INSECTICIDE SUSCEPTIBILITY OF CYDIA MOLESTA POPULATION IN NORTHERN ITALY

To assess the risk of occurrence of potential cases of lesser sensitivity to some insecticides commonly used against wild populations of Cydia molesta, in Emilia Romagna region (Northern Italy), a multi-year laboratory study was started to measure the efficacy of commercial formulation of triflumuron, etofenprox and thiacloprid. A laboratory reared population of C. molesta, identified as a reference strain was used to estimate a baseline for these products. Then several wild populations, collected from peach orchards in Emilia-Romagna, where bioassayed with the above mentioned products. Trebon, even in such situations where the control with other insecticides was difficult, retains fully its effectiveness and was able to produce on wild populations, mortality rates that are identical and in some cases even better than those obtained with the reference population