三种小食心虫是辽宁西部梨区的一类重要害虫,尤其影响外销品种鸭梨、秋白梨的产量和质量、损失至大。对于这类害虫,以往主要是依靠树上多次喷药保果的方法,但防治效果不甚理想,虫果率仍然很高。因此,我们从1976年开始对三种小食心虫的有 Three kinds of small bore worms is a kind of pest in western Liaoning pear area, in particular, affect the export varieties of pear, autumn pear yield and quality, loss to the maximum. For such pests, in the past mainly rely on the tree multiple spraying methods, but the control effect is not ideal, fruit rate is still high. Therefore, we have been on three kinds of small bore worms since 1976