1 / 34

Issues in Weed Management, 2004

Issues in Weed Management, 2004. Fabián Menalled Cropland Weed Specialist 719 Leon Johnson Hall Montana State University menalled@montana.edu 406-994-4783. Issues in Weed Management, 2004. Weed Science at MSU Herbicide Resistance Herbicide Update. Cropland Weed Management Web Site.

ginger-hale
Download Presentation

Issues in Weed Management, 2004

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. Issues in Weed Management, 2004 Fabián Menalled Cropland Weed Specialist 719 Leon Johnson Hall Montana State University menalled@montana.edu 406-994-4783

  2. Issues in Weed Management, 2004 • Weed Science at MSU • Herbicide Resistance • Herbicide Update

  3. Cropland Weed Management Web Site http://scarab.msu.montana.edu/cropweeds/index.htm Google: Cropland + weed + Montana

  4. Weed Management Handbook Available: December 2004 On-line Extension Publications Montana State University P.O. Box 172040 Bozeman, MT 59717-2040 406-994-3273

  5. Issues in Weed Management, 2004 • Weed Science at MSU • Herbicide Resistance • Herbicide Update

  6. Herbicide Resistance • Innate ability of a species to survive and reproduce after treatment with a dose of herbicide that would normally be lethal

  7. Idaho Prickly lettuce Kochia Russian thistle Wild Oat Italian ryegrass Mayweed chamomile Wyoming Kochia Italian ryegrass North Dakota Kochia Green foxtail Wild oat Redroot pigweed Wild mustard E. black nightshade Utah Kochia Herbicide Resistance

  8. Herbicide Resistance • Selection intensity • Herbicide efficacy • Number of herbicide applications / year • Weed biology • Genetic variability • Reproduction mechanism • Genetics of resistance • ALS or ACCase vs. EPSP synthase

  9. Resistance Management • ROTATE!!!!! • Management practices • Crops • Herbicides with different SITE OF ACTION

  10. Herbicide Mode of Action • Sequence of events from absorption of the herbicide into the plant until the plant dies

  11. Absorption Movement Contact Toxicity Herbicide Mode of Action

  12. Mode of Action (Amino Acid Biosyntehsis Inhibitors) Site of Action (EPSPS inhibitor) Chemical Family (Glyicines) Active Ingredient (Glyphosate) Commercial Products (Roundup, Ultramax, etc.)

  13. Herbicide Mode of Action

  14. Weed Management in Montana • Based on few HMOA • Amino acids biosynthesis inhibitors (Roundup and the Sulfonylureas) • Growth regulators (2,4-D, MCPA) • ACCase inhibitors (Holeon and Achieve )

  15. Issues in Weed Management, 2004 • Weed Science at MSU • Herbicide Resistance • Herbicide Update

  16. Herbicide UpdateFamiliar Faces, New Names

  17. Herbicide UpdateFamiliar Faces, New Names • WideMatch, Dow AgroSciences • Osprey, Bayer • Silverado, Bayer • Olympus, Bayer • Durango & Glyphomax XRT, Dow AgroSciences • Velpar Alfamax, DuPont

  18. WideMatchClopyralid/MCPA ester + fluroxypyrCurtail + Starane • Growth regulators • Wheat, durum, oat, barley • Broadleaf control: Canada thistle, wild buckwheat, ALS-resistant and large kochia. • Tank-mixed: Achieve, Discover, Everest, Puma • Three-leaf stage to flag leaf emergence • Rate: 1.0 to 1.3 pt / A • Rotation: 18 months for pea, lentil, and potato • Cost: approximately $7.50 to $8.00/A

  19. OspreyMesosulfuron-methyl • ALS-inhibiting herbicide • Winter wheat • Wild oats, Persian Darnel, ryegrass and certain broadleaf weeds • Control ACC-ase resistant grasses (wild oat) • Emergence to jointing stage • Rate: 4.45 oz / A + adjuvant • Flathead and Lake Co. Restrictions! • Tank-mixed: Curtail, Harmony, Bronate Advance, etc. • Rotation: 7 days for wheat; 90 days for lentils, peas and dry beans; 12 months for corn

  20. SilveradoMesosulfuron-methyl • ALS-inhibiting herbicide • winter and spring wheat, including durum • Wild oat control in Eastern Montana • ACC-ase-resistant wild oats • Emergence to jointing stage • 1.75 -2.25 ounces / A + adjuvant • Tank-mixed: MCPA ester, Harmony Extra, Curtail, etc • Rotation: 7 days for wheat and barley; 90 days for lentils, peas and dry beans; 12 months for corn • Cost: $8.75/A + the adjuvant

  21. OlympusPropoxycarbazone-sodium • ALS-inhibiting herbicide • spring, durum and winter wheat • Cheat grass, downy brome, Japanese brome. Suppression of jointed goatgrass • Control ACC-ase resistant grasses (wild oat) • Emergence to jointing • 0.6 to 0.9 oz./acre in a single application • Tank-mixed: Amber, MCPA, Starane, 2,4-D, etc. • Rotation: 4 months for Proso Millet, 22 months for corn • Cost: Approximately $ 9.00 / Acre

  22. Durango & Glyphomax XRTGlyphosate • EPSP inhibitors • Glyphosate stewardship guidelines

  23. Velpar – AlfamaxDiuron and Velpar (hexazinone) • Established alfalfa • Contact and residual control • One single application during winter • Rates = 3.3 – 10 Acres / Unit Pack (14.2 pounds), • Mustards, pigweed, chickweed, common lambsquarters • Branyardgrass, cheatgrass • Dry bulk fertilizer may be coated with Velpar - Alfamax • Caution: can damage trees and shrubs

  24. Section 24(c). Special Local Needs

  25. ALWAYS READ THE LABEL!!!!!!!!

More Related