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| Effects of Some Botanical Oils for the Control of Onion Thrips (Thrips Tabaci Lind.; Thysanoptera: Thripidae). |
Wessal Y. H .A, Hassan O. K., Ammar M.S. Abdalla
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Abstract:
The field experiment was carried out in two successive seasons (2006/2007-2007/2008) in Gezira State. The experiments aimed at studying the efficacy of some botanical oils including sesame, cotton, groundnut and sunflower oils on thrips, Thrips tabaci (Lind.) population compared to the standard commercial insecticide Karate 5% EC (lambda-cyhalothrin)..The results indicated that all botanical oil treatments were apparently very effective against the onion thrips compared to the untreated control. Significant differences in the number of insects were encountered on onion plant in both seasons 2006/07, 2007/08. Sesame oil was found to be more effective in controlling the pest followed by groundnut oil, cotton oil and sunflower oil, respectively. The oil treatments decreased thrips population within 2-7days.The data revealed that the best performance of the tested oils was obtained when the higher concentrations were administered in all treated plots. Karate treatment gave the best control of onion thrips and this was reflected in the high percentage mortality
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