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本文利用1984—1986年3年时间,对赤松毛虫年生活史、各虫态历期、各虫态发生期、蛹重—携卵量的关系、幼虫及蛹的自然死亡率、幼虫食叶量、幼虫上(下)树规律等,进行了观测研究。结果表明,赤松毛虫幼虫平均历期346天,上(下)树进度与气温关系密切,赤松毛虫不仅直接取食为害,还可造成松针死亡或折断,其蛹重—携卵量的关系为y=-54.9+148.3x(r=0.9612,S=±4.9),呈直线紧密相关关系。根据赤松毛虫年生活史及其活动规律,本文还提出了最佳防治期。
In this paper, the annual life history of Dendrolimus spectabilis from 1984 to 1986 was studied. The relationships among the annual life history, the duration of each state, the occurrence of each state of the insect, the weight of pups and the number of pupae, the natural mortality of larvae and pupae, , Larvae (under) tree law, etc., were observed. The results showed that the average larval duration of 346 days was about 346 days. The progress of the upper (lower) tree was closely related to air temperature. The red caterpillar not only directly eaten, but also caused the death or breakage of the pine needles. = -54.9 + 148.3x (r = 0.9612, S = ± 4.9), showing a close linear relationship. According to the annual life history of Dendrolimus spectabilis and its activity rules, this article also proposed the best control period.