Recommended
Recommended
More Related Content
Similar to Understanding the Active for Weed and Brush Management - James Jackson
Similar to Understanding the Active for Weed and Brush Management - James Jackson (20)
Recently uploaded
Recently uploaded (20)
Understanding the Active for Weed and Brush Management - James Jackson
- 1. Consumer & Professional Solutions Understanding the Active for Weed and Brush Management James Jackson Range and Pasture Specialist 1
- 2. Consumer & Professional Solutions Weed Management Expected Response to weed control • Native Pasture: 1lb grass grow/lb. of weed controlled • Improved pasture: 7 lbs. of grass grown/1 lb. of weed controlled
- 3. Consumer & Professional Solutions Treatment Dry Matter Lbs./Acre No Fertilizer 1990 (Dry Year) 1991 (Wet year) Grass Weeds Grass Weeds Early Herbicide 1,330 202 4,987 0 Late Herbicide 477 377 4,898 1,266 Shredding weeds 341 761 4,787 998 Control, no weed control or fertilizer 377 1,127 1,385 4,252 Does Grass respond to weed control
- 4. Consumer & Professional Solutions Treatment Dry Matter Lbs./Acre With Fertilizer 1990 (Dry Year) 1991 (Wet year) Grass Weeds Grass Weeds Early herbicide 2,142 209 8,323 0 Late herbicide 881 333 7,610 1,494 Shredding weeds 577 1,078 5,089 2,208 No weed treatment, fertilizer only 645 1,698 2,587 7,452 Does Grass respond to weed control
- 5. Consumer & Professional Solutions Timeline of Herbicide Development For Rangeland Use 2,4-D 1942 Diesel 1930’s Dicamba 1958 Picloram 1960 1961 Clopyralid Tebuthiuron 1970 Glyphosate 1971 Triclopyr 1975 Metsulfuron 1983 2005 Aminopyralid Rinskor 2020 Aminocyclopyrachlor 2020 2020 Indaziflam
- 6. Consumer & Professional Solutions Residual Activity for Actives for Broadleaf Weed Control • 2,4-D-No residual • Dicamba-Short-term residual • Metasulfuron-methyl-Mid-term residual • Aminopyralid-Long term residual • Picloram-Long term residual
- 7. Consumer & Professional Solutions Active Overview for Weed Control • 2,4-D • Works great on easily to control annuals • State restrictions • Deep rooted perennial weeds can be challenge
- 8. Consumer & Professional Solutions Active Overview for Weed Control • Dicamba • State and federal restrictions • Short term residual 14 days (approximately) • Easily controls annuals and good activity on perennials broadleaf’s • No manure or compost concerns • Short-term residual (approximately 14 days) • Commonly combined with 2,4-D and sold as Weedmaster or 2,4-D + Dicamba
- 9. Consumer & Professional Solutions Active Overview for Weed Control • Metasulfuron methyl • Primary active on broadleaf weeds • Short term residual (approximately 30 days in residual) • Only sold in WG formulations • No manure or compost restrictions • No state or federal restrictions • Sold as Escort, Cimarron, MSM 60 and others
- 10. Consumer & Professional Solutions Active Overview for Weed Control • Picloram • Very active on deep rooted broadleaf weeds • Very slow in translocating within the plant • Federally restricted active • Commonly mixed with 2,4-D for weed use • Long lasting soil activity • Sold as Gunslinger P+D and Triumph 22K 10
- 11. Consumer & Professional Solutions Active Overview for Weed Control • Aminopyralid • Very fast translocation within the plant • No state or federal restrictions • Very active on thistles and perennial weeds • Long lasting soil activity • Manure and compost concerns • Commonly mixed with 2,4-D • Sold as Gunslinger AMP and GrazonNext HL 11
- 12. Consumer & Professional Solutions Scenario 1. Want to control easily annual weeds very low budget and has a private applicator license Primary weeds: Broomweed Western ragweed Croton Solutions: 2,4-D Sold as 2,4-D LV6 and 2,4-D Amine 12
- 13. Consumer & Professional Solutions Scenario 2. Wants to control annuals and perennial broadleaves has slightly larger budget and need no activity in manure or compost would prefer short term residual Primary Weeds: Broomweed Western ragweed Marshelder/Sumpweed Giant ragweed Solutions: Weed master or Dicamba+2,4-D 13
- 14. Consumer & Professional Solutions Scenario 3. Want to control all weeds and annual and perennial willing to spend some money and not concerned about any manure or compost issues want longest residual possible Primary Weeds: Western ragweed Giant ragweed Silver leaf nightshade Carolina horse nettle Solutions: 2,4-D and Picloram or 2,4-D and aminopyralid Sold as Gunslinger P+D and Gunslinger AMP 14
- 15. Consumer & Professional Solutions Soil fertility-Missouri Study Key Questions: Are overall weed infestation levels associated with specific nutrient and/or soil pH levels in pastures? Could they identify any specific weed-nutrient and/or weed pH relationships? Source: Dr. Kevin Bradley, University of Missouri
- 16. Consumer & Professional Solutions Methods Survey conducted in Missouri Pastures at 14-day intervals throughout each season (April-Oct) 1, representative 20-m2 Sampling area was surveyed per 10 acres of each pastures
- 17. Consumer & Professional Solutions Soil fertility-Missouri Study • 37 of 46 (80%) pastures surveyed were classified as having low or very low soil P levels • 17 of 46 (37%) of pastures surveyed were classified as having low or very low soil K levels • Average soil pH in the pastures surveyed was 5.8 • Optimum nutrient uptake occurs at 6-7
- 18. Consumer & Professional Solutions Soil fertility-Missouri Study Based on a survey of 46 Missouri pastures in 2015-2016: • A 1-unit increase in soil pH corresponded to ~4,100 fewer weeds per acre • Each 0.1 ppm unit increase in P and K corresponded to 162 and 12 fewer weeds per acre, respectively.
