1991年至 1 994年 ,在浙江省淳安县姥山林场进行了杉木球果生命表的研究。杉木球果在生长发育期间 ,因霜冻、病害和虫害等的影响 ,每年平均损失球果约 2 3%。结果表明 ,致使球果损失的关键因子是灰霉病 ,每年平均损失球果约 1 3% ;其次是杉木扁长蝽和瘿蚊 ,每年平均损失球果约 8%。表 2参 5 From 1991 to 1994, the research on the life table of cedar cones was conducted in Laoshan Forest Farm, Chun’an County, Zhejiang Province. During the growth and development of fir cones, the average annual loss of cones is about 23% due to frost, diseases and insect pests. The results showed that the key factor causing cones loss was Botrytis cinerea, which lost an average of about 13% of cones per year; followed by Fusarium moniliforme and Aedes albopictus, which lost an average of about 8% of cones per year. Table 2 reference 5