Diagnosis and Management of ‘Danzazzalau’ Disease of Onion (Allium Cepa L.) in Kebbi State, Northwest Nigeria

Description

– Diagnosis and Management of ‘Danzazzalau’ Disease of Onion (Allium Cepa L.) in Kebbi State, Northwest Nigeria –

Download Diagnosis and Management of ‘Danzazzalau’ Disease of Onion (Allium Cepa L.) in Kebbi State, Northwest Nigeria. Agricultural Science students who are writing their projects can get this material to aid their research work.

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.

Introduction

Onion (Allium cepa L.) belongs to the family Alliaceae, it is a monocotyledonous, cross-pollinated crop cultivated mainly as a cool season vegetable (Jilani and Ghafoor, 2003). The crop is grown in most regions of the world, with China, India and United States of America being the largest producers (FAOSTAT, 2014).

In Nigeria, 1.32 x 106 mt are produced on 42,000 hectares of land which makes it ranks fourth after Egypt, Algeria and Morocco in Africa (FAOSTAT, 2014). Profitable production of onions is favoured by the inclement conditions obtained around the northwestern region of Nigeria.

Reports of the National Agricultural Extension and Rural Liaison Services and Federal Department of Agricultural Extension (FDAE) in 2015 showed that the rich alluvial deposits along the River Niger provide suitable soil for its cultivation.

The 119.10 x 103 and 109.90 x 103 mt estimates at Sokoto and Kebbi States respectively in 2014 are highest throughout the country.

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