论文部分内容阅读
中华草蛉（Ｃｈｒｙｓｏｐａ Ｓｉｎｉｃａ Ｔｊｅｄｅｒ）成虫和幼虫觅食棉 花害虫的卵和１—２龄幼虫，是较有利用前途的天敌昆虫。为了摸清中华 草蛉的生活史和习性，为保护和利用提供依据，我们１９７６—１９７９年在湖南 省常德地区进行了观察，结果是：中华草蛉在湖南一年发生５—６代，成虫 寿命和产卵期长，最长达９３天；世代重叠严重；成虫越冬有兼性滞育，即 秋末冬初气温下降至１９℃，成虫开始变褐色，翌年春末气温升至８—１６℃， 成虫恢复绿色；部分个体发育６代。此外还对中华草蛉捕食伏蚜和斜纹夜 蛾的情况作了观察。
Chrysopa sinica Tjeder adult and larvae foraging for cotton pests eggs and 1-2 instar larvae, the more use of natural enemies of insects. In order to find out the life history and habits of the Chinese cabbage and provide the basis for the protection and utilization, we observed in Changde, Hunan Province from 1976 to 1979. The results showed that the Chinese cabbage was born 5-6 generations a year in Hunan, adults Life expectancy and spawning period, up to 93 days; generations overlap serious; adult overwintering with parturitional diapause, that fall temperatures in early fall and winter to 19 ℃, adults began to brown, the temperature rose to 8-16 ℃ , Adults restore green; some individuals develop 6 generations. In addition, we also observed the situation of the Chinese weed predatory prey on aphids and Spodoptera litura.