Abstract
The aim of this research is to determine the effectiveness of a mixture of neem (Azadirachta indica A. Juss.) and tobacco (Nicotiana tabacum L.) as bioinsecticides on the mortality of aphids (Toxoptera citricidus [Kirkaldy, 1907]) and the green scale (Coccus viridis [Green, 1889]). Data were analyze by variance and by Duncan Multiple Range Test (DMRT) at 5 % level of significance. The results showed that the bioinsecticide caused mortality of T. citricidus more than 50 % starting from 24 h after application (HAP) and at the 168 HAP the mortality 96 % to 100 %, not significantly different from the imidacloprid synthetic insecticide and significantly different from the control. The application of the bioinsecticide was less effective against C. viridis. The mortality of C. viridis is significantly different from the insecticide imidacloprid. The application of a bioinsecticide mixture of neem and tobacco extracts was effective against the brown citrus aphid T. citricidus, but less effective against the green scale C. viridis.
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