柞褐野螟生物学特性与抗寒性的研究

采用林间调查和室内饲养的方法研究了曲阜市孔林内柞褐野螟的生物学特性,并运用SCP测定系统测定了越冬幼虫的过冷却点、结冰点。结果表明:柞褐野螟在山东省1年发生1代,以老熟幼虫在表层土壤内或枯枝落叶间结茧越冬,各虫态发生很不整齐;当年9月到翌年4月间,过冷却点和结冰点随温度降低而降低,随温度的升高而升高,均呈现一定滞后性,但两者变化幅度不同。

Studies on Biological Character and Cold Resistance of Sybrida Fasciata Butler

The biological character of Sybrida fasciata Butler was studied by investigating in the Cemetery of Confucius in Qufu and breeding in the laboratory,and the super-cooling point and freezing point of overwintering larvae were mensurated by SCP system.The results showed that Sybrida fasciata Butler had one generation every year in Shangdong province,and hibernated as a cocoon in the surface soil layer or among the deadwood and defoliation.But the states of the insect were very untidy.From September to the next April,the super-cooling point and freezing point of larvae went up or down with the change of temperature,and both presented some bysteresis.But their ranges of variation were different,and the change of super-cooling point was more remarkable than the later.