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小菜蛾是我省十字花科蔬菜重要的鳞翅目害虫,在我国南方诸省为害也十分猖獗。1973～1975年我所在杭州通过室内复式生活史饲养及杭州郊区笕桥公社井岗山大队对500亩左右十字花科蔬菜综合防治区试验结果,明确小菜蛾一年发生9～14代,世代重叠严重,各虫态四季俱存,无滞育、冬眠现象。在7月底8月初平均气温28℃～30℃时,发生一代仅9～10天,
Plutella xylostella is an important Lepidoptera pest of cruciferous vegetables in our province, and is also rampant in the provinces of southern China. From 1973 to 1975, Hangzhou, where I live, reared through the indoor multi-life history and the Jinggangshan Brigade in Baqiao, a suburb of Hangzhou, conducted test on about 500 mu of comprehensive cruciferous vegetables prevention and control zone. It was clear that the diamondback moth occurred 9-14 generations a year, All the insect states all year round, no diapause, hibernation phenomenon. At the end of July the beginning of August the average temperature of 28 ℃ ~ 30 ℃, the generation of only 9 to 10 days,