二点委夜蛾发生为害特点 发生规律及防治技术研究

Damage Characteristics,Occurrence Regularity and Control Technology of Proxenus lepigone

二点委夜蛾[Proxenus lepigone(Mschler)]为鳞翅目害虫,2005年在安新县夏玉米田首次发现为害,2010年发生程度明显上升,2011年发生范围进一步扩大且程度加重。为此,2010年和2011年对安新县二点委夜蛾田间发生为害情况进行了调查,同时对2011年测报灯诱集二点委夜蛾成虫的数据进行了整理分析。结果表明:二点委夜蛾具有局部暴发、选择性强、为害重的发生特点,初步认定其在安新县1 a发生4代,以老熟幼虫在田间杂草及枯枝落叶下越冬。针对二点委夜蛾的发生为害特点,提出了防控技术措施。

Proxenus lepigone was first found in summer corn field in 2005 in Anxin County.The damage degree was serious in 2010.In 2011,the occurrence range expanded and the damage was more serious.The occurrence and damage of P.lepigone in field were investigated in 2010 and 2011 in Anxin County.At the same time,the information of the pests trapped by lamp in 2011 was analyzed.The results showed that it had the characteristics of local outbreaks,strong selectivity and serious damage.There were four generations in a year.The mature larvae over-wintered under the weeds and litter.According to the damage characteristics,the control technology was provided.