2010—2021年河南漯河玉米螟和桃蛀螟种群动态演变

Population dynamics of Ostrinia furnacalis and Conogethes punctiferalis in Luohe,Henan,2010-2021

全球性气候变化和本地耕作制度的改变给害虫发生带来极大影响,导致一些害虫种群和数量发生了明显变化,长期监测作物上害虫的发生动态对探索其演变规律和防治具有重要意义。本研究分析近10年玉米上两种重要害虫玉米螟和桃蛀螟在河南漯河的成虫种群动态,同时调查了玉米田间两种害虫幼虫的发生数量。结果表明,玉米螟和桃蛀螟在漯河地区常年发生3代,其中第2代蛾数量最高,分别占全年虫量的63.3%和79.3%,发生高峰期分别在8月上旬至9月中旬和8月中旬至9月中旬。桃蛀螟的年度发生量特别是第2代蛾的发生量呈增加趋势,2016—2021年第2代蛾发生量显著高于玉米螟。桃蛀螟幼虫发生量明显增加,2019—2021年发生量高于玉米螟。综上所述,近10年漯河地区玉米田桃蛀螟发生呈增加趋势,一些年份发生量已经超过玉米螟。

Changes in global climate and local tillage practice had brought about huge impacts on the occurrence of pests,resulting in significant changes in the population and quantities of some pests.Long-term monitoring of the occurrence dynamics of pests on crops is of great significance for exploring pest development and prevention.In this study,the population dynamics of adult Ostrinia furnacalis(Guenee)and Conogethes punctiferalis(Guenee),two important pests of corn,were analyzed over the last decade.The number of larvae of the two pests in corn fields was also investigated.The results showed that O.furnacalis and C.punctiferalis both had three generations per year in Luohe,and the number of the second generation was the highest,accounting for 63.3%and 79.3%of the annual population,respectively.The peak periods were from early August to mid-September and from mid-August to mid-September,respectively.The annual occurrence of C.punctiferalis,especially the quantities of the second-generation moths,showed an increasing trend.The trapping numbers of the second-generation moth of C.punctiferalis surpassed that of 0.furnacalis from 2016 to 2021.The occurrence of C.punctiferalis larvae increased significantly,and the occurrence from 2019 to 2021 was higher than that of O.furnacalis.In summary,the occurrence of C.punctiferalis increased significantly in the last decade and surpassed O.furnacalis in some years.