06-08-2013, 04:59 PM
Evaluation of an insecticide schedule on the incidence of white fly, Bemisia tabaci (Genn.) and yellow vein mosaic in tomato
ABSTRACT
The efficacy of insecticides against whitefly, Bemesia tabaci Gennadius (Hemiptera : Aleyrodidae) in tomato was evaluated at the University Research Farm, Division of Entomology, Main Campus Chatha, Jammu during 2010. Studies conducted for management of whitefly revealed that combination of carbofuran (soil application) + imidacloprid (seed treatment ) + imidacloprid (spray) was found significantly superior and recorded maximum reduction in whitefly population followed by imidacloprid (seed treatment) + thiamethoxam (spray), imidacloprid (seed treatment) + imidacloprid (spray), imidacloprid (seed treatment) + dimethoate (spray), carbofuran (soil application) + malathion (spray), and imidacloprid (seed treatment) + yellow sticky traps. The highest cost benefit ratio of 1:25.04 was recorded in case of carbofuran (soil application) + imidacloprid (seed treatment ) + imidacloprid (spray) followed by 1:22.38 for imidacloprid (seed treatment) + thiamethoxam (spray) ; 1:21.81 for imidacloprid (seed treatment) + imidacloprid (spray); 1:19.27 imidacloprid (seed treatment) + dimethoate (spray); 1:19.48 carbofuran (soil application) + malathion (spray), and 1:8.33 for imidacloprid (seed treatment) + yellow sticky traps. The soil application of carbofuran + seed treatment with imidacloprid and three spray of imidacloprid at fortnight interval starting 40 days after transplanting is advised for whitefly management in tomato.