在江苏省如东县,甜菜夜蛾为偶发性暴发害虫,近几年受种植业结构调整及气候等因素的影响,其发生程度有加重趋势。2013年由于连续高温干旱,加上花椰菜、小葱等蔬菜面积扩大且连片种植,该虫在本地小葱、花椰菜、棉花等多种作物上暴发,对本地蔬菜及其他经济作物构成很大威胁。1发生特点1)2013年该虫发生量大,是近几年来发生最重的一年。6月20日开始见蛾,田间共出现6次蛾 In Rudong County, Jiangsu Province, Beet armyworm is a sporadic outbreak of pests. In recent years, it has been affected by structural adjustment of crop industry and climate. In 2013, continuous high temperature and drought, coupled with the expansion and contiguous planting of vegetables such as cauliflower and shallot, caused the outbreak of local vegetables and other cash crops in areas such as shallot, broccoli and cotton. 1 Occurrences 1) The occurrence of the pest in 2013 was the heaviest in recent years. June 20 began to see the moths, the field appeared a total of 6 moths