云南昭通市2021年草地贪夜蛾成虫种群动态及物理防控效益分析

Analysis of Adult Population Dynamics and Physical Control Benefit of Spodoptera frugiperda in Zhaotong of Yunnan Province in 2021

草地贪夜蛾(Spodoptera frugiperda)自入侵以来就对中国粮食生产安全造成巨大的威胁,明晰昭通市草地贪夜蛾种群动态、采取有效防控措施是粮食生产安全的重要保障。2021年对云南省昭通市草地贪夜蛾成虫动态进行全年定点监测,并建立防控示范区对防控方案进行对比研究。结果表明:(1)昭通市的草地贪夜蛾成虫于3月1日起开始陆续出现;出现时序由西南向东北发展;(2)草地贪夜蛾成虫发生主要集中在巧家县、鲁甸县、永善县、彝良县、昭阳区和大关县;(3)昭通市西南部巧家县和永善县4—6月为草地贪夜蛾种群数量最多时期,鲁甸县、彝良县、昭阳区8月出现大量草地贪夜蛾迁入;(4)性诱、灯诱、性诱+灯诱混合防控的物理诱控方式能够显著降低草地贪夜蛾的危害,减少玉米产量损失,其中性诱+灯诱混合防控方式效果最为显著。

Fall armyworm(Spodoptera frugiperda)has posed a great threat to food production security in China since its invasion.It is of great significance for food production security to understand local population dynamics of fall armyworm and take effective prevention and control measures.In this study,the dynamics of fall armyworm adults in Zhaotong,Yunnan Province had been monitored throughout the year in 2021,and a control demonstration area was established to conduct a comparative study on prevention and control schemes.The results showed as follows:(1)The adult fall armyworm began to appear on March 1st in Zhaotong;The occurrence time sequence developed from southwest to northeast.(2)The occurrence of adult fall armyworm was mainly concentrated in Qiaojia County,Ludian County,Yongshan County,Yiliang County,Zhaoyang District and Daguan County.(3)The largest population period was observed in Qiaojia County and Yongshan County in the southwest of Zhaotong from April to June,and a large number of fall armyworm migrated into Ludian County,Yiliang County and Zhaoyang District in August.(4)The physical inducement of fall armyworm by sexual attraction,searchlight trap and mixed measurement of sexual attraction+light trap could significantly reduce the harm of fall armyworm and diminish the loss of maize yield.The mixed measurement had the most significant controlling effects.