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本文在测定油松毛虫幼虫静态格局和动态格局的条件下,全面而系统地进行了株抽样、轮抽样和“枝”抽样的研究。根据幼虫在各轮垂直分布的特征和喜食二年生针叶的特性,建立回归模型,从轮抽样发展到“枝”抽样,通过检验,预报精度在91—98％之间。轮抽样比株抽样平均提高效率6倍,“枝”抽样比轮抽样又平均提高1.5倍。如费用以每株0.20元计,轮抽样比株抽样每株平均减少0.16元,“枝”抽样每株又减少0.032元。
In this paper, we studied the static and dynamic patterns of Dendrolimus tabulaeformis larvae, and conducted a comprehensive and systematic study of strain sampling, round sampling and branch sampling. According to the vertical distribution of larvae in each round and the characteristics of the biennial needles, the regression model was established and the sampling was developed from wheel to branch. The accuracy of prediction was between 91% and 98%. Round sampling than the average sampling efficiency of 6 times, “branch” sampling and wheel sampling and an average increase of 1.5 times. Such as the cost of 0.20 yuan per plant dollars, round sampling than the average per plant reduction of 0.16 yuan per plant, “sticks” per plant and a decrease of 0.032 yuan.