我们金县友谊公社共有果树二十五万余棵,分布在十三个大队,是个老果区。果园常见病虫达五十余种之多,是个病虫害老窝。由于病虫的危害,严重地影响了水果的产量和果品质量的提高,每年防治病虫害的支出占果树生产支出的百分之二十五到三十。如何改变这种局面,在我们面前提出了一个重要的课题。 We Jinxian Friendship Commune, a total of more than 250,000 trees fruit trees, distributed in thirteen brigades, is an old fruit. Orchard common pest up to more than 50 species, is a pest nest. Pest and disease damage has seriously affected the yield of fruit and the quality of fruit. The annual pest and disease control expenditures account for 25% to 30% of the expenditure on fruit trees. How to change this situation has put forward an important issue before us.