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以单果为单位，调查了青海云杉种实害虫造成的虫果率、虫蛀种率、单果出种数、种子蛀食损失率 与单果平均虫口密度．并建立了相关模型。根据模型和林分结实量、可估计种实害虫造成的种子损失量。
The single fruit as a unit, investigated Qinghai spruce pests caused by the rate of insect fruit, insect borer rate, the number of single fruit, seed loss rate of loss of seeds and single fruit average population density. And established the relevant model. Based on the model and stand firmness, the amount of seed loss caused by seed pests can be estimated.