TIME-MORTALITY FOR FRUIT FLIES (DIPTERA: TEPHRITIDAE) EXPOSED TO INSECTICIDES IN LABORATORY

• Autor(a) principal: Raga,A.
• Data de Publicação: 2006
• Outros Autores: Sato,M.E.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Arquivos do instituto biológico (Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1808-16572006000100073
• topic: Insecta; Ceratitis capitata; Anastrepha fraterculus; mortality

ABSTRACT Laboratory trials were conducted to measure the mortalities caused by six organophosphate and two pyrethroid insecticides against Ceratitis capitata (Wied.) and Anastrepha fraterculus (Wied.) adults under two systems: cover sprays and toxic baits. Differences were detected in terms of susceptibility for both fruit fly species to the insecticides. Deltamethrin and fenpropathrin sprayed on the insects presented the lowest lethal times (LT50) for C. capitata (≤ 5.2 min). Among the organophosphates, ethion and malathion were the most toxic to this species (LT50 ≤ 10.2). Fenpropathrin and malathion showed the lowest values of LT50 for A. fraterculus females (3.3 and 4.7 min, respectively) under cover spray. For C. capitata females treated with toxic baits, fenpropathrin and trichlorfon showed the lowest LT50 (< 5.0 min) and chlorpyrifos presented the highest LT50 (65.7 min). For A. fraterculus females, trichlorfon and dimethoate showed the lowest LT50s (7.9 and 8.8 min, respectively). Ceratitis capitata was more tolerant to malathion, chlorpyrifos and dimethoate than