Effect of soil type and exposure duration on mortality and transfer of chlorantraniliprole and fipronil on Formosan subterranean termites (Isoptera: Rhinotermitidae).
The uptake and potential transfer of chlorantraniliprole and fipronil by the Formosan subterranean termite, Coptotermes formosanus Shiraki, was investigated in the laboratory by using donor-recipient model bioassays. Two different types of substrates, sandy loam soil (18.6% organic matter) and sand (0.19% organic matter), were used to evaluate how these treated substrates impact the direct mortality and transfer efficiency of the two nonrepellent termiticides tested at different concentrations. Chlorantraniliprole exhibited a more delayed mortality on termites than fipronil in sand. In soil, chlorantraniliprole did not cause higher mortality to either donor or recipient termite at any of the tested concentrations during a 21-d test period when compared with controls. Compared with the controls, a greater number of donors died in the soil treated with fipronil at 14 h postinteraction, and higher death of recipients occurred at 21 d but only in the 60-ppm concentration tested. Our data showed that chlorantraniliprole performed best in substrate with low organic matter against
Department of Entomology, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, USA.
Bal K
BK
Gautam
Gregg
G
Henderson
D000818:Animals; D001522:Behavior, Animal; D007306:Insecticides / Q000378:metabolism / Q000633:toxicity*; D020049:Isoptera / Q000187:drug effects*; D011720:Pyrazoles / Q000378:metabolism / Q000633:toxicity*; D012822:Silicon Dioxide / Q000737:chemistry; D012987:Soil / Q000737:chemistry*; D013997:Time Factors; D062367:ortho-Aminobenzoates / Q000378:metabolism / Q000633:toxicity*
D007306:Insecticides; D011720:Pyrazoles; D012987:Soil; D062367:ortho-Aminobenzoates; C517733:chlorantranilipole; D012822:Silicon Dioxide; C082360:fipronil