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小麦蚜虫(麦长管蚜 Macrosiphum avenae;麦二叉蚜 Schizaphis grarninum;黍缢管蚜 Rhopalosiphum padi)是小麦上的重要害虫,大多数年份发生都较为严重,严重影响小麦生产。目前,麦蚜的防治指标定为500—600头/百株,为了使指际在生产上应用,我们于去年五月对小麦蚜虫的空间分布及抽样方法进行了初步的调查研究。一、研究方法本次调查以株为单位,共选查了8个大区,每大区面积为20×20m~2。将每一大区划分为16个小区,在每一小区内随机抽查50株,逐株记载蚜虫数及僵蚜数(只记穗部蚜虫)。以每大
Wheat aphids (Macrosiphum avenae; Schizaphis grarninum; Rhopalosiphum padi) are important pests on wheat and most of the years are more serious and seriously affect the wheat production. At present, the control index of wheat aphids is set at 500-600 heads per 100 plants. In order to facilitate the application of the fingerprints, we conducted a preliminary investigation on the spatial distribution and sampling methods of wheat aphids in May last year. First, the research methods The investigation of the unit as a unit, a total of 8 selected areas, each area of 20 × 20m ~ 2. Divide each district into 16 districts, and randomly select 50 plants in each district to record the number of aphids and the number of aphids per plant (only the spikes of aphids). To each big