冀东地区亚洲玉米螟化性探讨

A Preliminary Study on the Voltinism of Ostrinia furnacalis(Guenée) in the Eastern Region of Hebei Province

在冀东地区全年分别对亚洲玉米螟田间落卵量、越冬幼虫数量及黑光灯诱蛾量进行调查和统计。结果表明,亚洲玉米螟在冀东地区玉米田全年共发生以3化性为主的不完全世代。亚洲玉米螟在春玉米田发生第1代和第2代,在夏玉米田发生第2代和第3代。统计显示,玉米秸秆中越冬幼虫以3化性为主,3化性幼虫占幼虫总数的73.7%;黑光灯逐日诱蛾量分析显示,全年共形成3个较集中的诱蛾量动态,共诱集成虫1 589头,黑光灯全年诱蛾量动态与玉米螟田间落卵量呈极显著相关。

The Asian maize borer including amounts of oviposition and black light lamp trapping moths, over wintering larvae in the maize stalks were surveyed in the eastern region of Hebei province. Through analysis to the in- vestigation data in fields, it was determined that the occurrence of the Asian maize borer is mainly three generations in the whole year. The first and second generation eggs of O. furnacalis appeared in the spring maize field, subsequently, the second and third generation＇s was followed in the summer maize field. Over wintering larvae were mainly distributed in the summer maize stalks as the third generation occurrence and the rate was 73.7% of total. Moreover, the number of accumulated moths was 1 589 from April to November of 2011 by black light lamp trapping the pests. And main population dynamics of maize borer moths were occurred in three separate time series. Furthermore, egg masses of the Asian maize borer were extremely significantly related to moth population. Therefore, the main occurrence of the third generation of O. furnacalis in the eastern region of Hebei province was concluded.