摘要
水稻二化螟是危害湖南耒阳市水稻的重要害虫,受气候、耕作制度、害虫抗药性及施药方法等因素的影响,二化螟近年在该市中晚稻田爆发,严重危胁水稻生产安全和质量安全。对二化螟越冬基数与气象因子的相关性研究表明:越冬基数与上年10月至当年2月期间的日平均气温和>12℃有效积温呈正相关,与当年1、2月的降雨量和相对湿度呈负相关,与上年第四代幼虫密度和当年一代幼虫密度呈正相关;通过回归分析建立气象因子与越冬基数的回归模型,为二化螟的预测预报、发生趋势以及可持续综合治理提供科学依据。
Chilo suppressalis is an important pest of rice in Leiyang City.It is affected by the factors of climate,farming system,insecticide resistance and pesticide application.In recent years,the rice borer in rice field broke out in the middle and late rice fields of Leiyang City,and the production safety and quality safety of rice seriously threatened.The correlation between the winter cardinality and the meteorological factors showed that the base number of the overwintering was positively correlated with the average daily temperature and the effective accumulated temperature of above 12℃from last October to this February,and was negatively correlated with the rainfall and relative humidity in January and February of the year,and was positively correlated with the density of the fourth generation larvae of the previous year and the density of the first generation of the year.Through regression analysis,the regression model of meteorological factors and overwintering base number was established to provide scientific basis for the forecast,trend and sustainable comprehensive control of the insect.
作者
刘波
陈小虎
吴岵
谷云勇
文亮
严涛
曹国华
朱卫华
LIU Buo;CHEN Xiao-hu;WU Hu;GU Yun-yong;WEN Liang;YAN Tao;CAO Guo-hua;ZHU Wei-hua(Leiyang Meteorological Bureau,leiyang 421800,PRC;Leiyang Agriculture Bureau,Leiyang 421800,PRC)
出处
《湖南农业科学》
2018年第7期58-61,共4页
Hunan Agricultural Sciences
基金
湖南省气象局短平快课题(XQKJ18B014)
关键词
气象因子
二化螟
越冬基数
水稻
耒阳
meteorological factors
Chilo suppressalis
overwintering base number
rice
Leiyang
