Combining Different Control Tactics to Reduce Hydrilla Biomass James Cuda, Jennifer Gillett-Kaufman, William Overholt, Karen Stratman, Raymond Hix, Eutychus Kariuki, Judy Shearer, Emma Weeks, Joan Bradshaw, Ken Gioeli, Verena-Ulrike Lietze, Elroy Timmer University of Florida, Florida A&M University, COE-ERDC, Citrus & St. Lucie Co. Extension, Aquatic Vegetation Control USDA NIFA RAMP Grant 2010-02825 2014 Aquatic Weed Control Shortcourse, Coral Springs, FL, 5-8 May 2014
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Combining Different Control Tactics to Reduce Hydrilla Biomass
James Cuda, Jennifer Gillett-Kaufman, William Overholt, Karen Stratman, Raymond Hix, Eutychus Kariuki, Judy Shearer, Emma Weeks,
Joan Bradshaw, Ken Gioeli, Verena-Ulrike Lietze, Elroy Timmer
University of Florida, Florida A&M University, COE-ERDC, Citrus & St. Lucie Co. Extension, Aquatic Vegetation Control
USDA NIFA RAMP Grant 2010-02825
2014 Aquatic Weed Control Shortcourse, Coral Springs, FL, 5-8 May 2014
Outline
• Background on hydrilla
• Options for hydrilla management
• Overview of Hydrilla IPM RAMP
• Introducing the new IPM model
• Current status of research
• Summary and resources
USDA NIFA RAMP Grant 2010-02825
Outline
• Background on hydrilla
USDA NIFA RAMP Grant 2010-02825
Hydrilla, Hydrilla verticillata
• Leaves – small (max. 4/5 inch long, 1/6 inch wide), lanceolate, in whorls of 3-8
• New shoot tips breeding sites for hydrilla tip miner
• Damage kills growing tips & increases susceptibility to infection by Mt
Integrating BioControl Agents with Herbicides
• Must confirm that herbicide does NOT negatively impact biocontrol agents – Directly- Causes mortality – Indirectly- Herbicide reduces plant density (= food
source) below critical level
• Consider applying herbicides to maximize impact of biocontrol agents (tip miner & Mt) – Location – Timing
Outline
• Background on hydrilla
• Options for hydrilla management
• Overview of Hydrilla IPM RAMP
• Introducing the new IPM model
• Current status of research
USDA NIFA RAMP Grant 2010-02825
Compatibility Studies
Replicated Tank Tests Conducted in Lewisville, TX & Vicksburg, MS
• “Are we as a weed science discipline choosing to ignore true integrated solutions to the herbicide resistance problem?”
• “More research on herbicide alternatives is required.”
• “Combinations of a diversity of tactics in [ IPM ] systems augment herbicide-based weed control . . . and lengthen the useful life of valuable herbicide tools.”