Int. J. Biosci.11(2), 170-175, August 2017
Maize ear rot disease is caused by Stenocarpella maydis and other ear rot fungus that work in a complex relationship. The disease lowers the quality of the maize cob and grains. Before this study, there was no documented report on the susceptibility of the 9 selected genotypes namely; EH10, EH14, EH15, P3253, H614D, EH13, H516, H515 and EHI6 to S. maydis, therefore information gained on the response of these genotypes to S. maydis would be helpful not only in determining resistance of the 9 genotypes but also provide useful information in the continuous evaluation of germplasm for ear rot resistance. Investigations were conducted on the genotypes that were planted between September – December 2014 and February – July 2015 in the Maseno University farm and analysis conducted at the botany laboratory located within geographical coordinates; 0 1’0’’ S, 34 36’0’N at an altitude of 1503 meters above sea level. The experimental design was Alpha lattice, replicated thrice with nine hybrids. The mean severity scores level for the 9 hybrids was 1.98. EH10, EH14, EH15, and P3253 hybrids were resistant to S maydis H614D, EH13, H516, H515, EHI6 hybrids susceptible to the S. maydis ear rot fungus. S. maydis was also found to be the main ear rot causing fungus in Maseno University farm constituting (8-9%) while Nigrospora caused highest severity score of 3.
Bansiger M, Vivek BS. 1997. Field book: software for managing a maize breeding programme. CIMMYT Mexico.
Christensen JJ, Wilcoxson RD. 1967 Stalk rot of corn. Monograph of the America. Phytopathological Society 3, 59.
Dhanraj KS. 1966. Dry rot maize caused by Diplodia macrospora-.Indian- Phytopathology 19, 120.
Dorrance AE, Hinkelman KH, Warren HL. 1998 Diallel analysis of Diplodia ear rot resistance in maize. Plant Disease 82, 699-703.
Flett BC, Mclaren NW, Wehner FC. 2001. Incidence of Stenpcarpella maydis ear rot of corn under crop rotation systems. Plant disease 85, 92-4.
Flett BC, Van Rensburg JB. 1992. Effect of Busseola fusca on the incidence of maize ear rot caused by Fusarium moniliform and Stenocarpella maydis. In South Africa journal of plant soil 9, 177-179.
Mac Donald MV, Chapman R. 1997.The incidence of Fusarium moniliforme on maize from Central America, Africa and Asia during 1992-1995.
Olantinwo RK, Cardwell A, Menkir M, Julian A. 2004. Inheritance of Resistance to Stenocarepalla (Earl) Ear Rot of Maize in the Mid-Altitude Zone of Nigeria European Journal of Plant Pathology 105, 535-43.
Patterson HD, Williams ER. 1976. A new class. of resolvable block designs in biometrika 63, 83-92.
Sutton BC, Waterston JM. 1966. Diplopodia maydis. CMI Descriptions of Pathogenic Fungi and Bacteria No.84 CAB International, Wallingford UK.
Vincelli P. 2003. Ear Rot of Corn Caused by Stenocarpella maydis (=Diplodiamaydis) University of Kentucky Cooperative Extension Service. Datasheet PPA- 43 www.ca.uky. edu/agc/pubs/ppa/ ppa43.pdf
Walker JC. 1969. Plant pathology (3rd edition), Pp335,341. Mc Graw-Hill, New York, USA. Zad, J.; Ale Agha, N. (1985) A note on the mycoflora of maize in Iran.