利用性信息素迷向技术防治桃园梨小食心虫的效果与分析

Effect Analysis of the Mating Disruption Technology of Sex Pheromone against Grapholitha Molesta Busck on Peach

为了绿色防控桃园梨小食心虫的为害,进行了性信息素迷向技术防效实验.连片100×667m2以上的桃园,平均亩悬挂梨小食心虫迷向丝60枚,迷向丝对梨小食心虫各代成虫的迷向率可达96％以上,且持效期在4个月以上,对各代折梢防效在94％以上,蛀果防效在96％以上,全年用药次数减少4～7次.结果表明,该技术对桃树整个生育期梨小食心虫的为害具有良好的控制作用,可有效减少农药防治次数和用药量,值得大面积推广应用.

In order to control Grapholitha molesta busck in environmental-friendly way, the effi- cacy trials of sex pheromone mating disruption were carried out in more than 100 connected peach orchards with each unit area of 667m2. 60 pieces of mating disruption wire were hung per unit area in average. The effect of mating disruption wire for each generation of Grapholitha molesta busck reached more than 96%, lasting for 4 months or more. The effect of avoiding top-breakage and fruit decay reached more than 94% and 96%, respectively. The annual frequency of pesticide use reduced 4-7 times. The results showed that this technology could prevent infestation of Grapholitha molesta busck successfully during the entire growth period of peach tree. It is worth for largescale extension because it can effectively reduce the dosage and frequency of pesticide use.