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长期以来,农友们在使用化学农药防治农作物病虫害时,经常反映使用效果不好的问题。这中间有多方面的原因。农药用了,效果不佳,不懂科学,浪费惊人,用药不当造成损失,这些足以说明,加强化学农药使用技术的宣传,提高化学农药的使用效果,有必要向农民进行这方面知识的普及,已经是刻不容缓了。笔者认为,有以下几个问题应该引起高度重视。有针对性地选择农药品种。各种病菌、害虫、杂草和其他一些有害生物体,其机体构造、生理机能、生活习性各不相同,同一种药剂对不同防治对象的药效不
For a long time, farmers using chemical pesticides to prevent crop pests and diseases, often reflect the use of poor results. There are many reasons for this. Pesticides are used, the effect is not good, do not understand science, astonishing waste, improper use of drugs caused the loss, which is sufficient to strengthen the use of chemical pesticide technology to promote the use of chemical pesticides, it is necessary to farmers in this regard the popularity of knowledge, It is already an urgent matter. The author believes that there are several issues that should be given high priority. Targeted choice of pesticide varieties. A variety of bacteria, pests, weeds and other harmful organisms, the body structure, physiology, life habits vary, the same agent for different control efficacy of the object is not