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为明确二点委夜蛾Athetis lepigone(M?schler)在河南省的发生规律,于2012—2013年在该省各地采用灯光诱集法对二点委夜蛾成虫进行诱测。结果表明:河南省二点委夜蛾每年发生4代,其中越冬代成虫在4—5月陆续羽化,未形成明显的高峰,第1代成虫高峰期为6月上中旬,第2代成虫高峰期为7月中下旬,8月下旬9月初为第3代成虫高峰期,其中第2代成虫密度明显大于第1代和第3代。2012年二点委夜蛾在河南省北部地区发生较重,浚县第2代成虫密度为4 916头,2013年河南省中东部发生较重,民权县和长葛市第2代成虫密度分别达到8 409头和5 390头。对成虫监测结果分析发现,2012—2013年河南省二点委夜蛾成虫发生期与降雨量和温度的关系不稳定,但每年第2代成虫密度与该年5、6月下旬日均降雨量呈显著正相关,依据5、6月下旬的降雨量和温度建立的2012年和2013年第2代成虫密度自然对数回归方程的均方根误差分别为0.612和0.752,可较好地反映二点委夜蛾第2代成虫的发生密度。
In order to clarify the occurrence rule of Athetis lepigone (Möchler) in Henan Province, two adults were surveyed by light trapping method in 2012-2013. The results showed that there were 4 generations of the armyworm in Henan Province each time, in which the overwintering adults emerged gradually from April to May, and no obvious peak was formed. The first generation of adult adults peaked in mid-June and the second generation of adult peaks The period was mid to late July and the late August to early September was the third generation adult peak, of which the second generation adult density was significantly greater than the first generation and third generation. In 2012, the second generation of the night-stage moth occurred in the northern region of Henan heavier, the second generation of Junxian adult density of 4 916 heads in 2013 in Henan Province, the eastern part of the heavier, civil rights and Changge City, the second generation adult density Reaching 8,409 heads and 5,390 heads. The analysis of adult monitoring results showed that the relationship between the occurrence and the rainfall and the temperature of the adult was not stable during 2012-2013. However, the average annual adult population density of the 2nd generation and the average daily rainfall in May and June of the same year The root mean square error of the natural logarithm regression equation of the second generation adults in 2012 and 2013 was 0.612 and 0.752 respectively based on the rainfall and temperature in late May and June, The occurrence density of 2nd generation adults of the phyllotrophthora elata.