During 2012-2013,a total of 165 maize germplasms introduced from abroad had been identified and evaluated for resistance to northern corn leaf blight,gray leaf spot and Curvularia leaf spot.The results showed that the introduced maize germplasms demonstrated significant difference in resistance to the above 3 kinds of maize leaf spot.Most of the germplasms were susceptible or highly susceptible to the diseases and only a small part of the germplasms were resistant to the diseases.The resistant germplasms we...