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United States Department of Agriculture

Agricultural Research Service


Location: Invasive Plant Research Laboratory

2013 Annual Report

1a. Objectives (from AD-416):
To utilize Student Conservation Association members to assist in research related to development of weed biological control of invasive weeds

1b. Approach (from AD-416):
Student Conservation Association participants are assigned a variety of projects depending on their experience, interests, and arrival dates. Participants will gain experience with scientists and technicians and will be exposed to various environmental problems and potential solutions

3. Progress Report:
This research directly related to inhouse objective 4 - Conduct risk analysis to determine environmental safety of new and existing potential biological control agents for weeds such as air potato, melaleuca, Brazilian pepper, lygodium, downy rose myrtle, Chinese tallow, waterlettuce and skunk vine. Invasive weeds have invaded the Everglades ecosystem decreasing its biodiversity. Biological controls of these weeds will be developed by the introduction of safe insects that reduce weed vigor. Student interns assisted in laboratory tasks that supported quarantine risk assessment of prospective biological control agents of the invasive weed Brazilian pepper, Schinus terebinthifolius. Specifically their duties included maintaining laboratory colonies of quarantine biological control candidates, propagation of host plants for raising insects and test plants for conducting the experiments. Additionally, the interns assisted in the collection of experimental data and in the data entry of the results. Experimental work included determination of the residual effects of pesticide applications to control the biological control agent, Pseudophilothrips ichini. These results showed that foliage and injected formulations of systemic insecticides controlled populations of this biological control agent for predictable durations. These results will be used post release of this biological control agent to determine their impact on the target weed, Brazilian pepper. Approved biological controls will reduce the health and vigor of these invasive weeds, reduce their damage to natural areas and agriculture, and reduce dependence on synthetic herbicides.

4. Accomplishments

Last Modified: 10/17/2017
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