松叶小卷蛾生物学特性及防治试验

Biological Characteristics of Epinotia rubiginosana and Control Methods Concerned

松叶小卷蛾在桥山林区1年发生1代,以幼虫在地表层土壤中越冬。其主要危害生长衰弱的油松林分,在同一林分中,阳坡危害重于阴坡;郁闭度小的林分重于郁闭度大的林分;上坡位危害大于中坡位大于下坡位;生长势弱林分危害重于生长势旺盛的林分。在不同油松林分中多种药物不同时期防治试验,应急控制单叶危害期可采用50%DDV乳油500倍液、50%杀虫净+柴油500倍液、50%久效磷乳油+柴油的2 000倍液防治幼虫效果好,粘叶危害期可采用50%杀虫净+柴油1 000倍液、50%久效磷乳油+柴油2 000倍液、甲基-1605乳油2 500倍液防治效果好。

Epinotia rubiginosana occurs in Qiaoshan only one generation in one year and spends over winter in the form of larva and mainly attacks the weak Chinese pines.Within a stand,the damage is much severer in sunning slope or on upper position of slope.The sand with smaller canopy density or with lower vigor suffers severer damage.For different stands of Chinese pines at different periods,pesticides like 50% DDV at 500-fold of dilution;50% kothrin＋diesel at 500-fold of dilution;50% monocrotophos＋ diesel at 2000-fold of dilution proves effective in emergency control and prevention.At sticking period,50% kothrin＋diesel at 1000-fold of dilution,50% monocrotophos＋ diesel at 2000-fold of dilution,and methyl parathion at 2500-fold dilution are effective in control.