Abstract
Abstract A survey was conducted in southern Tanzania to determine the relationship between above‐ground symptoms of cassava brown streak virus (CBSV) infection and root necrosis which is often associated with the disease. CBSV symptoms were found in 62 of the 64 fields sampled. Seventy‐nine per cent of plants with above‐ground symptoms of CBS also exhibited root necrosis, compared with only 18% of plants with no visible symptoms of CBSV. No fungi were isolated on acidified water agar from more than half the root samples taken from plants with root necrosis. Where fungi were isolated they represented a range of common soil‐borne fungi, and no single fungus predominated. No evidence could therefore be found to indicate a cause of root necrosis other than brown streak virus. Some varietal differences in response to CBSV were apparent from the survey and at least one variety developed above‐ground symptoms but not root necrosis.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
