Field Evaluation of Some Non-Conventional Pesticides on Faba Bean Leaf Miner and Associated Parasitoids

Abstract

field experiment was conducted to evaluate the efficiency of some non-conventional pesticides against the leaf miner, Liriomyza trifolii (Burgess) and its parasitoids on faba bean plants from November 2013 to March 2014. There were seven treatments viz, Beauvaria bassiana (biopower), diathane-M45, mineral oils (KZ and Kappi), (ethanol and ethyl acetate extracts of casuarina leaves) and untreated control.. The results showed that, amongest the pesticides tested, Biopower 1.15%wp significantly reduced larvae population of leafminer by 83.54 and 79.48% mean percent mortality after the first spray and the second spray, respectively. Followed by ethanol extract of casuarina (63.51 and 60.49%). The rest of the treatments viz diathane M-45 (64.62 and 18.30), KZ oil (26.9 and 7.48%), also effective in minimizing the pest population after the first and the second spray application, respectively. Parasitoid species reared from larvae of L.trifoli werei, Diglyphus isaea (Walk.), D.crassinveris (Erdos.), Chrysocharis sp., Neochrysocharis sp. and Hemiptarsenus sp. (Hymenoptera: Eulophidae). Significantly higher seed yields were recorded from biopower, Diathane and ethanol casuarina leaves extract plots as compared to yields from KZ oil, ethyl acetate extract, kappi oil and untreated control .