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化学防治是植物病害防治重要的、有效的手段。科学合理使用杀菌剂可有效控制病害,减轻损失,但使用不当既不能有效控制病害,又会造成农产品和环境的污染,影响农业的可持续发展。近年来随着科技推广力度的加大,农民的科技意识有了显著的提高,杀菌剂的用量也不断增大,但在杀菌剂的使用过程中也暴露出很多问题,如不能对症施药,用药时期不合理,农药使用方法不得当等于降低了杀菌剂的防病效果,以致得不偿失,不但增加了投入,甚至引起不必要的纠纷。因此,科学合理使用杀菌剂,应从病害种类、特点、药剂选择以及使用方法等诸方面加以考虑,方能达到防治病害控制危害的目的。
Chemical control is an important and effective method for plant disease control. Scientific and rational use of fungicides can effectively control diseases and reduce losses. However, improper use can neither effectively control diseases, but also cause pollution of agricultural products and the environment and affect the sustainable development of agriculture. In recent years, with the promotion of science and technology, farmers’ awareness of science and technology has been significantly improved, the amount of fungicides are also increasing, but the use of fungicides also revealed many problems, such as can not symptomatic drug application, Irrational use of drugs, pesticides should not be used equivalent to reducing the anti-fungal effect of disease prevention and control, resulting in gains and losses, not only increased investment, and even lead to unnecessary disputes. Therefore, the scientific and rational use of fungicides should be considered from the aspects of disease types, characteristics, choice of medicaments and methods of use, so as to achieve the purpose of preventing and controlling the harm of disease control.