江西滨湖平原虾稻连作模式二化螟发生防治现状及防控探究——以江西省恒湖垦殖场为例

Current Situation of Chilo suppressalis Occurrence and Control in Shrimp-rice Cropping Pattern in Lakeside Plain of Poyang Lake,Jiangxi Province:Taking Henghu Reclamation Farm in Jiangxi Province as an Example

【目的】为江西滨湖平原虾稻连作稻田二化螟绿色防控提供可行性技术指导,稳健推进虾稻连作模式绿色可持续发展。【方法】对鄱阳湖滨湖平原虾稻连作模式区,稻田二化螟生活习性及越冬寄主、发生及防治现状、秋末冬前田间灌水养虾对二化螟越冬幼虫生活的影响等情况,开展系统调查。【结果】江西滨湖平原虾稻连作模式区二化螟已呈现重发爆发态势,安全、高效、低毒防治药剂种类少,生物农药对其防治效果较低、见效缓慢、及时控害难;秋末田间灌水养虾后,稻桩茎秆内越冬幼虫呈假死状随田水风浪转移到田外杂草间另觅寄主越冬,淹灭死亡效果低。【结论】基本摸清了虾稻连作模式区二化螟特有的生活习性及活动规律,并总结和探讨了江西滨湖平原虾稻连作模式稻田二化螟绿色防控对策。

[Objective]This study was conducted to provide feasible technical guidance for green prevention and control of Chilo suppressalis in shrimp-rice cropping fields in Lakeside Plain of Poyang Lake,Jiangxi Province,and to steadily promote the green and sustainable development of the shrimp-rice continuous cropping model.[Method]Systematic investigation was conducted in the shrimp-rice continuous cropping areas in Lakeside Plain of Poyang Lake,into the living habits and overwintering hosts of C.suppressalis,the current situation of its occurrence and control,as well as the impacts of irrigation and shrimp farming on the overwintering larval life of the borer in the fields before the end of autumn and winter.[Result]The shrimp-rice cropping areas witnessed a heavy outbreak of C.suppressalis in Lakeside Plain of Poyang Lake.There were less variety of safe,efficient,and low-toxic control agents,with low and slow control effects of biological pesticides,and so timely control of the damage was difficult.In Autumn,after the field irrigation and shrimp farming,overwintering larvae in rice pile stalks were pseudo-dead,and transferred outside the field and between weeds with the field water wind and waves to find other hosts for overwintering,and so the drowning effects were low.[Conclusion]Basically,the unique habits and activity patterns of C.suppressalis in the shrimp-rice cropping areas were figured out,and green prevention and control countermeasures against the borer in the rice fields of the shrimp-rice cropping were summarized and discussed.