芦芽山保护区红脂大小蠹生物学特性及防治研究

红脂大小蠹(Dendroctonus valens)于1999年首次在芦芽山地区发现危害油松林,1999年9月至2004年12月对本区红脂大小蠹的生物学特性及防治技术进行了研究。结果表明:红脂大小蠹在本区主要以老熟幼虫、二龄以上幼虫及成虫在主、侧根的虫道内或土层中的干基部分越冬。成虫于5月上中旬开始出孔扬飞,6月初开始产卵,初孵幼虫始见于6月中旬,8月上旬为化蛹始期,8月中旬成虫开始羽化,10月上中旬以各种虫态进入越冬状态。卵历期11 d~15 d,幼虫历期45 d~55 d,蛹期11 d~13 d。综合防治方法主要分越冬期防治、危害期防治、利用天敌防治和采取营林措施。

The Biological Characteristics of Dendrocton usvalens and Its Control in Luyashan Natural Reserve

Dendroctonus valens was firstly found in pine forest in Luyashan in 1999.From September in 1999 to November in 2004, we observed and studied its biological properties and control methods.We think that,the insect passes the winter in shotholes bored in main roots and lateral roots or in the soil at the base of the trees,both as a full-grown larva and a 2th larva or above and as an adult.Adults come out hole and fly in early and middle May.The Females lay their eggs in June.Eggs hatch in middle June and pupae develop in early August.Adults begin eclosion in middle August.The insect passes winter as different growth stages.Eggs hatch for 11 or 15 days.Larvae attack for 45 or 55 days.Pupae remain 11 or 13 days.The integrated control methods include winter control,attack-stage control,natural enemy control and afforestation practice control.