油松球果小卷蛾生物学特性及综合防治技术研究

Biological Characteristics of Gravitarmata margarotana and Integrated Control Techniques Concerned

油松球果小卷蛾是油松球果的主要害虫。通过对该虫生物学特性及防治技术研究表明,该虫在陕西秦岭林区1年发生1代,从老熟幼虫离开球果,吐丝坠地,在枯枝落叶层、杂草丛中及松土层内结茧化蛹越夏越冬。幼虫于5月上旬开始危害,取食嫩梢表皮、针叶及当年生球果,2 d后蛀入先年生球果隐蔽生活,取食果鳞基部和种子。采取林业防治、人工防治和药剂防治等综合技术措施,取得较好的防治效果。

Gravitarmata margarotana is the major pest attacking the seeds of Pinus tabulaeformis.Study on the biological characteristics of Gravitarmata margarotana showed that it occurred in one generation in one year.Mature adult leaves the cone and drops to the ground through silk generated by itself.It spends over winter with pupa cocoon in the letter and weeds.In the early of May,larva begins to feed on bark of tender shoot,leaves and cones.Two days after,it gets into the cone and feeds on seeds.Management practice and manual work as well as the chemical spray will perform better in control of it.