信息素迷向法规模化防治梨小食心虫

梨小食心虫是梨树和桃树上一种重要的蛀食性害虫,为了推动果园害虫的无公害防治,2010年在山东省莱阳市的桃园和梨园应用信息素散发器对梨小食心虫进行了迷向防治研究。在应用信息素散发器的桃园与梨园中,梨小食心虫发生数量明显低于对照园,使用密度增加,梨小食心虫的发生数量降低,迷向率增加。每公顷施用信息素散发器450、900、1350根的桃园,对梨小食心虫的迷向率分别为67.80%、80.14%、89.29%,而梨园中对梨小食心虫的迷向率分别为84.17%、93.41%、98.17%。桃园与梨园施用信息素散发器后,梨小食心虫的蛀果率明显低于对照园,桃园与梨园对梨小食心虫的防治效果分别在40.34%～73.57%和54.24%～92.38%之间。研究表明,梨园中信息素散发器对梨小食心虫的防治效果高于桃园。

Scale control over Grapholitha molesta with mating disruption of sex pheromone

Grapholitha molesta Busck is an important pest on pear and peach trees. In order to promote the non-environmental-pollution pest control in the orchard, scale control over G.molesta with mating disruption of sex pheromone was studied in peach and pear orchards in Laiyang, Shandong Province in 2010. It was suggested that the number of G.molesta in treated peach and pear orchards was lower than that in untreated orchards. The number of G.molesta decreased and the rate of mating disruption increased with the increment of pheromone dispensing devices in the orchards. The rates of mating disruption in different peach orchards with 450, 900 and 1350 pheromone dispensing devices per hectare were 67.80%, 80.14% and 89.29% respectively, while in pear orchards the rates were 84.17%, 93.41% and 98.17%. The rates of infested fruits in both treated peach and pear orchards were lower than that in untreated orchards. The control effects of pheromone dispensing devices on G.molesta ranged from 40.34% to 73.57% in treated peach orchards, and from 54.24% to 92.38% in treated pear orchards, indicating that the control effect on G.molesta in treated pear orchard was higher than that in peach orchards.