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利用七星瓢虫(CoccineLLa septempunctata L.)防治蚜虫,已在我国广大地区开展试验和应用。我们在河南安阳和当地群众一起从事以瓢治蚜的过程中,注意到麦收前后,就是每年6月上旬至中旬,田间成虫突然大量消减,而又没有发现大量死虫。曾到其北部漳河林区进行追踪,无结果。1975—1976年当地群众在全县范围内调查并无踪影。1976年作者之一(河北林专等1977《昆虫知识》14卷第2期)在秦皇岛海滨发现了数以亿计的七星瓢虫的集结。 为了揭示海岸七星瓢虫群聚之“谜”,我们在秦皇岛海滨作了进一步的观察研究。现将结果简报如下。
The use of Coccinella septempunctata L. (Coccinella septempunctata L.) to control aphids has been tested and applied in many areas of our country. When we worked with the local people in Anyang, Henan Province, to cure aphids with scoops, we noticed that before and after the wheat harvest, there was a sudden and substantial abatement of adults in the field from early to mid June each year, but no large numbers of dead insects were found. Has been to the north of Zhanghe forest tracking, no result. Between 1975 and 1976, local people surveyed throughout the county did not disappear. One of the authors in 1976 (Hebei Forestry and other 1977 “Insect Knowledge” Volume 14, No. 2) in Qinhuangdao beach found hundreds of billions of Coccinella buildup. In order to reveal the “mystery” of the cluster of ladybugs on the coast, we conducted further observational studies at the seaside of Qinhuangdao. The result is now as follows.