枸杞储藏害虫印度谷螟生物学生态学特性研究初报

Preliminary Study of Biological and Ecological Characteristics of Medlar Storage Pest Plodia interpunctella

通过对危害储藏枸杞的印度谷螟（Plodia interpunctella）生物学生态学特性的试验观察发现，在常温仓储条件下的越冬幼虫死亡率高达86．3％，仅11．1％可化蛹，羽化为成虫．18～22℃时印度谷螟成虫、卵、幼虫、蛹的发育历期分别为8．8，9．8，39．4，8．8d，完成1代需要66．8d．枸杞干果含水量与幼虫发育历期呈反比，与蛹的发育历期呈正比．卵、幼虫、蛹、成虫及1个世代的发育起点温度分别为12．9，8．8，11．9，12．5，11．2℃，有效积温分别为59．7，481．5，130．4，62．8，692．3d·℃．印度谷螟在银川地区可发生的理论代数为2．67代，与实际饲养观察的年发生世代基本吻合．

Biological and ecological characteristics of endangering medlar storage pest Plodia interpunctella were observed in laboratory. The results show that overwintering larva death rate was up to 86.3 %, only 11.1% pupation and eclosion as adult on condition of normal temperature; at 18 -22 ℃ adult, egg, larva, pupation of Plodia interpunctella upgrowth history were 8.8,9.8,39.4,8.8 d respectively, 66.8 d was needed for completing one generation; water content of dry medlar was reverse ratio with larva upgrowth history, and the direct ratio with pupation upgrowth history; developing initiation temperatures of egg, larva, pupation, adult, one generation were 12.9,8.8,11.9,12.5, 11.2 ℃ respectively, effective accumulated temperatures were 59.7,481.5, 130. 4,62.8,692.3 d ·℃ respectively; the theoretical generation was 2. 67 probably in Yinchuan, it was basicly coincidence with the practical observation of breeding generation annually.