These results show that ACB and ECB are sympatric in the Zhangjiakou area of Hebei Province and it is very likely that a small number of ECB coexist with ACB on corn plants.

• 研究结果证实张家口为亚洲玉米螟和欧洲玉米螟混生区 ,而且在玉米中很可能有少量欧洲玉米螟与亚洲玉米螟混生。