橄榄星室木虱卵空间分布型及抽样技术研究

Study on spatial pattern and sampling technique of the eggs of Pseudophacopteron canarium

应用分布型指数法研究了橄榄星室木虱卵的空间分布型和抽样技术.Iwao的回归模型a=1.943 5>0、b=1.052 2>1和Taylor幂法则α=0.214 7>0、β=1.295 8>1表明:橄榄星室木虱卵呈聚集分布,聚集强度随种群密度的升高而增强,聚集原因由种群聚集均数λ>2可知是昆虫本身的习性所致,分布的基本成分是个体群,个体间相互吸引.在空间格局的基础上制定了不同允许误差下的最适抽样公式和判断橄榄星室木虱是否达到防治标准的序贯抽样表.

The spatial pattern and sampling technique of eggs of Pseudophacopteron canarium were studied by distribution exponent method in the paper. Regressial model of Iwao a = 1. 943 5 〉 0,b = 1. 052 2 〉 1, and Taylor power principle α = 0. 214 7 〉 0 and β = 1. 295 8 〉 1 showed that the distribution of eggs of P. canarium was assembling distribution and the intensity increased with population density increasing; the reason for assembling can be known as insects＇ natural habit from population assembling average A 〉 2. The basic component of the adult distribution was the individual colony, and they attracted each other. Based on spatial distribution type, the equation to determine the optimal sampling numbers under different allowed error was developped, and the table of sequential sampling to determine standardization of the prevention was offered.