Vol. 4, Issue 5 (2019)
Time oriented mortality of brown planthopper, nilaparvata lugens by some new chemistry insecticides
Author(s): Masum Sardar, Mst Rokeya Khatun, Khandakar Shariful Islam, Tazmul Haque, Mahbuba Jahan
Abstract: This experiment was conducted at the net house and laboratory to evaluate some new chemistry and conventional insecticides against Brown Plant Hopper (BPH), Nilaparvata lugens of rice. Insect pests are mainly controlled with synthetic insecticides over the last 50 years and Bangladesh is not beyond in that but the audacious uses of these insecticides make this insect stronger to combat with these chemicals and in addition these chemicals have negative effects on non-target organisms, including humans and the environment. So the main purpose of this experiment is to find out the appropriate chemicals among many ones and handover it to the farmers for the ultimate control of Nilaparvata lugens with less disturbing the ecosystem. Here six insecticides viz., Thiamethoxam & Chlorantraniliprole, Imidacloprid, Fenitrothion, Diazinon, Carbofuran and Azadirectin were used and their efficacy against brown planthopper, N. lugens were determined on the basis of mortality percentage of brown planthopper at 24, 48 and 72 hours after treatment. The findings of these experiments indicate that the chemicals namely Fenitrothion, Imidacloprid, Thiamethoxam & chlorantraniliprole and Carbofuran are the promising options in reducing brown planthopper population successfully but among them the insecticide Fenitrothion was highly effective against the pest resulting in 100% mortality. The insecticides Imidacloprid, Carbofuran and Thiamethoxam & Chlorantraniliprole showed identical efficacy while Diazinon and Azadirectin were less effective against brown planthopper.