Bioecology and Management of Major Insect Pests of Rice in West Bengal

West Bengal is considered a large producer state of rice in India with an output nearly 55.48% total crop production Bengal. In Bengal, has grown three different cropping seasons such as Aus (autumn rice), Aman (winter rice) and Boro (summer contributing about 20.69% to the net State Domestic Product (SDP). Rice hampered by many biotic stresses mostly stem borers [Scirphophaga incertulas (Walker, 1863), Sesamia inference 1856), Chilo polychrysus (Meyrick, 1932), suppressalis(Meyrick, 1863)] leaf folder [Cnaphalocrocis medinalis (Guenee, 1854)], plant hoppers [Nilaparvata lugens(Stal, 1854), Sogatella furcifera (Horvath, 1899)], [Nephotettix virescens (Distant, 1908), Nephotettix nigropictus (Stal, 1870)], hispa [Dicladispa armigera (Olivier, 1808)], bugs [Leptocorisa acuta (Thunberg, 1783), Leptocorisa oratorius (Fabricius, 1794), Brevennia rehi (Lindinger, 1943)], gall midge [Orseolia oryzae (Wood-Mason, 1889)], etc. Demographic parameter shown that pests are greatly affecting host either caused directly creating dead heart (DH), hopperburn, onion leaf, silver shoot during stages harvesting or indirectly transmitting grassy stunt virus (RGSV), ragged (RRSV), tungro viruses (RTV), bacilliform (RTBV) resulting 9.5% loss. For minimize infestation farmers use varieties which provide resistance effect pest population. controlling population chemical insecticide [e.g. fipronil, acephate, monocrotophos] exhibit good results against pests. Beside those other techniques including using biological biochemical pesticides [neem oil, karanj mahua conidial suspension M. anisopliae], pheromones [(Z)-11-hexadecinal, (Z)-9-hexadecenal], allomones [5: 1 mixture 2-(E)-octenyl acetate octanol 3-octenal], cultutal methods [synchronized planting, trap etc.] effective for The ecology based sustainable management species will support E 3 strategy [Ecosystem service-based ecological engineering (ESS-EE-EPM)] successful cultivation near future.