Screening of sorghum (Sorghum bicolor) genotypes for resistance to covered kernel smut (Sporisoriumsorghi) disease

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ABSTRACT

Covered kernel smut of sorghum caused by Sporisoriumsorghi is a major threat to sorghum production globally. This pathogen has been reported to attack sorghum resulting in yield losses as high as 75% on susceptible sorghum genotypes in Zimbabwe. Twelve sorghum genotypes were screened to determine the incidence and severity of covered kernel smut during the 2014/15 growing season. The trial was done under field conditions, where two artificial inoculation techniques namely seed dressing with dry teliospores and stem injection were used to observe the reaction of the sorghum genotypes. The experiment was set up using Randomised Complete Block Design with three replicates in the field. The disease incidence was highly distributed and it varied significantly (p

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