Selecting insecticidal active ingredients against brown plant hopper (Nilaparvata lugens Stal.) damaging rice plants (Oryza sativa L.) with high efficinecy

Abstract

    The study was conducted with the goal of identifying a highly effective insecticide against brown planthopper (Nilaparvata lugens Stal.) damaging rice (Oryza sativa L.). The experiment was designed in laboratory by a completely randomized design with one factor and 5 treatments, treatment 1: Control (no insecticide), treatment 2: Imidacloprid, treatment 3: Nitenpyram, treatment 4: Pymetrozine, treatment 5: Triflumezopyrim.  Each trial the study was repeated with a 15-day-old rice pot, and 10 brown planthoppers at age 2 were released into each experimental rice pot after the rice was soaked with chemicals. The active ingredients to control planthoppers were diluted with water, while the control group was treated separately with water. The entire rice plant was soaked in the solution containing the active ingredients to control planthoppers for (10-15) seconds according to each experiment. After soaking, the pot was placed back and the rice plant was allowe to dry (usually in (10-15) minutes). The number of surviving brown planthoppers was counted and recorded after (1, 2, 3, 4 and 5) days of release. The research results showed that the active ingredient Triflumezopyrim was the most effective in controlling brown planthoppers that were harmful to rice plants, as compared to Imidacloprid, Nitenpyram and Pymetrozine.