6Halisky P M,Smektzer D C. Disease of corn, sorghum andsudangrass head smut established in California[J]. Califor- nia agriculture, 1961,1 .. 10-12.
7Njuguna J G M,Njoroge P G,Jama A N. Epidemiology and maize crop resistance to head smut disease with reference to small-scale maize-dairy farmers in Central Kenya[C]. The BCPC International Congress: Crop Sciencend Technology, 2003 : 999-1004.
8Paeheco A C. Dittrieh R C. Resistance of commercial maize hybrids to head smutEJ]. Agropeeuaria Catarinense, 1999, 12(2) :44-45.
9Manninger I. Breeding maize for resistance to common smut and head smut and to stalk and ear rotsl-J]. Agrartu- domanyi Kozlemenyek, 1978,37(2) .. 175-177.
10Bernardo R, Bourrier M, Olivier J L. Generation means a- nalysis of resistance to head smut in maize[J]. Agronomie, 1992,12:303-306.
