锈色粒肩天牛生态学特性研究

A Study on Ecological Characteristics of Apriona swainsoni Population

锈色粒肩天牛(Apriona swainsoni)是危害国槐(Sophora japonica)的重要蛀干害虫,研究其生态学特性,对锈色粒肩天牛的预测预报及有效控制具有十分重要的意义。通过对河南省不同地理区域的受害国槐抽样调查,发现锈色粒肩天牛的发生危害与地域、胸径、枝干方位、树木生理状况、温度、降水、温湿系数等环境生态因子有密切的关系。结果表明,以胸径19～32 cm的国槐树木受害较重,以树木西南向虫口密度最大;气温与虫害发生呈正向变化,而降水量、温湿系数与虫害发生呈反向变化。

Apriona swainsoni is an important wood borer harmful to Sophora japonica.To study the ecological characteristics of the A.swainsoni is of key and significant importance to the prediction,forecast and effective control of the insect.Based on a sample survey to the damaged S.japonica.Distributed in different geographic locations in Henan Province,it was found that the occurrence and harm of the A.swainsoni population have a close relationship to such environmental ecological factors as geographic location,breast diameter,branch position,physiological status of the trees,temperature,rainfall,and moisture-temperature coefficient,etc.The results showed that the trees with a breast diameter of 19 to 32 cm were damaged seriously and the south-west side of a tree had the highest insect density.As for the insect occurrence,temperature had a positive effect while rainfall and moisture-temperature coefficient had a negative effect.