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2012年49 No.4
Temperature-dependent development and protogyny in Helicoverpa armigera
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Key Words： Helicoverpa armigera，development duration，pupal weight，protogyny
Abstract： in which males emerge before females are protandrous whereas those in which females emerge before males areprotogynous． The former are common but the latter arerare． The growth and development of the cotton bollworm，Helicoverpa aimigera(Hübner)， was systematically investigated at 20，22 and 25℃． The results indicate thatdevelopment time gradually shortened with increasing temperature and differed significantly between females and males． Females were protogynous;emerging before males at all three temperatures． Their earlier emergence was due to a shorterpupal duration．Pupal weight was positively correlated with the duration of larval development．