四川西部地区桃小食心虫发生规律和防治研究

本文研究了桃小食心虫的生物学和生态学特性。结果表明:桃小食心虫在四川西部1年发生1代;越冬幼虫出土数量与前旬降雨量呈正相关;幼虫出土至羽化的历期与温度呈负相关。并推导出了成虫初见日与5月份温雨系数的直线回归方程式。幻虫在果内的成活率随果实膨大而增加。幼虫危害苹果的空间分布型属典型的聚集分布。其聚集强度是:低密度,高聚集;高密度,低聚集。本文还研究了防治桃小食心虫的方法。

STUDY ON THE ERGULARITY OF OUTBREAK AND CONTROL OF THE PEACH FRUIT MOTH IN WESTERN SICHUAN

This paper deals with the biological and ecological character of thepeach fruit moth.The insect undergoes one generation a year in WesternSichuan.There is a positive correlation between the emergence of thehibernating larva from the soil and that of the rainfall in the first ten-days of a month.But a negative correlation between the duration fromlarva to adult and the temperature.So we can get the linear regeressionequation about the date of the first appearance of adults and the tempe-rature-rainfall coefficient in May.The survival rate of larvae in fruitincrease with the enlergememt of the fruit.The space dispersion of thepopulation of the peach fruit moth is a typical aggregatad dispersion inapple trees.The aggregated intenaities were high density with pooraggregation and poor density with strong aggregation in July to Septem-ber.This paper also reports the control method and the effect of largescale demonstration in Western Sichuan.