Effect of damaged pine needles on growth and development of pine caterpillar larvae |
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| Authors: | Lili Zhang Zhenyu Li Hailin Li Ruidong Han Yongli Zhao |
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| Institution: | (1) College of Resources and Environment, Beijing Forestry University, Beijing, 100083, China;(2) State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100080, China;(3) Institute of Zoology, Chinese Academy of Sciences, Beijing, 100080, China;(4) Forestry Bureau of Chengde County, Hebei Province, Chengde, 067400, China |
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| Abstract: | Chinese pine caterpillar (Dendrolimus tabulaeformis) larvae were fed with pine needles of different degrees of damage to evaluate the effects of pine needles on the growth and
development of larvae. The results showed that the nutritional index of the larvae declines after feeding on the damaged pine
needlings. The lowest amount of food ingested and voided feces, the lowest nutritional index, slowest development, lightest
pupae and most mortality were found in those pine caterpillar larvae fed with pine needles which were 50% damaged. The damaged
pine needles significantly affected the population dynamics of Chinese pine caterpillars. The nutritional indices of larvae
fed with 25% and 75% damaged pine needles were similar. The nutritional index of the dark morphs was higher than that of the
tinted morphs, however, their mortality was lower than that of the tinted morphs. This phenomenon was reversed at the later
stage of development when the larvae were fed on 50% damaged pine needles.
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Translated from Journal of Beijing Forestry University, 2005, 27(6): 83–88 译自: 北京林业大学学报, 2005, 27(6): 83–88] |
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| Keywords: | damaged Pinus tabulaeformis Dendrolimus tabulaeformis color morph growth and development |
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