Darangwa, Ratidzo An investigation of the effects of certified and non certified seeds on occurence of tuber and leaf diseases in potatoes during their production cycle / Ratidzo Darangwa. - Filabusi : GSU, 2023 - xii, 45 pages : illustrations ; 30 cm. Dissertation (BSc)..... GSU 2023 Includes bibliographical references. Subjects--Topical Terms: Vegetables--Diseases and pests LC Class. No.: SB608.V4 / DAR