Rice blast caused by Magnaporthe oryzae as the worldwide rice disease is an important factor to influence high and stable yield.Chemical pesticides and disease-resistant varieties potentially effective control rice blast in present.But the physiological race of Magnaporthe oryzae changes easily and the breeding time for cultivar-resistance is long.Especially,chemicals yet pose residual toxicity and environmental pollution.Therefore,it reaches extremely urgent for rice industry in sustainable development to finding an effective way to bio-control rice blast.Biopesticide is the important fungicide with some priorities including low residue,efficient,no pollution to the environment and not easy resistant to pathogens.Biopesticides commonly used to control rice blast include microorganism drugs,botanical drugs and phytoalexin.This study aims to summarize mechanism and application of biopesticide against rice blast and analysis of its prospect.%稻瘟病是一种世界性稻作病害,是影响高产、稳产的重要因素.目前利用抗病品种和化学农药是防治稻瘟病的主要措施,但是稻瘟病菌生理小种易变异,抗病品种选育时间较长,化学农药的残留污染环境,寻找有效的生物防治途径对于水稻产业可持续发展迫在眉睫.生物农药具有低残留、高效、对环境无污染、病原菌不易产生抗药性等优点,是防治稻瘟病的重要杀菌剂.在稻瘟病防治中常用的生物农药包括微生物源农药、植物源农药和植保素.本文主要综述了生物农药在稻瘟病防治中的生防机制与应用研究现状,分析生物农药在稻瘟病防治中的前景.
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