三都县稻纵卷叶螟灯下蛾量的变化动态及田间发生情况

Dynamic Change and Field Occurrence Situation of Trap Lamp Catches of Cnaphalocrocis medialis in Sandu County

为了对三都县稻纵卷叶螟的监测和防治预报提供参考,对贵州省三都县2009年、2010年稻纵卷叶螟灯下诱集蛾量动态及2010年田间发生情况进行了调查和分析。结果表明:三都县稻纵卷叶螟灯下始见期年际间不同,2009年始见期是5月11日,2010年是4月30日;灯下诱集蛾量与田间虫害的发生程度存在关联性,可利用诱集蛾量对稻纵卷叶螟的发生进行辅助预测预报;灯下诱集第1代蛾量极低,从第2代开始,灯下诱集蛾量迅速增加,以第2、第3代居多,这与田间稻纵卷叶螟幼虫以第3、第4代为主害代的实际情况符合。

Dynamic change and field occurrence situation of trap lamp catches of Cnaphalocrocis medialis in Sandu county in 2009 and 2010 were investigated and analyzed to provide a reference for monitoring,forecast and control of Cnaphalocrocis medialis.The results showed that there was difference of trap lamp catches of Cnaphalocrocis medialis in first emergence stage between 2009 and 2010,the first emergence date was May 11 in 2009 and April 30 in 2010,respectively,there was a correlation between trap lamp catches of Cnaphalocrocis medialis and field occurrence degree,which can be used to forecast Cnaphalocrocis medialis occurrence degree in rice field.The trap lamp catches of Cnaphalocrocis medialis increases from the second moth generation rapidly,which accords with the real damage status of Cnaphalocrocis medialis larvae with the third and fourth generation in rice field.