Baseline data of four insecticides with different modes of action for Anastrepha fraterculus (Wiedemann) and Ceratitis capitata (Wiedemann).

CARRIZO, BEATRIZ; PÁEZ-JEREZ, PAULA; RUIZ, M. J; JUÁREZ, M. L.; MÉNDEZ, DANIELA; TOLABA, GEORGINA; MILLA, F.; TAPIA, SILVIA; VERA M. T.; DE LA VEGA, M. H.

Simposio; Reunión del grupo de trabajo Moscas de la Fruta del Hemisferio Occidental; 2016

The Mediterranean fruit fly, Ceratitis capitata (Wiedemann) and the SouthAmerican fruit fly, Anastrepha fraterculus (Wiedemann) are major economicimportance pests in Argentina and worldwide. One method to control them is theuse of insecticide in sprays or baits. The repeated use of a particular product exerts astrong selection pressure and can lead to the development of resistance. The aim ofthis study was to determine baseline data of four insecticides with different actionmechanisms through laboratory bioassays. The products used were commercialformulations of cyantraniliprole, chlorpyrifos, lambdacyalothrin and spinosad. Thelethal concentration which kills 50% of the individuals (LC50) was estimated with adose-response curve analysis. Between six and seven concentrations were evaluatedfor each product. In each replicate 10 individuals of each sex were evaluated foreach concentration and between three to four replicates for each product wereperformed. Cyantraniliprole and chlorpyrifos were equally susceptible for malesand females of both species. For lambdacyalothrin differences between the twospecies were detected. For this product, the LC50 of A. fraterculus was significantlylower than that of C. capitata indicating that A. fraterculus is more sensitive to thiscompound than C. capitata. These results generate reference values for Argentinathat will contribute as baseline for field surveys of natural populations on whichchemical control is exercised. It also provides valuable information at the time ofchoosing active ingredients and rotation schemes.