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Safe and Effective Use of Herbicides for Melaleuca Control

Safe and Effective Use of Herbicides for Melaleuca Control. Ken Langeland UF/IFAS Agronomy Department Center for Aquatic and Invasive Plants. Safety Personal protection Environmental Non-target vegetation Wildlife. Effectiveness Application technique Herbicide selection. Eye protection.

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Safe and Effective Use of Herbicides for Melaleuca Control

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  1. Safe and Effective Use of Herbicides for Melaleuca Control Ken Langeland UF/IFAS Agronomy Department Center for Aquatic and Invasive Plants

  2. Safety Personal protection Environmental Non-target vegetation Wildlife Effectiveness Application technique Herbicide selection

  3. Eye protection Personal Protection Equipment Long sleeves Chemical resistant gloves Follow label PPE instructions!

  4. Hack and Squirt Methods Of Application Foliar Cut Stump

  5. Herbicides Used for Melaleuca Control Active Ingredient Brand Name(s) Application Method

  6. Woody Stems Bark Inactive xylem Cambium and phloem Active xylem

  7. Cut Stump Applications • Cut as close to ground as possible • If possible cut stumps level! • Concentrate herbicide just inside bark • Treat entire circumference • Use dyes to keep track of what’s been treated • Treat within 15 minutes of cut

  8. Hack and Squirt • Cut all the way around stem • Cut all the way in to cambium • Apply herbicide to exposed cambium • Use dyes • Treat within 15 minutes of cut

  9. Foliar Application • Mature leaves very leathery • Most herbicides will not penetrate • Surfactants very important

  10. Acute Toxicity The lower the number, the higher the toxicity (i.e., it takes a smaller amount to cause toxicity)

  11. Herbicide Behavior in Soil

  12. Current Control • Aerial w/ 3qt Arsenal + 3qt Rodeo + 4 MSO • Girdle w/ 25% Arsenal + 25% Rodeo, 50% Arsenal • Cut-stump w/ 25% Arsenal

  13. Aerial Herbicide Applications to Melaleuca at TAME Demonstration Sites Estimated percent control

  14. Hack and Squirt Herbicide Treatments at TAME Demonstration Sites Estimated percent control

  15. Cut Stump Herbicide Treatments at TAME Demonstration Sites Estimated percent control

  16. Results: Mortality (%) of melaleuca stumps

  17. Herbicide Treatment Costs ($/acre) for Cut stump (shaded) and Hack and Squirt

  18. Conclusions • Roundup SC best homeowner recommendation • Brush-B-Gon, Brush Killer provide adequate control for homeowners • Arsenal (>25%) provides most consistent results • To minimize non-target damage • Cut close to ground and level • Apply 50-100% Rundup solution • Put enough (?) on • Cost comparison (per gallon) • Arsenal $260 • Garlon 3A $65 • Roundup $20 • Rodeo $40

  19. Slanting cuts reduce control with glyphosate

  20. Cut as short as possible for best control with glyphosate

  21. This is difficult to walk in ------- and dangerous

  22. Non-target damage can be site specific!

  23. Questions?

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