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防治农作物病虫害是确保农业高产优质的重要措施之一。最常用的防治办法是施用化学农药。当前施用的农药存在三多:乳剂型的多、剧毒的多、高残留的多。使用这些农药防治有许多弱点和弊端:一是污染环境,危害人畜健康。二是在杀灭病虫害的同时也杀死了有益生物,破坏生态平衡。三是害虫易产生抗药性。笔者认为,当前防治病虫应进行四项改进,才能收到好的防效。
Prevention and control of crop pests and diseases is one of the important measures to ensure high yield and quality of agriculture. The most commonly used control is the application of chemical pesticides. The current application of pesticides there are more than three: more than the emulsion type, highly toxic, high residue and more. There are many weaknesses and disadvantages of using these pesticides to prevent and control: First, pollute the environment and endanger the health of people and livestock. Second, kill pests and diseases while also killing beneficial organisms, undermining the ecological balance. Third, pests easy to produce resistance. The author believes that the current pest control should be carried out four improvements in order to receive good control effect.