Efficacy of spinosad, imidacloprid, indoxacarb and chlorantraniliprole on Tuta absoluta and two species of parasitoid wasps
2022
Ashtari, Sedigheh
AbstractTomato leaf miner is one of the new and important pests of tomato in Iran and every year it reduces the yield and quality of the product in terms of marketability. Therefore, in order to use insecticides that are safer for the environment, consumers and natural enemies, in this study, the effect of spinosad, imidacloprid, indoxacarb and chlorantraniliprole insecticides on Tuta absoluta was evaluated under field conditions. This study was performed in a randomized complete block design with five treatments, one control and three replications. The results of this study showed that the efficacy of chlorantraniliprole and spinosad was higher than indoxacarb and imidacloprid on the third, seventh, tenth and fourteenth days after spraying. Also, the effect of LC25 of each of the mentioned insecticides on the parasitism rate of tomato leaf miner moth eggs by two species of parasitoid wasps T. brassicae and Trichogramma evanescens was evaluated under laboratory conditions. The rate of reduction of parasitism in spinsad, imidacloprid, indoxacarb and chlorantraniliprole treatments for T. brassicae was 23.73, 18.31, 14.58 and 9.37%, respectively, and for T. evanescens 24.02, 18.65, 13.78, 9.75% was determined. The results showed that chlorantraniliprole was less toxic compared to other compounds studied for parasitoid wasps and compared to other insecticides, the rate of parasitism of two species of Trichogramma was less affected. Hence, its use in integrated pest management programs of T. absoluta is recommended.
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