Effectiveness of some Insecticides for Eggplant Sucking-Piercing Insects Management with Reference to Their Side Effects on Natural Enemies

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Two field experiments were conducted during 2012 and 2013 seasons at Nubarya district, to evaluate one synthetic insecticide, four insecticide alternatives and their binary mixtures against some eggplant sucking insects. The side effect of these insecticide treatments against two predatory insects was also investigated. Results showed that, Admire, Admire-Achook mixture, and Admire-Applaud mixture achieved the highest reduction percentages of whitefly, where mean reduction percentages were 93.4, 91.7 and 93.3% at 2012 and 94.3, 95.1 and 94.1% at 2013, respectively. In the case of aphids, in 2012 and 2013 seasons, the highest reduction percentages were achieved by Admire (98.6 and 98.2%), Kemesol (95.2 and 94.9%), Admire-Kemesol mixture (98.9 and 99.4%), Admire-Achook mixture (98.6 and 99.1%) and Admire-Applaud mixture (96.9 and 95.8%). Concerning jassid, it was recorded that Admire and Admire-Achook mixture treatments achieved the highest reduction followed by Admire-Kemesol mixture. In both seasons, Admire has the highest negative effect on the lady beetle, Coccinella sp < /em>. and aphid lion, Chrysopa spp < /em>. Admire reduced lady beetle by 59.8 and 57.7% in 2012 and 2013, respectively and reduced aphid lion by 25.5 and 22.6% in 2012 and 2013, respectively. On the other hand, Breef oil has the least side effects on the two predators in both seasons. Finally we can conclude that, Admire-Achook mixture can be used for sucking-piercing insects management on eggplant, where this mixture achieved the highest reduction percentages against the insect pests and relative low ones against natural enemies.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.