梨小食心虫性信息素田间应用技术研究

Research on the field application of sex pheromones of the oriental fruit moth

梨小食心虫Grapholitha molesta（Busck）是梨园、桃园重要的果树害虫。本文比较研究了梨小食心虫性信息素在梨园、桃园悬挂不同高度、设置不同密度对梨小食心虫雄性成虫诱捕效果的影响，结果表明：在梨树树冠范围内，梨小食心虫性信息素最佳设置高度为2m；在桃树树冠范围内，梨小食心虫性信息素最佳设置高度为1．5m；同时，田间诱捕效果与性信息素设置密度密切相关，梨园中，每0．067hm^2设置密度为6～10个诱芯时，对梨小食心虫的诱捕效果影响不大，而桃园中每0．067hm^2设置8个诱芯时，有最好的诱集效果。本研究可为梨小食心虫性信息素田间应用提供指导。

The oriental fruit moth （ Grapholitha molesta （Busck）） is one of the main pests in pear and peach orchards. The effect of the height and trap density on the trapping efficiency of traps baited with the sex pheromones of this insect was determined. The results showed that the best trapping efficiency was achieved when traps were 2 m from the ground in pear orchards, and at 1.5 m from the ground in peach orchards. Trapping efficiency was closely related to sex pheromone density. There was no significant difference in the trapping efficiency achieved by trap densities of 6-10 per 0. 067 hm2in pear orchards but a trap density of 8 per 0. 067 hm2 had the best trapping efficiency in peach orchards. These results provide a guide to the control of oriental fruit moths in the field.