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Herbicide Control of Lygodium microphyllum

EISS 2007. Herbicide Control of Lygodium microphyllum. Jeff Hutchinson and Dr. Ken Langeland University of Florida, Department of Agronomy Center for Aquatic and Invasive Plants. Recommended Herbicides. Wet (water present) 1) Glyphosate 2) Triclopyr.

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Herbicide Control of Lygodium microphyllum

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  1. EISS 2007 Herbicide Control ofLygodium microphyllum Jeff Hutchinson and Dr. Ken Langeland University of Florida, Department of Agronomy Center for Aquatic and Invasive Plants

  2. Recommended Herbicides

  3. Wet (water present)1) Glyphosate2) Triclopyr Dry (no water present)1) Metsulfuron methyl2) Imazapic Site Dependent NOTES: 1) Refer to label prior to herbicide application 2) Use 0.5% non-ionic surfactant (v/v) with all herbicides and mixtures

  4. Mixing Metsulfuron Methyl

  5. Combinations of:1) Glyphosate2) Metsulfuron methyl3) Triclopyr4) Imazapic Tank Mixes

  6. For heavy infestations, tank mixes should not exceed 4% total products. For light to medium infestations, tank mixes should not exceed 2% total products. Need to take into account ca. density of native plants at treatment site. Tank Mixes

  7. Rotation and Tank Mixes of Herbicides  Resistance prevention Metsulfuron Imazapic Imazapyr Imazamox Triclopyr Glyphosate

  8. Non-Target Damage • Expect non-target damage- Depends on Lygodium density • Native ferns • Rare plants

  9. Initial Treatment Follow-up Treatments

  10. Poodle-cut / Spray No poodle-cut / Spray Cut or not cut?

  11. Monitoring / Re-treatment Important • Re-growth occurs quickly following treatment • Treated sites need to be re-visited every 6 months (minimum) • Treat all re-growth

  12. Average Treatment Cost / Ha Cut and Spray (Rodeo) Ground Treatments (ca. $1600+) or $630/acre $100 $200 $400 $600 $800 $1000 $1200 $1400 $1600 Aerial Treatments(ca. $185) or $73/acre Aerial (Escort) Aerial (Rodeo)

  13. Research

  14. 14C Herbicide Translocation Results * * * * * *

  15. Greenhouse Herbicide ScreeningDry Weight Biomass (post-treatment)

  16. Dry Weight Biomass

  17. Field Trial Results (6 months)

  18. Aerial Application - Loxahatchee NWRLygodium microphyllum

  19. Ground Cover

  20. Shrubs / Trees

  21. Conclusions • Herbicides (glyphosate, metsulfuron methyl, triclopyr, and imazapic) are effective • Tank mixes of these herbicides are acceptable, but lower rates should be used in areas of lower infestations • Non-target damage will be unavoidable • Regardless of the herbicide or herbicides used, re-treatment will likely be required

  22. Questions

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