Slide Presentation

TITLE    (click title to view slides)
To Mix or Not to Mix: That is the Question? (Tank-mixing Herbicides and Fungicides)

AUTHOR
Eric P. Prostko
Extension Weed Specialist
University of Georgia

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TABLE OF CONTENTS
  1. To Mix or Not to Mix: That is the Question? (Tank-mixing Herbicides and Fungicides)
  2. Why tank-mix agrochemicals?
  3. Spray Volumes and Nozzle Tips
  4. Nozzle Tips
  5. What happens when you mix chemicals?
  6. Antagonism
  7. What do the labels tell us?
  8. Cadre Tank-Mixes
  9. Choices
  10. What have we learned?
  11. Annual Grasses and Select (Jordan et al. 2003. Peanut Science 30:1-7)
  12. Texas panicum control with Cadre/fungicide tank-mixes, 2002 (67 DAT) .
  13. A New Publication (For more specifics)
  14. New POST Labels for 2005
  15. Before spraying...
  16. Mixing Order
  17. Two-Jar Test
  18. Other issues
  19. www.gaweed.com



SLIDE CONTENTS
  1. To Mix or Not to Mix: That is the Question? (Tank-mixing Herbicides and Fungicides) Eric P. Prostko Extension Weed Specialist Department of Crop & Soil Sciences University of Georgia
  2. Why tank-mix agrochemicals? Advantages Increase spectrum of control decrease time and labor cost less vine damage decrease soil compaction Disadvantages Reduced control Increased crop injury Physical incompatibility different spray volumes/nozzle types adjuvant recommendations
  3. Spray Volumes and Nozzle Tips What is the best water volume to use for …….. fungicides herbicides What is the best nozzle to use for…. fungicides herbicides
  4. Nozzle Tips
  5. What happens when you mix chemicals? additive * 1 + 1 = 2 synergistic * 1 + 1 = 3 antagonistic * 1 + 1 = 1 or less
  6. Antagonism Gramoxone Max 8 ozs/A Gramoxone Max 10 ozs/A + Storm (1.5 pt/A) 1 DAT
  7. What do the labels tell us? In most cases, not very much Unclear, vague, and confusing Trial and error Has someone else done it?
  8. Cadre Tank-Mixes
  10. What have we learned? Generally no major problems but….. Impossible to test under all environmental scenarios There are some specific problems
  11. Annual Grasses and Select (Jordan et al. 2003. Peanut Science 30:1-7) More of a problem when applied in 25 GPA than if applied in 10 GPA % of comparisons where control was reduced Kocide, ManKocide, Tenn-Cop = 80% 7-75% reductions in control Bravo and others = 69% 2-60% reductions in control Abound = 60% 5-13% reductions in control Folicur and Tilt did not reduce efficacy
  12. Texas panicum control with Cadre/fungicide tank-mixes, 2002 (67 DAT) . LSD 0.05 = 20 LSD 0.10 = 17
  13. A New Publication (For more specifics) Tank Mixing Chemicals Applied to Peanut Crops: Are the chemicals compatible? June 2004 Regional publication housed at NCSU (AGW-653) Available on-line at: http://www.peanut.ncsu.edu/ag653.pdf
  14. New POST Labels for 2005 Strongarm 24c label in GA No fungicide tank-mix information Cobra Label says do not tank-mix
  15. Before spraying….. Read label Water volume compatible for both Nozzle type Contact county agent Check for physical compatibility Jar test
  16. Mixing Order some water (1/2) + agitation water soluble packets wettable powder in slurry DF or WDG liquid flowables EC NIS/COC/AMS/UAN Remaining water (AMS then glyphosate)
  17. Two-Jar Test 1 pt of carrier (water) to each of 2 qt jars ¼ teaspoon of compatibility agent to 1 jar Blendex (Helena) Mix (Drexel) Unite (Loveland) To each jar, add required amount of pesticide in order suggested previously. Shake well after each addition. After all have been added, shake for 15 seconds and let stand for 30 minutes
  18. Other issues Adjuvants How is fungicide formulated? How bad are the weeds? What about ….. insecticides fertilizer 3 or 4 way mixes
  19. www.gaweed.com