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紫云英绿肥生长旺盛,覆盖度大,覆盖层下温暖多湿,为多种害虫天敌提供了良好的越冬和栖息场所。为了摸清紫云英田内的天敌种类及发生情况。为后茬作物的天敌保护利用提供依据,1984我们进行了该项调查。 一、调查方法 本调查在我院实习农场进行。选有代表性的紫云英田(前作为二季晚稻,后作为早稻),在紫云英生长期间,每隔5天调查一次,调查采取网捕和田间捕捉的方法,每次扫10O网,分别统计天敌的种类和数量,并用单管保存以备查。
Astragalus green manure vigorous growth, coverage, under the cover warm and wet, for a variety of pests natural enemies provide a good place for winter and habitat. In order to find out the natural enemies in the field and the occurrence of the situation. This provided the basis for the protection and utilization of the natural enemies of the following crop. In 1984, we conducted the survey. First, the survey method The survey in our hospital internship farm. A representative representative of Ziyunyingtian (formerly known as Late Season Rice in the Second Season and later as Early Rice) was investigated every 5 days during the growth of Astragalus sinicus. The method of net catching and field catching was investigated. Statistics of natural enemies of the type and quantity, and save with a single tube for future reference.