陕西红脂大小蠹天敌种类调查

对陕西红脂大小蠹Dendroctonus valens LeConte危害区的天敌种类调查表明,寄生于红脂大小蠹的病原真菌共有5种,其中幼虫期有头孢霉Cephalosporium sp.、球孢白僵菌Beauveria bassiana和拟卵孢霉Ovulariopsis sp.,成虫期有球孢白僵菌Beauveria bassiana、枝顶孢霉Acremonium sp.、头孢霉Cephalosporium sp.、木霉Trichoderma sp.4种,其中以球孢白僵菌和枝顶孢霉Acremonium sp.的致病能力最为显著。捕食性天敌昆虫主要有西岳蛇蛉Agulla xiyue Yang et Chou、日本弓背蚁Camponotus japionicus Mayr、中华红林蚁Formica sinensis Wheeler、蚁形郭公甲Thanasimus formicarius(L.)及纤细阎甲Platysoma attenuata(LeConte),它们对红脂大小蠹均有较明显的控制作用。寄生性天敌主要有1种寄生蝇和1种茧蜂。

The investigation of natural enemies of Dendroctonus valens in Shaanxi

The natural enemies of Dendroctonus valens LeConte in Shaanxi Province were investigated and the results revealed that are 5 species of pathogenic bacteria species including Beauveria bassiana, Acremonium sp.,Cephalosporium sp., Ovulariopsis sp., Trichoderma sp., Penicillium sp. and Rhizopus sp. which B. bassiana and A. sp. demonstrated a more effective control to adults and larva. There are several predators such as Agulla xiyue, Camponotus japionicus, Formica sinensis, Thanasimus formicarius, Platysoma attenuate with some degree of effectiveness in regulating D. valens. There are 2 parasitism species including parasitical flies and braconid wasps.