Foliar blight of Roselle and its effect on yield in tropical forest region of southwestern Nigeria.
The etiology of foliar blight of roselle and its effect on yield in the tropical forest of southwestern Nigeria was investigated. More than 40% of leaves of roselle plants in fields under continuous cultivation (endemic plots) were blighted by Phyllosticta hibiscini. However, no infection was found on roselle plants in fields never previously planted with roselle. Over 20% leaf yield loss and over 34% edible leaf loss were due to leaf blight. The mean marketable and biological yield loss of calyces in 1999 and 2000 were 35% and 38% respectively, while seed yield loss was 30% and 32%.
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Institute of Agricultural Research and Training Obafemi Awolowo University, Moor Plantation, PMB 5029, Ibadan, Nigeria. drart@infoweb.abs.net
D001203:Ascomycota / Q000254:growth & development*; D031584:Hibiscus; D009549:Nigeria; D010935:Plant Diseases / Q000191:economics / Q000382:microbiology*; D018515:Plant Leaves; D012639:Seeds; D014329:Tropical Climate