山东潍坊地区夏玉米穗期钻蛀性害虫发生现状

Occurrence of borer pests at the ear period of summer maize in Weifang, Shandong Province

为明确夏玉米穗期钻蛀性害虫的为害情况,在潍坊地区7个具有代表性的县(区)进行田间幼虫调查和成虫灯诱监测。结果表明,潍坊地区夏玉米穗期玉米螟、棉铃虫和桃蛀螟混合发生且为害严重,其所占比率因地而异,但总体上桃柱螟(53.50%)已经超越玉米螟(24.57%)和棉铃虫(21.93%)在穗期钻蛀性害虫中占绝对优势。同时期测报灯下棉铃虫为优势种,与田间幼虫的调查结果并不完全相同。

To clarify the damage of borer pests at the ear stage of summer maize, we conducted a field investigation and light trap monitoring in seven representative counties(districts) in Weifang. The results showed that three borer species,Ostrinia furnacalis(Guenée), Helicoverpa armigera(Hübner), and Conogethes punctiferalis(Guenée) occurred in the maize field, causing serious damage at the ear stage in Weifang, and the species proportion differed from county to county.In general, the population of C. punctiferalis(accounting for 24.57% of the mixed population) had surpassed O. furnacalis(24.57%) and H. armigera(21.93%). During the same period, the dominant species was H. armigera under the light trap, slightly different from the results of the field investigation of larvae.