如皋市梨园黑斑病发生危害规律及防治技术 关键词：梨黑斑病；发生危害规律；防治技术 [gap=571]Keyword:Alternaria kikuchiana; occurrence regularity; control method
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经对果树主要病虫（螨）害在设施条件下的发生危害规律观察，总结出了设施果树病虫害发生特点。
Their occurring characters were summed up based on the observation of occurring regularity of the important pests in fruit trees under installation cultivation.
就河曲县近年来海红果树锈病发生的危害、规律及防治技术进行了综述。
This paper summarizes the hazard, regularity and control technology of the rust disease of Malus micromalus tree in Hequ County.
近几年，铁岭地区稻水象甲的发生面积呈逐年扩大趋势，并表现出一定的发生分布规律及危害特点。
Recent years the occurrence area of rice water weevil is extending increasing with a certain law and harm character.
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