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One of the Most Serious Vegetable Production Problem in Texas

WEED CONTROL!. One of the Most Serious Vegetable Production Problem in Texas. HERBICIDES CLASSIFIED BASED ON TIME OF APPLICATION. Preplant Preplant Incorporated Preemergence Postemergence Post-transplant. Preplant.

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One of the Most Serious Vegetable Production Problem in Texas

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  1. WEED CONTROL! One of the Most Serious Vegetable Production Problem in Texas

  2. HERBICIDES CLASSIFIED BASED ON TIME OF APPLICATION • Preplant • Preplant Incorporated • Preemergence • Postemergence • Post-transplant

  3. Preplant Any treatment of soil, seed, or reproductive vegetable material before the crop is planted

  4. Preplant Incorporated Any treatment of soil, seed, or reproductive vegetable material before crop is planted and soil incorporated

  5. Preemergence Any treatment made at planting or after a crop is established but before it emerges or before weeds emerge

  6. Postemergence Any treatment made after the crop or the weeds emerge from the soil

  7. Post-Transplant Application made after seedlings have been transplanted into a field, irrespective of the weed stage

  8. GOAL OF ANY EFFECTIVE WEED CONTROL PROGRAM IS TO REDUCE OR ELIMINATE THE WEED SEED BANK

  9. Weed Management Approaches • Prevention • Eradication • Control

  10. Prevention Stopping a weed species from contaminating a field

  11. Contamination or Introduction of New Seed • Birds and animals • Contaminated crop seed • Transplants • Irrigation water • Farm machinery

  12. 2. Eradication The complete elimination of all living weed plants, plant parts, and seed from a field

  13. 3. Control The process of limiting the economical impact of weeds

  14. Major Methods Of Weed Control • Mechanical • Cultural • Biological • Chemical

  15. SYSTEMS APPROACHToWEED CONTROL

  16. Mechanical Control • Cultivation • Mulching • Solarization • Flooding • Flaming • Mowing

  17. Keys To Successful Cultivation • Proper Equipment & Adjustment • Proper Depth • Root pruning can be more detrimental than weed presence • Timing

  18. Timing Critical period for weed control in a cropping seasonis the first 40 days.

  19. Timing Preplant Irrigation / Cultivation • Bed land up 2-3 weeks prior to planting • Irrigate • Cultivate emerging weeds (prior to 2-3 true leaf stage)

  20. Timing Stale Bed Culture • Similar to preplant irrigation/cultivation except is done well advance of planting or on fallow fields • Spray with a PRE herbicide, or systemic (Roundup) after weeds emerge and don’t disturb soil until planting (min. disturbance at planting also suggested)

  21. c. Solarization

  22. Cultural Control • Smother Crops • Competitive Crops • Crop Rotation • Allelopathy • Beneficial Animals

  23. a. Smother Crops

  24. b. Competitive Crops

  25. c. Crop Rotation

  26. d. Allelopathy

  27. e. Beneficial Animals www.ethicurean.com/2007/09/25/lagier-ranch/

  28. e. Beneficial Animals Goats in Hollywood

  29. CHEMICAL WEED CONTROL

  30. Importance ofEfficient Herbicide Use Few product available Few new products New products very costly Environmental concerns & use regulations

  31. Success Of Chemical Weed Control • Determined by: • How well label is read • How well the ‘use pattern’ is followed

  32. Keys To Good Chemical Control • Well Prepared Seed Beds • Free from clods • Free plant residue • Good Soil Moisture • Uniform and Thorough Coverage • Good Incorporation (if required)

  33. REMEMBER!CHEMICAL WEED CONTROL • Is only as good as: • the applicator • the application equipment • the chemical applied

  34. Show examples of home herbicides

  35. Reminder: Dry Material • 1 tbsp is equal to 3 tsp • 1 cup is equal to 16 tbsp or 48 tsp Liquid Material • 1 gal is equal to 128 fl.oz. • 1 fl.oz. is equal to 6 tsp • 1 tsp is equal to 5 ml

  36. Useful websites Web Soil Survey • http://websoilsurvey.nrcs.usda.gov/app/ Home Use Pesticide Database: • http://wsprod.colostate.edu/cwis487/hup/Browse.aspx Biorationals Pesticide Database: • http://attra.ncat.org/attra-pub/biorationals/biorationals_main_srch.php?

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