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化学农药是防治农作物病虫草害的重要手段,科学合理施用化学农药,不但可有效地防治病虫草的危害,还能促进农作物的生长发育,提高产量。如果使用不当,不仅不能充分发挥药剂的作用,反而将会对农作物造成不同程度的药害。因此,首先要了解掌握主要作物对农药的耐药程度,分析农作物对化学农药的反应,然后对症下药。农药的新品种、新剂型应在进行药害试验的基础上,慎重推广使用。
Chemical pesticides is an important means of preventing and controlling pests and diseases of crop plants. Scientific and rational application of chemical pesticides not only can effectively prevent and control the harm of pests and diseases, but also can promote the growth and development of crops and increase the yield. If not used properly, not only can not give full play to the role of pesticides, but will cause varying degrees of crop injury. Therefore, we must first understand the degree of resistance of major crops to pesticides, analysis of crop response to chemical pesticides, and then the right medicine. New varieties of pesticides, new formulations should be carried out on the basis of phytosanitary tests, carefully promote the use of.