Analysis of Adult Population Dynamics and Physical Control Benefit of Spodoptera frugiperda in Zhaotong of Yunnan Province in 2021
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.
Fall armywormadult population dynamicsphysical inducementZhaotong,Yunnan
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