Efficacy of Actara((R)) 25WG on three species of Brazilian termite (Isoptera, Nasutitermitinae) crop pests

摘要

The efficacy of thiamethoxam, a new neonicotinoid insecticide used as trade name Actara(R) 25WG, has been tested for the first time on three species of Brazilian termites (Nasutitermitinae): Cornitermes snyderi (Emerson), Syntermes molestus (Burmeister), Nasutitermes costalis (Holmgren) which are pests of important economical crops. Toxicity tests show that thiamethoxam is very efficient against such pest species at very low doses of 0.07g a.i. m(-3) of soil. Excluding Syntermes molestus which consumed the product, thiamethoxam proved to be anti-feedant but not repellent to N. costalis and C. snyderiin feeding deterrence test. For all species studied, mortality was not dependent on. consumption of the product, which acts by contact.