An Environment Friendly Pest Management Strategy through Biorational Insecticides against Amrasca Devastans Dist. on Brinjal Crop
An Environment Friendly Pest Management Strategy through Biorational Insecticides against Amrasca Devastans Dist. on Brinjal Crop
Muhammad Shoaib Saleem*, Muhammad Faheem Akbar, Amjad Sultan and Saqib Ali
ABSTRACT
A field study was carried out in the experimental field of Department of Agriculture and Agribusiness Management, University of Karachi to evaluate the efficacy of Neonicotinoids and Insect growth Regulators (IGRs) against jassid (Amrasca devastans Dist.) on eggplant crop. The crops were grown in a Randomized Complete Block Design (RCBD) with three replications, each have five treatments inclusive of control. The recommended doses of Nitenpyram, Clothianidin, Momentum (combination of Nitenpyram+Chlorfenapyr) and Buprofezin were applied when population of insect pests reached at economic threshold level (ETL). Pre-treatment data were taken before 24 hours and post-treatment data were recorded after 24, 72, 168 and 336 hours of each spray. In this manner the data of three sprays were collected. Amongst neonicotinoids Clothianidin was found to be very effective with 84% reduction in jassid population even after 7 days of application, followed by Nitenpyram 71% and Momentum 67%, while buprofezin showed moderate effectiveness with 65% reduction. The mean data of three consecutive sprays after 14 days, revealed that the effectiveness decreased with the time increased of all the insecticides (Clothianidin> Nitenpyram> Monetum) 61, 59 and 52 % respectively, as compared to Insect Growth Regualtor (IGR) buprofezin which showed less reduction (44 %) in jassid population.
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