Diagnosis And Management Of 'Danzazzalau' Disease Of Onion (Allium Cepa L.) In Kebbi State, Northwest Nigeria

📄 Project Abstract

Onion is an important vegetable crop in Nigeria grown in both wet and dry seasons though it fetches higher profit when cultivated in the dry season. The crop yield is limited by some production constraints, notable of which is the "Danzazzalau disease in Kebbi State. Fungi isolated from infected pseudostem and roots of onion were Fusarium sp. and Thielavia sp. Pathogenicity test was conducted using these fungi and Fusarium sp. proved to be pathogenic on 6-week old onion seedlings. Fusarium sp. was identified as a Fusarium species belonging to biological group clade V. by Centre for Agriculture and Bioscience International (CABI), Egham, Surrey, United Kingdom. Trials were carried out in the screenhouse and field during 2015 dry season at Samaru, Zaria to study the effects of water regimes, manure rates and mulch treatments for the management of "Danzazzalau disease of onion crop. The treatments consisted of three water regimes (3, 10 and 21-day), three manure rates (0 Kg/plot, 40 Kg/pl...