祥云新松叶蜂生物学特性及防治研究

Study on Biological Characteristics and Control of Neodiprion xiangyunicus

本文对祥云新松叶蜂（ＮｅｏｄｉｐｒｉｏｎｘｉａｎｇｙｕｎｉｃｕｓＸｉａｏｅｔＺｈｏｕ）生物学特性、环境因子、空间分布型及测报作了初步研究，影响害虫发生危害的主要因子是海拔、坡向、林分组成。用空间分布型指数法测定，幼虫在空间呈聚集分布型的负二项分布，聚集均数λ＞２，说明聚集的主要原因是本身的习性（行为）所引起。利用Ｌｗａｏ抽样方程推算出最适抽样数，为林间大面积虫情调查提供理论依据。

This paper has reported the preliminary study on biological characteristics,environment factors, space distribution types and forecast of Neodiprion xiangyunicus. The result shows that the main factors which affected pest damage are altitude, slope direction, stands. Determining by means of Space Distribution Type lndex, the form of larva distribution in space is negative binomial, and gathering mean value is λ>2, which indicate that the main reason of gathering is their behavior. The optimum samplings have been caculated by Lwao sampling equation, and that will provide theoretical basis for large area investigation of pests damage.