摘要
文章利用聚集度指标法和频次分布法对新疆地区4种杨树上的白杨透翅蛾幼虫的分布型进行了测定,测定结果表明:均属于聚集分布,其中三种杨树上的幼虫又同时符合负二项分布和奈曼分布,据此,对白杨透翅蛾为害的调查方法、理论抽样数、指导防治等方面作了应用研究。
In this article, the distribution forms of the larva of Paranthere tabaniformis Raitom in four types of poplars in the northern part of Xinjiang were tested with Gathering Degree Index and Frequenuy Distribution and the form found to be gathering. Meanwhile the living larva in three of the four type trees were found to accord with the Negative binominal distribution and Neyman distrbution. Application rescariher were made on the investigation methods on the damage cansed by paranthere tabaniformis Rattom, the theoretical sampling number and the guidance of its protection and cure.
关键词
白杨透翅蛾
幼虫
分布型
防治
杨树
Paranthere tabaniformis Rattom
distribation of larva
sampling methods
thcorcticla sampling number
prevention and cure
