Crown rot fungi of Nigerian bananas cv. Robusta and the effects of benomyl on their exo-enzymes
✍ Scribed by Dr. V. W. Ogundero
- Publisher
- John Wiley and Sons
- Year
- 1987
- Tongue
- English
- Weight
- 326 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0233-111X
No coin nor oath required. For personal study only.
✦ Synopsis
Eight species of fungi were consistently obtained from crown rots of Nigerian bananas cv. Robusta. The predominant species were Botryodiplodia theobromae PAT. and Colletotrichum musae (BERK. & CURT) VON h x . Others include: Ceratocystis paradoxu (DADE) C. MOREAU, Pusarium aolani (MART.) SACC., Fusarium roseum SAYD. & HANS, Fusarium moliniformae SHELDON, Fusarium oxysporum SCHLECHT and Verticillum theobromae (TuRc.) MASON & HUQHES. Growth-temperature relations showed that B. theobromae and C. muaae grew best at 30 "C within the %day incubation
period. Both fungal species produced extracellularly, amylases, pectin (methyl) esterase and CM-cellulases. The synthesis of these enzymes was completely inhibited b y the presence of the fungicide benomyl a t concentrations of 200 pprn and above in the growth medium. At lower concentrations (50-150 pprn), pectin esterase and CM-cellulase production was also suppressed while amylases were produced in measurable amounts.