祥云新松叶蜂种群密度简易估计方法及防治研究

Researches into Using Easy Methods for Estimating Population Density of Neodiprion xiangyunicus and its Control

通过祥云新松叶蜂（Ｎｅｏｄｉｐｒｉｏｎｘｉａｎｇｙｕｎｉｃｕｓ）低龄幼虫和茧空间分布格局及参数ｍ＊、Ｋ、α、β值估计低龄幼虫林间种群密度ｍ＝７５６３－７６０６Ｐ０、茧林间种群密度ｍ１＝０．９４６３（Ｐ－１．０５６７０－１）×１００；在９月初至１０月中旬，以２．５％敌杀死乳油、２５％灭扫利乳油２００００倍进行超低量喷雾，选择性防治有虫株，防治效果达９２．４０％。在１１月上旬至１１月中旬对小面积虫源地、林缘地带林及个别高大树株，用１５％杀虫双水剂每株５ｍｌ进行注干防治，防治效果为９０．００％。在１１月至１２月上旬，采用敌马烟剂放烟，防效达９７．８１％。在６月下旬至７月上旬，在高虫口成灾区，人工刨茧，防效达８６．１０％。

This paper deals with the easy method for estimating the larvae and cocoons of Neodiprion xiangyunicus by means of probabitity distribution formulas,M 、α、κ、β The population density of early larvae m=7563-7606 P 0 and cocoons m 1=0.9463(P -1.0567 0-1)×100.From mid September to mid October,superlow volume spraying 1∶200002.5% decis and 25% micilin,the larvae population density was reduced by 94.40%.In early November to mid November,giving the bole an injection of 15% Sachonsang 5ml/per tree,the control of effect can reach 90%.In November to early November,using smoke agent,the control of effect can reach 97.80%.In late June to early July,picking cocoons in high density population,the control of effect can reach 86.40%.