PARENT SESSION
PW7 - Biotransformation / Metabolisms / Degradation
Wednesday, 20 November 2002
8:00 AM to 6:30 PM
Exhibit Hall
(P802) Dissipation of Termiticides Under Simulated Conventional and Monolithic Slab Foundations.
Ingram, Reba*,1, Armbrust, Kevin1, Jarratt, James2, Davis, Keith3, 1 Mississippi State Chemical Laboratory, Mississippi State, MS, USA2 Mississippi State University, Mississippi State, MS, USA3 Mississippi Department of Agriculture and Commerce, Mississippi State, MS, USA
ABSTRACT- The dissipation of termiticides from soil under simulated conventional foundations and/or monolithic slabs was measured over a period of one to ten years. Several pyrethroids, organophosphorous insecticides, and a nicotinic insecticide were applied at recommended label application rates to the foundations. Soil beneath conventional foundations was treated with bifenthrin, cypermethrin, fenvalerate, permethrin, chlorpyrifos, and isofenphos while soil beneath slabs was treated with bifenthrin, chlorpyrifos, deltamethrin, and imidacloprid. Soil samples were collected at various intervals from the time of application to one or ten years respectively from underneath monolithic slabs or conventional foundations. In general, the pyrethroids were the most stable compounds in these investigations at the end of one year, followed by chlorpyrifos. Isofenphos and imidacloprid degraded quickly with half-lives of less than 90 days.
Key words: termiticides, dissipation, soil