- 19. Consumer & Professional Solutions Influence of Select Soil and Forage Properties on Weed Density in Missouri Pastures
- 20. Consumer & Professional Solutions Influence of Select Soil Forage Properties on Weed Density in Missouri Pastures
- 21. Consumer & Professional Solutions Seasonal Distribution of Weed Species in Missouri Pastures (results based on an average of 46 pastures surveyed in 2015-2016)
- 22. Consumer & Professional Solutions Typical timeline of Emergence of Some common Summer Annual Pasture Weeds
- 23. Consumer & Professional Solutions Economic Comparison: Mechanical vs. Chemical $3.79/acre difference!!
- 24. Consumer & Professional Solutions Actives for Brush Control • Picloram • Triclopyr • Clopyralid • Fluroxypyr • Tebuthiuron • Hexazinone
- 25. Consumer & Professional Solutions Active Overview for Brush Control • Triclopyr • Commonly used for mesquite and other woody plants • Very likely to drift when used in ester formulation • No state or federal restrictions • Can be applied to leaves or stem • Sold as Triclopyr 4 and Remedy Ultra 25
- 26. Consumer & Professional Solutions Active Overview for Brush Control • Clopyralid • Very active on legumes • Mesquite and Honey locust • Can have compost and manure concerns • No state or federal restrictions • Sold as Sonora herbicide 26
- 27. Consumer & Professional Solutions Active Overview for Brush Control • Fluroxypyr • No state or federal restrictions • Can be used as an unrestricted product on prickly pear • Very expensive active • Sold as Flagstaff • Paired with triclopyr and sold as Clear graze or PastureGard HL 27
- 28. Consumer & Professional Solutions Considerations for Brush Control • Tree species • Tree size • Tree density • Size of area to be treated • What around the area to be treated 28
- 29. Consumer & Professional Solutions Tree Species • Mesquite and Honey Locust-Clopyralid • Juniper-Picloram • Hackberry- Picloram • Elm-Combination of Picloram and Aminopyralid 29
- 30. Consumer & Professional Solutions How to estimate brush density • Calculate brush density in multiple areas of your pasture • Calculate an average brush density for your pasture • Determine the cost of broadcast treatment per acre • Is your cost for IPT greater than the cost of broadcast treatment? 66 ft. 66 ft.
- 31. Consumer & Professional Solutions 31 Individual Plant Treatment • Must have plants where you can get good coverage • Typically less than 6 feet • Works well for area with low density • Works well for small area with high density • Typically highest mortality rating
- 32. Consumer & Professional Solutions • Cost approximately $6.00 per acre • Will need access to property • Tank capacity up to 2400 gallons • Best control over GPA and droplet size Ground Application
- 33. Consumer & Professional Solutions • Cost $15.00-$17.00 per acre • Will need access to property • Tank capacity 100 gallons • Acres per tank 20-25 • Ability to be more selective • More control over GPA Rotary Wing (Helicopter)
- 34. Consumer & Professional Solutions • Cost approximately $8.50 per acre • Will not need access to property • Tank capacity up to 800 gallons • Less control over GPA Fixed Winged (Airplane)
- 35. Consumer & Professional Solutions What's Around the Area to be treated 35 Area to be treated Cotton Vineyards
- 36. REM-1466 • Extension’s Chemical Weed and Brush Control Recommendations • Used by NRCS as technical reference guide for cost share programs
- 41. Consumer & Professional Solutions 41
- 42. Consumer & Professional Solutions Happy Spraying James.Jackson@alligare.com
Editor's Notes
- Max ac about 20-25. 100 gal tank