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马尾松是四川主要用材树种之一,分布在四川盆地及其盆地边缘地带。历年各地马尾松林均在不同程度上遭到松毛虫的危害,大发生的年份,其受灾面积可达100万亩左右,松毛虫是我省林业上的大害虫。过去,主要根据松毛虫种类与寄主的相关性〔2〕、〔4〕,认为马尾松林区的松毛虫种类是马尾松毛虫(Dendrolimus punctatus Walker)。但近年在四川却发现油松毛虫(D.tabulaeformis Tsai et Liu)主要危害马尾松〔13〕。〔14〕,因而,对四川马尾忪林区松毛虫的种类及其分布,在1979—1980年开展了调查研究,现报告如下。
Pinus massoniana is one of the main timber species in Sichuan and is distributed in the margins of Sichuan Basin and its basins. The Pinus massoniana forest around the years are to varying degrees, the damage caused by pine caterpillars, occurred in the year, the affected area up to 100 acres, pine caterpillars is a large pest on the province’s forestry. In the past, mainly based on the species and host pine dependencies [2], [4], that Pinus massoniana pine species is Dendrolimus punctatus Walker. However, it has been found in Sichuan in recent years that D. tabulaeformis Tsai et Liu harms masson pine [13]. 〔14〕 Therefore, the species and distribution of pine caterpillars in the Maweige area of Sichuan Province were investigated from 1979 to 1980 and are reported as follows.