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回升情况及其原因小麦吸浆虫在宁夏有两种:麦红吸浆虫是主要种类,发生在引黄灌区;麦黄吸浆虫在宁南半阴湿山区。五十年代小麦吸浆虫曾在宁夏麦区普遍发生,使小麦大幅度减产。经连续防治后,二十余年来未曾发现其为害。1983年在贺兰县常信等乡发现时,此虫为害已达严重程度。当年在其县调查发现,有吸浆虫为害的队占调查队的62.6%,虫面有积占调查面积的54.7%,通过对较严重的4个乡6个队剥穗检查,穗被害率最
The situation and the reasons for the rise of wheat midge in Ningxia there are two: Midi inhalation is the main species occurred in the Yellow River irrigated area; Fog inhalation in the 1950s occurred in the wheat area of Ningxia, so that a substantial reduction of wheat production. After continuous prevention and control, it has not been discovered for more than two decades. In 1983, Helan County, Chang and other towns found that the insect has reached a serious degree of harm. Year investigation in its county found that there are Falcon inhaled teams accounted for 62.6% of the investigation team, insect surface area accounted for 54.7% of the survey area, through the more serious 4 townships 6 teams stripping inspection, the ear damage rate