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大袋蛾(Crgptothelea variegateSnellen)是多种林木的主要害虫,近年来在各地危害都很严重。我们拟通过对大袋蛾空间格局的研究,提出正确的抽样方法,以估测林间害虫的种群密度,为更好的指导生产防治提供依据。现将1987年于树木落叶后在郓城县河庄林场研究结果报告如下。
Crgptothelea variegateSnellen is a major pest of many tree species and has been harmed in many places in recent years. We intend to study the spatial pattern of the giant-bagged moth by proposing the correct sampling method to estimate the population density of the forest-borne pests and provide a basis for better guiding the prevention and control of the production. Now in 1987 after deciduous trees in Tancheng County Zhuang forest farm results are as follows.