Browsing Doctoral Degrees (Plant Pathology) by Advisor "Aveling, Theresa Ann Sheila."
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(1993)During surveys in South Africa, Alternaria porri (Ellis) cif. and Stemphylium vesicarium (Wallr.) E. Simmons were found to be destructive seed-borne pathogens of onion (Allium cepa L. ). These two pathogens are also ...