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行唐县位于石家庄地区北部,地处东经114度33分,北纬38度27分。1987年9月23日当地是日偏蚀。这天的棉铃虫成虫大量羽化,出现有史以来的特大蛾峰。据我站1盏40瓦黑光灯诱测,23日夜间共诱到棉铃虫蛾1223头,其中雌蛾693头,雄蛾530头。该日蛾量占9月下旬蛾量总数的96.5％。查阅历史资料,从1971年至1986年期间,每年9月下旬平均蛾量只有33.6头,而这一天的蛾量,相当过去16年旬均蛾量的36.4倍。 为何出现这次特大蛾峰,经与气象资料对比分析认为:1987年9月上、中旬的日均气温为21.6℃,虽然比历年同期偏高1.2℃,
Xingtang County is located in the northern part of Shijiazhuang, located at 114 degrees east longitude 33 minutes north latitude 38 degrees 27 minutes. September 23, 1987 is the Japanese partial eclipse. On this day a large number of adult cotton bollworm emergence, there has been a large moth evergreen. According to my station a 40-watt black light was induced, 23 days were induced to a total of 1223 bollworm moth, of which 693 females and males 530. The daily moth amount accounted for 96.5% of the total number of moths in late September. According to historical records, from 1971 to 1986, the average number of moths per month in late September was only 33.6, while the moths on that day were 36.4 times those of the previous 16-year moths. Why did this extra-large moth peak compare with the meteorological data that the daily average temperature in mid-1987 was 21.6 ℃ in September 1987, though it was 1.2 ℃ higher than the same period in previous years,