玉米铁甲虫是广西的地域性害虫。近年来,该虫呈回升性发生。发生地域有逐渐扩大的趋势。1986年全区有3个地区13个县61个乡(镇)发生,面积42万亩,1987年扩大到14个县68个乡(镇),面积48万亩。严重影响山区的玉米生产。1987年作者对该虫成虫空间分布型及抽样技术进行了初步的研究。调查采用连片的方法,逐穴计数(当地种植习惯一穴双株)分别记载于方格表中。空间分布型以频次分布检验法,平均拥挤度与平均数的自回归(M=α+βx)及方差与平均数的幂法则(S~2=ax~b)进行判断。利用取样框以五点式、棋盘式和平行线跳跃式在田间分布图上取样,经比较确定其中最佳的抽样方法。然后进行抽 Corn iron beetle is a regional pest in Guangxi. In recent years, the pest was rebound occurred. There is a gradual expansion of the geographical trend. In 1986, there were 61 townships (towns) in 13 districts and counties in 3 regions in the region, covering an area of ​​420,000 mu. In 1987, it was expanded to 68 townships (towns) in 14 counties with an area of ​​480,000 mu. Seriously affect the corn production in the mountains. In 1987, the author conducted a preliminary study on the spatial distribution pattern and sampling technique of the insect. Investigation using contiguous method, counting by the hole (local planting habits one hole double strain) were recorded in the grid table. The spatial distribution was judged by frequency distribution test, autoregression (M = α + βx) and power law (S ~ 2 = ax ~ b) of average crowding and average. Sampling frames were sampled on a field map with a five-point, checkerboard and parallel lines by sampling frame, and the best sampling method was determined by comparison. Then pumping