Epidemiology, Molecular Characterization And Yield Loss Assessment Of Rice Due To Rice Yellow Mottle Sobemovirus In Northern Nigeria

📄 Project Abstract

Screenhouse and field experiments were conducted between 2008 and 2010 to quantify yield loss due to Rice yellow mottle virus (RYMV) in some selected rice cultivars; determine the epidemiology of RYMV in relation to weather factors on the incidence of RYMV and insect vector population composition and identification studies; identify its alternative hosts; determine serotypes of the pathogen; and molecular characterization of the strains and their distribution in the northern states of Nigeria. The screenhouse experiment was arranged in a strip plot design with three replicates. Significant interaction between the effects of inoculation regimes and rice cultivars were found between the disease, growth and yield parameters. The critical periods of RYMV infection for most of the rice cultivars used was within 4 - 8 Weeks after sowing (WAS). Paddy yield losses of 6.59 - 79.11 % and 3.65 - 81.67 % were recorded on the test cultivars in rainy and dry seasons, respectively. Keeping the plants...