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Distribution of Common Maize Diseases and Molecular Characterization of Maize Streak Virus in Kenya

Author

Listed:
  • Alice K. Charles
  • William M. Muiru
  • Douglas W. Miano
  • John W. Kimenju

Abstract

Maize is an important food crop in Kenya and is susceptible to a wide range of diseases. A survey was conducted in 2012 in different agro-ecological zones (AEZ) of Kiambu, Embu and Nakuru counties to determine the distribution of northern leaf blight (NLB), common rust (CR), maize streak disease (MSD), gray leaf spot (GLS), head smut (HS) and common smut (CS). Data collected included prevalence, incidence and severity of each of the diseases. Maize leaf samples infected with MSD were also collected for molecular characterization of Maize streak virus (MSV). Northern leaf blight was reported in all counties surveyed with 100% disease prevalence. Kiambu had the highest incidence (100%) of CR whereas Embu had the highest prevalence (45%) of MSD. The incidences of GLS and HS were very low with averages of below 2.5%. The highest incidence of GLS was in Kiambu (5%). High altitude areas had higher incidences of NLB and GLS while CS and MSD were widespread in the three counties. Comparison of 797 nucleotides from the open reading frame (ORF) C2/C1 of MSV with other sequences from the GenBank showed sequence similarities of 99 to 100% with MSV-A strain. The study revealed that the major foliar diseases of maize are widespread in Kenya and therefore there is need to institute measures to manage these diseases and reduce associated losses. Also, the high percent sequence similarities of MSV indicate low variability which is good for breeders since developed resistant varieties can be adopted over a wider region.

Suggested Citation

  • Alice K. Charles & William M. Muiru & Douglas W. Miano & John W. Kimenju, 2024. "Distribution of Common Maize Diseases and Molecular Characterization of Maize Streak Virus in Kenya," Journal of Agricultural Science, Canadian Center of Science and Education, vol. 11(4), pages 1-47, April.
    • Handle: RePEc:ibn:jasjnl:v:11:y:2024:i:4:p:47
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    References listed on IDEAS

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    1. Darren Martin & Dionne Shepherd, 2009. "The epidemiology, economic impact and control of maize streak disease," Food Security: The Science, Sociology and Economics of Food Production and Access to Food, Springer;The International Society for Plant Pathology, vol. 1(3), pages 305-315, September.
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    More about this item

    JEL classification:

    • R00 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - General - - - General
    • Z0 - Other Special Topics - - General

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