Studies On Occurrence And Management Of Some Insect Pests Of Paddy In Kanpur Central Uttar Pradesh

Abstract

Rice (Oryza sativa L.) belongs to genus Oryza of Gramineae family, is the newlinesecond most important single food crop of the world importance and staple food newlinefor nearly half of the world population. It covers 11 per cent of world crop area newlineand is cultivated in more than 214 countries globally. It is providing 20-80% of newlinethe dietary energy in the average daily intake of people in Asia and rice hulls can newlinebe used in manufacture of insulation materials, cement, card board and as litter in newlinepoultry keeping. It is widely grown in tropical and subtropical regions. Rice being newlinethe high yielding cereal crop in the world, is of significant importance for newlinecountries like India, where rapidly increasing population has already out stripped newlinethe available food supplies. The high yield in rice could not be realized due to newlinelarge number of insect-pest attacking rice. Insect-pests are one of the major yield newlinelimiting bio stresses throughout the rice growing countries. Out of 800 insect newlinespecies infesting rice world over, more than 300 species are found in India, and newlineamong them 21 species have been listed as pests. The continuous cropping of newlinepaddy has led to a change in the insect-pest complex with the occurrence of newlineYellow Stem Borer, Scirpophaga incertulas (Wlk.); Leaf Folder, Cnaphalocrosis newlinemendinalis (Guen.); Gundhi bug, Leptocorisa varicornis (Fab.) and Green Leaf newlineHopper, Nephotettix virescens (Dist.). To combat with this problem the present newlinefield investigation entitled, Studies on Occurrence and management of some newlineinsect-pests of paddy in Kanpur (Central Uttar Pradesh) was carried out two newlineconsecutive Kharif, seasons i. e. 2015 and 2016 in Student Instructional Farm of newlineC.S.A.U.andT. Kanpur (U.P.). Keeping in mind the above problem regarding rice newlineinsect-pests, the investigations done with various objectives. The population of newlineStem Borer was found initially low (0.20 and 0.30) during 34th and 35th SW of Kharif, newline2015 and 2016, respectively, which gradually increased and reached at maximum newlinelevel (7.20 % in 2015 and 6.90 % in 2016) during 39th and 39th S