2012年四川省稻飞虱大发生特点及原因分析

Analysis of the Unusual Occurrence of Rice Planthopper in Sichuan Province in 2012

2012年是四川省稻飞虱发生面积、发生程度最重的一年。针对这种特殊发生年份进行发生特点及原因分析,有利于掌握四川稻飞虱的迁飞发生规律。通过四川省56个监测站点进行灯下虫情(每日)、田间虫情(每周一次)及发生面积调查,结合稻飞虱发生期间天气情况,对稻飞虱的迁入、发生特点及原因进行了分析。结果表明,2012年四川省稻飞虱发生具有迁入时间特别早、迁入峰次多、灯下田间虫量大、发生面积大等特点,其主要原因是由于境外虫源基数大,根据工作经验判断作为四川省虫源地的广西虫量大以及四川省2012年5—7月气候条件有利于稻飞虱的迁飞、繁殖。本研究分析得出了稻飞虱在四川盆地内的迁飞发生规律,讨论了四川加强稻飞虱研究的重要性。

2012 was the most serious year of rice planthopper occurrence area and degree in Sichuan Province. To analyze the occurrence characteristics and causes in the special year was beneficial to grasp the migratory law of rice planthopper in Sichuan. In this study,we investigated the insect pest situation under the lamp（everyday）,insect pest situation of field（once a week）,occurrence area and climatic conditions by 56 monitoring point to analyzed the immigration,occurrence characteristics and causes of rice planthopper in Sichuan. The results showed that the occurrence of rice planthopper in Sichuan had the characteristics of immigration time earlier,more immigration peak,more quantity of insect pest under the lamp and in the field,and larger occurrence area,which caused by the huge initial population of rice planthopper in the foreign country and Guangxi Province（as an insect source based on our work experience）,and the suitable climatic conditions for migration and breeding from May to July in 2012. This study analyzed the migratory law of rice planthopper occurred in the Sichuan Basin,and discussed the importance of strengthen the rice planthopper research in Sichuan.