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本文报道了我国最严重的森林害虫———松毛虫种间杂交试验的研究结果。研究表明，马尾松毛虫（ＤｅｎｄｒｏｌｉｍｕｓｐｕｎｃｔａｔｕｓＷａｌｋｅｒ）、油松毛虫（ＤｅｎｄｒｏｌｉｍｕｓｔａｂｕｌａｅｆｏｒｍｉｓＴｓａｉｅｔＬｉｕ）、赤松毛虫（ＤｅｎｄｒｏｌｉｍｕｓｓｐｅｃｔａｂｉｌｉｓＢｕｔｌｅｒ）、落叶松毛虫（ＤｅｎｄｒｏｌｉｍｕｓｓｕｐｅｒａｎｓＢｕｔｌｅｒ）相互间都可以进行杂交，亲缘关系较近。其中，油松毛虫和赤松毛虫分别与马尾松毛虫进行杂交，无论正交或反交都可以产生有生育力的Ｆ１代，Ｆ１代自交产生Ｆ２代，证明在它们之间不存在生殖隔离。另外，油松毛虫、赤松毛虫和马尾松毛虫分别与落叶松毛虫的种间杂交也能进行，并产生Ｆ１代杂种松毛虫，但在人工饲养条件下幼虫死亡率高，经过多年反复试验，均未能完成Ｆ２代。另外，还对其形态学特征和染色体进行了初步研究。研究结果表明，赤松毛虫、油松毛虫和马尾松毛虫确系同一物种，但由于长期适应不同的生态环境，相互间的形态及生物学特性已有一定程度的差异，根据动物学命名法的有关规定，我们认为油松毛虫和赤松毛虫应分别定名为马尾松毛虫地理亚种，即油松毛虫（Ｄｅｎｄｒｏｌｉｍｕｓｐｕｎｃｔａｔｕｓｔ?
This paper reports the results of the study on interspecific hybridization of pine forest, the most serious forest pest in our country. Studies have shown that Dendrolimus punctatus Walker, DendrolimustabulaeformisTsaietLiu, Dendrolimus spectabilis Butler, and Dendrolimus pubesutus can hybridize with each other and the genetic relationship is relatively close. Among them, the oil pine caterpillars and red caterpillar dendrolimus were respectively mixed with Dendrolimus punctatus, fertile F1 generation can be generated either in the cross or in the cross, and the F1 generation self-cross F2 generation, demonstrating that there is no genital isolation between them. In addition, the oil pine caterpillars, red caterpillar pests and Dendrolimus punctatus, respectively interspecific hybrids with the larch caterpillars can also be carried out, and produce F1 hybrids dendrolimus, but under artificial feeding conditions larvae mortality is high, after years of repeated tests, both Failed to complete the F2 generation. In addition, its morphological characteristics and chromosomes were also studied. The results showed that Dendrolimus tabulaeformis, Dendrolimus tabulaeformis and Dendrolimus punctatus were indeed the same species, but due to the long-term adaptation to different ecological environments, the morphological and biological characteristics of each other had been somewhat different. According to the zoological nomenclature Stipulates that we believe that the oil pine caterpillars and red pine caterpillars should be respectively designated as Dendrolimus punctatus subsp., That is, Dendrolimus punctatus (Den drolimuspunctatust?