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In order to practice integrated management of corn insect pests effectively,a field experiment was made to study the resistances of 33 corn varieties to corn borer(Ostrinia furnacalis)in the corn area to the north of the Huaihe River in Anhui Province.The results showed that there were evident differences in resistances of different corn varieties to corn borer and the resistant levels of the same corn variety to corn borer were also different in the whorl stage and the ear stage.In the whorl stage of corn,eight corn varieties,‘Zhongnongda 311’,‘Zhongke 11’,‘Denghai 3’,‘Dongdan 80’,‘Liyu 16’,‘Zhengdan 23’,‘Jidan8’and‘Huayu 13’preformed relatively stronger resistance to corn borer.In the ear stage of corn,five corn varieties of‘Xundan 20’,‘Qidan 1’,‘Zhongke4’,‘Nongda 108’and‘Ludan 6018’showed relatively stronger resistance to corn borer.The comprehensive resistances of ten corn varieties to corn borer in the whorl stage and the ear stage successively were‘Zhongnongda 311’> ‘Zhongke 4’> ‘Jidan 8’> ‘Zhengdan 23’> ‘Zhengdan 958’> ‘Qidan 1’>‘Zhongdi 985’> ‘Nongda 108’> ‘Liyu 16’> ‘Denghai 3’.
In order to practice integrated management of corn insect pests effectively, a field experiment was made to study the resistances of 33 corn varieties to corn borer (Ostrinia furnacalis) in the corn area to the north of the Huaihe River in Anhui Province. The results showed that there were significantly different in resistances of different corn varieties to corn borer and the resistant levels of the same corn variety to corn borer were also in the whorl stage and the ear stage. the whorl stage of corn, eight corn varieties, ’ Zhongnongda 311 ’,’ Zhongke 11 ’,’ Denghai 3 ’,’ Dongdan 80 ’,’ Liyu 16 ’,’ Zhengdan 23 ’,’ Jidan 8’and’Huayu 13’preformed relatively stronger resistance to corn borer. In the ear stage of corn, five corn varieties of’Xundan 20 ’,’ Qidan 1 ’,’ Zhongke4 ’,’ Nongda 108’and’Ludan 6018’showed relatively stronger resistance to corn borer. The comprehensive resistances of ten corn varieties to corn borer in the whorl stage and the ear stage successively were’Zho ’nongda 108’> ’Nongda 108’> ’Liyu 16’> ’Denghai 3’. ngnongda 311 ’>’ Zhongke 4 ’>’ Jidan 8 ’>’ Zhengdan 23 ’>’ Zhengdan 958 ’>’ Qidan 1 ’>’ Zhongdi 985 ’>’ Nongda 108 ’>’