温湿度对昆嵛山腮扁叶蜂的影响

目的]通过研究温度、降水量、温湿度系数与昆嵛山腮扁叶蜂种群动态变化的关系,探索气象因子对昆嵛山腮扁叶蜂发生的影响。方法]在昆嵛山区选取7块标准样地,调查昆嵛山腮扁叶蜂发育期内的温度、降水量和相对湿度以及越冬蛹数量,然后统计分析温度、降水量、温湿度系数与昆嵛山腮扁叶蜂种群动态变化的关系。结果]昆嵛山腮扁叶蜂在生活史的不同阶段所需的温度不同。6、7月份较高的降水量有助于昆嵛山腮扁叶蜂产卵和孵化,较低的降水量有利于其下树入土。同一样地的昆嵛山腮扁叶蜂越冬蛹的数量在不同年份中差异极显著(P<0.001);且所有样地的越冬蛹总量和虫口密度也均达到极显著水平(P<0.001)。昆嵛山腮扁叶蜂的虫口密度与发育期降水量和温湿度系数的年份变化趋势一致,但与温度的年份变化趋势不一致。2011年较低的温度、较高的降水量和温湿度系数造成了昆嵛山腮扁叶蜂的越冬蛹数量增多。结论]低温高湿环境适合昆嵛山腮扁叶峰越冬蛹的生活。气象因子在调控昆翕山腮扁叶蜂的发生方面起着重要的作用,其为森林有害生物生态调控机制的重要组成部分。

The Effect of Temperature and Humidity on Web-spinning Sawflies(Cephlca kunyushanica Xiao)

Objective]The relationship between temperature,rainfall,temperature and humidity coefficient and population dynamics of web-spinning sawflies(Cephlca kunyushanica Xiao)was studied to explore the influence of meteorological factors on the occurrence of C.kunyushanica.Method]Seven permanent plots were selected in Kunyushan Mountains and the temperature,precipitation,relative humidity and the number of overwintering pupas were investigated during their development period.Then,the relationship between temperature,precipitation,temperature and humidity coefficient and the population dynamics in Kunyushan Mountains was analyzedResult]The temperature needed by C.kunyushanica was different at different stages of their life cycle.The higher precipitation in June and July helped C.kunyushanica to lay eggs and hatch,while the lower precipitation was conducive to they fall the trees.The number of C.kunyushanica in one plot was significantly different among years(P<0.001).In addition,the total number and density of the overwintering C.kunyushanica in all the plots investigated were also extremely significant(P<0.001).The year variation of C.kunyushanica was consistent with the year variation of precipitation and humiture coefficient,while not consistent with the year variation of temperature coefficient.In general,lower temperatures,higher precipitation and humidity in 2011 led to an increase number of wintering C.kunyushanica.Conclusion]Low temperature and high humidity environment suits overwintering pupas.Meteorological factor play an important role in controlling the occurrence of C.kunyushanica,which is an important part of the ecological control mechanism of forest pests.