Yobo, Kwasi Sackey.Dammie, Nompumelelo.2017-05-182017-05-1820172017http://hdl.handle.net/10413/14521Master of Science in Plant Pathology. University of KwaZulu-Natal, Pietermaritzburg 2017.Abstract available in PDF file.en-ZABiological control.Gray leaf spot.Pyricularia grisea.Silicon.Biological control of gray leaf spot (Pyricularia grisea (cooke) sacc.) of ryegrass.Thesis