辽阳地区玉米螟发生条件分析与预报模式

利用1994～2004年辽阳市植物保护站提供的玉米螟田间调查资料与辽阳市气象台同期气象资料进行了相关分析,找出了影响玉米螟发生的3个主要因子,并建立了多元回归预报模式。结果表明:辽阳地区1月平均气温、上年5月的虫卵量、上年10月幼虫量与当年虫害发生轻重关系十分密切;控制10月幼虫量,是防治下年度玉米螟虫害大面积发生的主要环节;虫害发生的轻重有明显的周期性变化。

Occurrence conditions of Ostrinia furnacalis in Liaoyang

Based on long-term field investigation data of Ostrinia furnacalis occurrence in plant protection station of Liaoyang and the related meteorological data in Liaoyang meteorological center from 1994 to 2004,3 factors controlling Ostrinia furnacalis occurrence were analyzed and the model of Ostrinia furnacalis occurrence was established.The results showed that the intensity of Ostrinia furnacalis occurrence in current year was mainly related to the average temperature of January,swamping quantity of May in last year,and larva quantity of October in last year.Controlling larva quantity of October was important to prevent and cure insect pest of the corn borer occurrence in next year.At the same time,the intensity of insect pest obviously took on periodic changes.