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对当年受赤松毛虫危害和未受危害的油松新长出的一年生针叶化学成份以及用其饲养的赤松毛虫的发育情况进行了测定分析，结果发现受害油松新长出的一年生针叶化学成份仍有较大幅度的变化，主要表现在氨基酸总量及多数游离氨基酸含量下降；水溶性总糖、粗脂肪、生物碱含量及总糖／ 氨基酸比例上升；脂肪酸、单宁、酚类化合物均有较大幅度的减少；用其饲养的赤松毛虫幼虫体重减轻、死亡率比对照高１９－２ ％ 。油松对赤松毛虫的滞后诱导抗性至少在半年以上。
On the year by the red caterpillar damage and harm harvested Pinus tabacum New annual coniferous chemical composition and the development of the red caterpillar beetles were measured and analyzed the results found that Pinus tabulaeformis newly grow annual coniferous chemistry The contents of total amino acids and the majority of free amino acids decreased; the contents of water-soluble total sugar, crude fat, alkaloids and the ratio of total sugar / amino acid increased; fatty acid, tannin and phenolic compounds There is a more substantial reduction; the red caterpillars feeding their larvae weight loss, the mortality rate 19-2% higher than the control. The laxation resistance of Pinus tabulaeformis to C. Dendrolimi was at least six months old.