防治病虫害是保证农业增产的一项有效措施。全世界由于病虫杂草对植物的危害,估计每年损失750亿美元。因此,各国都很重视植物保护工作。一、抗病虫育种利用抗病品种来解决农作物病害问题,是一项经济有效的方法。国际上曾用来解决小麦的抗锈病、水稻的抗瘟病、棉花的抗黄桔萎病等重大生产问题。如墨西哥育成抗“三锈”及 Prevention and control of pests and diseases is an effective measure to increase agricultural output. The world is estimated to lose about $ 75 billion a year due to the damage to plants from pests and weeds. Therefore, all countries attach great importance to plant protection. First, the anti-pest breeding Breeding disease-resistant varieties to solve the problem of crop disease, is a cost-effective method. Internationally used to solve the wheat rust resistance, rice blast, cotton, yellow wilt resistance and other major production problems. Such as Mexico educated against “three rusts” and