江西农业大学学报Issue(1)：84-90,7.
江西省鄱阳湖平原双季稻区稻水象甲种群动态分析
Population Dynamics Analysis of Rice Water Weevil in Double Rice Regions in Poyang Lake Plain of Jiangxi Province
摘要
Abstract
The occurrence law of rice water weevil ( RWW) was investigated in Leping City ,Jiangxi Prov-ince.The results indicated that the RWW occurred 2 generations per year in the double rice regions of Poyang Lake plain in Jiangxi Province .The RWW began to come out from the overwintering places when the tempera-ture was over 13 ℃,and then migrated to the fields .April 15th was the peak time of their coming out of the ground ,April-end was the peak of the adults ’ migration to the fields .The peak occurrence of adults in the fields was in the period from April-end to early May .The final stage of adults in the fields was in early June .A-dults of RWW oviposited and larvas hatched in May ,the peak of larva incubation was in early and middle May . Pupae occurred from early June ,and the pupation was in the middle ten days of June .The first generation a-dults emergenced from June ,and the peak emergence was in the middle ten days of July .The final stage of the first generation adults was in early August ,a few adults stayed in the fields to form the source of the second gen-eration in late rice season .The average of field insects was 22.95 per 100 hills of rice in 2011,the loss percentageof rice was 18%to 20%;the number of insects in the seriously damaged plots was 49.25 per 100 hills,the loss percentage of rice was 30%-35%.The occurrence area of Lissorhoptrus oryzophilus Kuschel in Jiangxi Province from 2007 to 2010 was expanded ,but the annual growth rate had a little decline compared with that in the past .关键词
稻水象甲/双季稻/种群动态/发生规律Key words
Lissorhoptrus oryzophilus Kuschel/double-crop rice/population dynamics/occurrence law分类
农业科技引用本文复制引用
张锋,徐国平,宋建辉,王建国..江西省鄱阳湖平原双季稻区稻水象甲种群动态分析[J].江西农业大学学报,2014,(1):84-90,7.基金项目
国家自然科学基金项目（30960223）和江西省植保植检局横向课题 （）
