摘要:
该文利用不同受害程度的油松针叶饲养油松毛虫幼虫,研究其对幼虫生长发育的影响.结果表明:油松毛虫取食受害松针后,营养指数都有所下降,尤其是取食受害50%的松针对幼虫影响最大,其取食量、排粪量最小,对食物的消化和利用指数较低,幼虫发育缓慢,死亡率增大,蛹重减轻,从而影响了油松毛虫的种群动态;取食受害25%和受害75%松针的幼虫的营养指数比较接近.同时深色型幼虫的营养指数较浅色型的高,死亡率较低,但在取食受害50%的松针后期,深色型幼虫的一些营养指数反而比浅色型的低.
关键词:
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受害油松
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油松毛虫
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色型
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生长发育
Abstract:
Pine caterpillar(Dendrolimus punctatus tabulaeformis) larvae were fed with damaged pine needles of different degrees to evaluate the effects of pine needles on the growth and development of them.The results showed that the nutritional index of the larvae declined.Especially,the least amount of food ingested and voided feces,least nutritional index,slower development,lightest pupae and more mortality were found in those pine caterpillar larvae fed with pine needles of 50 % damaged.The damaged pine needles significantly influenced the population dynamics of pine caterpillar.The nutritional indexes of larvae fed with 25 % and 75 % damaged pine needles were similar.And the nutritional index of the dark morph was higher than that of the tint one,and its mortality was lower than that of the tint morph.However,this phenomenon was reversed at the later stage of taking pine needles of 50 % damaged.
百度学术
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