Field and laboratory experiment was conducted in Krishi Vigyan Kendra, Tinsukia, Assam during 2014-16 to investigate the peak period of moth emergence, fecundity, egg viability, egg parasitism in different generations of plassey borer, Chilo tumidicostalis and factors influencing the extent of carryover of the pest from one season to another. The pest completed five generations in a year. The average fecundity of C. tumidicostalis ranged between 88.0 to 136.0 eggs in different generations, the maximum being recorded in fifth generation during the 1 st and 2 nd week of October and the minimum in the second generation during the 1 st and 2 nd week of June. The emergence of moths in each generation continued for more than one week (7-12 days), but the maximum emergence of moths took place within a week. The maximum moths (56%) were observed to be emerged during second generation. Late harvesting of crop after second week of March made emergence easy for the moths which would lay eggs on the ratoon sprouts, October planted crops and late tillers that remained un harvested in the fields. The population of winter brood through late tillers would also contribute to the extent of carryover of the pest to the succeeding crop.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.