Occurrence, Sporulation and Pathogenicity Studies with Glomerella Cingulata Associated with Crown Rot of Boxed Bananas
- 12 September 1966
- journal article
- research article
- Published by Taylor & Francis in Mycologia
- Vol. 58 (3) , 397-405
- https://doi.org/10.1080/00275514.1966.12018331
Abstract
Perithecia and acervuli of Glomerella cingulata occur on all above-ground parts of the banana plant in Honduras but are more abundant on the persistent bracts. Perithecia and acervuli were most abundant in the wet season; few were found during the hot, dry period. Ascospore discharge required moisture or long exposure to 100% relative humidity. Perithecia discharged viable ascospores in diminishing quantities during 6 weeks of periodic wetting and drying. Maximum germination of ascospores occurred in 6 hr at 100% relative humidity at which time 80% of the ascospores had formed appressoria. Mature perithecia were formed on bract tissue 6 days after inoculation, but failed to form at temperatures of 30 C or above although conidia form abundantly at 30 and 32 C. Mycelial growth was retarded at 35 C. The isolates varied in cultural characteristics and pathogenicity to banana crown tissue.Keywords
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