通过1982—1984年在林内用185000粒柞蚕(Anthcraea Pernyi)卵的招引和以落叶松毛虫(Dendrolimus superans)卵中的分离结果表明,松毛虫赤眼蜂(Trichogramma dendrolimi Mats.)在松林内形不成优势种群。落叶松毛虫卵不是松毛虫赤眼蜂的主要寄主,只是补充寄主。黑龙江省林区的气象因子不能满足松毛虫赤眼蜂大量繁殖的条件。所以人工施放赤眼蜂是落叶松毛虫卵寄生率低(0—19.7％)的主要原因。 The results showed that Trichogramma dendrolimi Mats. Could not be formed in the pine forest by using the index of 185000 eggs of Anthrax Pernyi in the forest from 1982 to 1984 and the isolation of eggs from the eggs of Dendrolimus superans. The dominant population. Dendrolimus caterpillars eggs are not the main host Trichogramma trichogramma, just add the host. Meteorological factors in the forest area of ​​Heilongjiang Province can not meet the conditions of Trichogramma trichomus multiply. Therefore, the artificial application of Trichogramma was the main reason for the low (0-19.7%) parasitism of Larvae.