Effect of Margosan-O on the development of the leafhopperasymmetrasca decedens |
| |
Authors: | J Meisner M Klein E Ben-moshe |
| |
Institution: | 1. Dept. of Entomology, ARO, The Volcani Center, 50250, Bet Dagan, Israel 2. Dept. of Plant Introduction, ARO, The Volcani Center, 50250, Bet Dagan, Israel
|
| |
Abstract: | The effect of Margosan-O, a formulation of a natural insecticide obtained from the neem (Azadirachta indica A. Juss) tree, on the development of the leafhopperAsymmetrasca decedens (Paoli), was investigated by testing insect performance (i) on cotyledons ofGossypium hirsutum cotton seedlings treated with different concentrations; (ii) on cotton seedlings stood with their petioles in different aqueous
dilutions of Margosan-O and recording mortality until the adult stage; and (iii) determining the repellent effect on adults
by recording their location on treatedvs untreated cotyledons in choice and no-choice situations. In foliar and in systemic treatments with 2% Margosan-O, practically
none of the leafhoppers reached the adult stage. As the concentrations were lowered there was a gradual rise in the percentage
of adults emerging; on untreated cotyledons 60-80% of the adults emerged. Feeding was zero or very low at high Margosan-O
concentrations. Adult leafhoppers settled in significantly higher numbers on untreated than on treated cotyledons in both
choice and no-choice experiments. |
| |
Keywords: | Leafhoppers Asymmetrasca decedens neem Margosan-O systemic effect antifeedant IGR effect |
本文献已被 SpringerLink 等数据库收录! |
|