在华农实验农场设置病圃,分区块重复分别接种大、小斑病、茎腐病、纹枯病、褐斑病和自然发生斑点病。从1980～1982年鉴定生产上推广的玉米杂交种和其亲本,以及培育中的材料共260份。其中多数抗3～4种病害;少数不抗到抗1～2病害,以至抗5～6种。湖北省低山地区推广三系杂交种“唐五”中抗到抗大、小斑病、茎腐病、褐斑病、斑点病,感纹枯病;二高山地区推广单交种“恩单2号”中抗大斑,中感小斑,中抗到中感茎腐、纹枯,中抗到抗褐斑和斑点。在培育中的新自交系“唐Mo17Ht_1cms-S”和“77cms-C”中抗到抗6种病害。根据国内外资料分析了抗小斑病材料“Mol7”含有加性显性抗病基因,并兼抗褐斑病;抗大斑病材料中包含Ht类加性显性抗病基因,以及抗茎腐病的多抗基因。又根据调查,讨论了进一步培育多抗材料,结合宽窄行套种、改夏播为春播、增施氮磷钾肥料、培土作垅等耕作栽培制度,保持和提高玉米品种的多种病害抗病性。 Nursery plants were set up in Hua Nong Experimental Farm and were repeatedly inoculated with large and small leaf spot, stalk rot, sheath blight, brown spot and naturally occurring spot disease respectively. A total of 260 maize hybrids, their parents, and cultivated materials were identified from 1980 to 1982. Most of them are resistant to 3 ~ 4 diseases; a few do not resist to 1 ~ 2 diseases and even 5 ~ 6 kinds of anti-diseases. Low-mountain areas in Hubei Province to promote three-line hybrid “Tang five” resistance to large, small spot disease, stalk rot, brown spot, spot disease, flu sheath blight; No. 2 “in the resistance to large spots, small flu in the sense of resistance to the sense of stem rot, wrinkles, resistance to brown spots and spots. The new inbred line ”Don Mo17Ht_1cms-S“ and ”77cms-C“ were resistant to 6 kinds of diseases. According to the domestic and foreign data, the anti-Smaller-disease material ”Mol7" ​​contained the dominant Dominant resistance gene and the resistance to brown spot disease. The anti-Smaller-disease material contained the Ht plus dominant Dominant disease resistance gene, Rot disease polyclonal genes. According to the survey, we discussed the further cultivation of multi-resistant materials, combined with narrow-width interplanting, change of summer sowing for spring sowing, increasing N, P and K fertilizers and cultivation of soil for cultivating and cultivating so as to maintain and improve disease resistance of maize varieties .