Virtual Hydrilla Field Day 2009


Element 1: Development and testing of new aquatic herbicides

Element 1

Element 1

Dr. William Haller, well known aquatic plant researcher at the University of Florida (UF) and Director of the Center for Aquatic and Invasive Plants, is the coordinator for Element 1, Development and testing of new aquatic herbicides.  Dr. Haller is evaluating EUP (Experimental Use Permit) herbicides for effectiveness on hydrilla and hygrophila.

Agrichemical companies have a renewed interest in developing herbicides for use in aquatic environments. Many of the new products coming to market are reduced-risk pesticides, meaning that these products have low risk or impacts to human health and non-target organisms such as fish, birds, and plants. Reduced risk pesticides also have very low potential for groundwater contamination, lower use rates and low resistance potential, something of utmost importance to aquatic plant managers.

There are two main tasks for Element 1: determining field selectivity, efficacy and water residues of new aquatic herbicides and laboratory/greenhouse screening and preliminary evaluation of potential new aquatic herbicides. Researchers are determining water residues and impacts of new herbicides on target and non-target species in ponds and lakes. Researchers are also investigating the time: rate relationships, selectivity and phyto-toxicity of potential new aquatic herbicides to determine feasibility of further registration.

Since the Hydrilla and Hygrophila Demonstration Project began, two new aquatic herbicides have been approved and several others are in the process of being approved. Having more approved aquatic herbicides allows managers to have more tools for managing problem aquatic weeds.

Station 1 Poster
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Station 1 Poster
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Station 1 Poster
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Next: Element 2 >>
Evaluation of currently registered herbicides