsenettle Poor on pokeweed, honeysuckle, trumpetcreeper Expensive
  8. Remedy Mixes with diesel Remedy 20% + 80% diesel, excellent as basal application for trees < 4 inch DBH, and spot control of pricklypear cactus and palmetto Injurious to clovers Apply to seedling grasses 5 to 6 inches tall or after tiller development
  9. Remedy Grazing and haying restrictions Beef grazing - 0 d Dairy grazing - 14 d Hay - 7 d (all livestock types, except lactating dairy cattle, 365 d) Slaughter - 3 d
  10. Redeem 2.25 lbs./gal. triclopyr amine + 0.75 lbs. clopyralid amine Excellent control aster and legume weeds Rates: 1.5 to 4.0 pts./acre Highly injurious to legumes Alternative to Crossbow, WeedMaster, Grazon P+D
  11. Redeem Beef and other livestock grazing - 0 d Dairy grazing - 14 d Hay - 7 d (all livestock types, except lactating dairy cattle, 365 d) Slaughter - 3 d
  12. New Products -2005 PastureGard - fluroxypyr + triclopyr (Remedy) Broader weed spectrum than triclopyr alone controls annual, perennial, & woody species; enhanced control of blackberry and dogfennel Surmount – fluroxypyr + picloram Broader weed spectrum than fluroxypyr alone controls annual, perennial, & woody species
  13. PastureGard 1.5 lbs./gal. triclopyr ester + 0.5 lbs./gal. fluroxypyr ester Controls numerous brush species and broadleaf weeds. Upright blackberry, sweet gums, Sericea lespedeza, dogfennel, gallberry, rose species, lantana Palmetto and yucca – use 2.0% v/v solution in water Fair control of horsenettle and tropical soda apple
  14. PastureGard Mixes with diesel and other oil carriers PastureGard 50% + 50% diesel, excellent as basal application for trees < 4 inch DBH Injurious to clovers Apply to seedling grasses after tiller development
  15. PastureGard Beef and other livestock grazing - 0 d Dairy grazing – not permitted during the growing season of application Hay – 14 d (all livestock types)
  16. Reseeding Restrictions – PastureGard Cool-season grasses and small grains - 21 days Clover and other legumes – 30 days Other crops – 120 days
  17. Surmount 1.19 lbs./gal. picloram amine + 0.96 lbs. gal. fluroxypyr amine Controls broadleaf weeds, horsenettle, tropical soda apple, and pricklypear cactus. Apply 3 to 4.0 pts./acre for prickly pear cactus in fall months, control is very slow, about 2 yrs. About 30 d residual control Excellent control of upright-growing blackberry (3 to 4 pts./acre)
  18. Surmount Injurious to clovers Apply to seedling grasses or overseeded small grains at tiller growth stage Newly-sprigged bermuda –delay until stolons are 6 inches long Beef grazing - 0 d; slaughter 3 d Lactating Dairy Animals – grazing 14 d; silage 14 d. Hay – 7 d (all livestock types)
  19. Reseeding Restrictions – Surmount Cool-season grasses - 21 days Clovers – 12 months Other legumes – 12 months
  20. Surmount- It’s Good - BUT!!!!! Do not use hay from treated areas for compost or mulch transfer livestock to untreated areas without 7 d cleanout use manure for fertilizing broadleaf crops use in any temporary forage system involving broadleaf crops USE ONLY ON PERMANENT GRASS FORAGE SYSTEMS
  21. Grazon P+D 2.0 lbs./gal. 2,4-D amine + 0.54 lbs./gal. picloram amine Excellent control of broadleaf weeds Excellent on horsenettle and tropical soda apple For horsenettle, use 3 pts./acre at early bloom. About 30 d residual control Fair control of blackberry
  22. Grazon P+D Injurious to clovers Apply to seedling grasses or overseeded small grains at tiller growth stage, 1.5 pts./acre or less Newly-sprigged bermuda – 1.5 pts./acre, delay until stolons are 6 inches long Beef grazing - 0 d Dairy grazing - 7 d Hay - 30 d (all livestock types) Slaughter - 3 d
  23. Reseeding Restrictions – Grazon P+D Cool-season grasses - 21 days Clover - 2 pts./acre or less Fall-seeding permitted if Grazon P+D applied no later than June (4 month plant back) Clover – 2 to 3 pts./acre Spring (Feb. – Mar.) seeding permitted the following spring for applications made no later than Sept. 15 the previous year.
  24. Grazon P+D - It’s Good - BUT!!!!! Do not use hay from treated areas for compost or mulch transfer livestock to untreated areas without 7 d cleanout use manure for fertilizing broadleaf crops use in any temporary forage system involving broadleaf crops USE ONLY ON PERMANENT GRASS FORAGE SYSTEMS
  25. Cimarron 60DF metsulfuron DuPont is phasing out Ally Effective for ‘Pensacola’ bahiagrass, spiny amaranth, curly dock, buttercup, wild garlic control, blackberry Poor horsenettle control Injurious to legumes & ryegrass (4 mo plant back)
  26. Cimarron Now labeled at 0.1 to 1.0 oz. product per acre Use low rates on tall fescue and timothy Do not mix with liquid fert. for bahiagrass control 0 d grazing or haying restriction - all livestock
  27. Cimarron MAX Co-Pack product Metsulfuron 60DF + 2,4-D amine (2.87 lbs./gal.) + dicamba (1.0 lb./gal.) Increases number of broadleaf weeds controlled Use rates 0.25 to 1.0 oz./acre of Cimarron plus 1.0 to 4.0 pts./acre of 2,4-D + dicamba Add nonionic surfactant at 0.25% v/v
  28. Plateau BASF will no longer market to private landowners grass roadsides, wildflowers, noncropland sites WHY??? Economics Low sales,objections to injury Can make more money in other markets
  29. Newly-sprigged Bermuda Direx 4L, Diuron 4L Karmex is not labeled for this use Plant sprigs 2 inches deep Apply immediately after sprigging Use 3.0 to 4.0 pts./acre Not labeled in established bermudagrass Annual grasses and broadleaf weeds
  30. Overdrive - BASF Dicamba + diflufenzopyr Controls broadleaf weeds 0 day grazing or haying restriction Limited data base Primarily will be marketed for rights-of-way use
  31. Summary - Forage Weed Control Know cropping system Use approved cultural practices Identify weeds Select product Follow grazing and haying restrictions Proper application timing