2012 Annual Report
Conventional fruit fly control methods such as bait sprays, male annihilation, and ground treatments rely heavily on organophosphate insecticides. Continued registration of many organophosphate insecticides for use in the U. S. is in doubt. A current example is the loss of diazinon as a ground treatment for fruit flies. Previously, ARS and Washington State University WSU Scientists conducted laboratory soil treatment studies of the following non-organophosphate products for three species of fruit flies (Mediterranean fruit fly (MFF), oriental fruit fly (OFF), and melon fly (MF)): Admire (Imidacloprid), Regent (fipronil), Force (Tefluthrin), Platinum (Thiamethoxam), and Warrior (Lamda Cyhalothrin). These insecticides were compared to Diazinon Ag 500. Force and Warrior were the most promising insecticides for all 3 fruit fly species. Regent was a good control for OFF and MF. Admire and Platinum were good controls for MFF and OFF. In the present study scientists from ARS, Hawaii, Florida Department of Agriculture and WSU scientists are doing additional studies of six promising compounds: Warrior II (Lambda-Cyhalothrin), Gardstar (Permethrin), Cyazypyr (Cyantraniliprole), Entrust (Spinosad), Intrepid 2F (Methoxyphenocide) and Radiant (Spinetoram) in the laboratory for replacement of diazinon against MFF, OFF, and MF. The efficacy of the test compounds will be compared to that of Diazinon Ag 500. Subsequently field plot efficacy tests will be conducted. These studies are important to fruit fly area-wide suppression/eradication programs worldwide.