斑须蝽三代卵块的空间分布和田间抽样技术研究

Studies on the spatial patterns of egg mass of the third generation of sole bug [Dolycoris baccarum (Linn.)] and its sampling technique

通过田间调查和计算，明确了斑须蝽三代卵块呈聚集分布，且以负二项分布为主。理论抽样数当t＝1．00，D＝0．3时，n＝13．091/＋63．878，如果防治指标定为百株虫卵块12块时，则最大抽样数为173株，序贯抽样的累积虫卵块数量界限为：T0（N）＝0.12N±0．4735。田间随机取样以平行线和Z字形为最佳。

On the basis of the investigation and analyzed, the results showed that the distribution pattern of eggs of the third generation of Dolycoris baccarum (L.)belongs to an aggregated distribution pattern and the main pattern type belongs to negative binomial servies When t=1.00, D =0.3, the number of theoretical sampling of eggs is n=13.091/x+ 63.878. If we determine that the control standard is 12 eggs per 100 plants, the number of the maximum sampling is 173 plants and eggs of sequential sampling is T0(N)=0.12N±0.4735. The parallel line and 'Z' method are the optimum sampling pattern for adults and eggs in the field.