Claim · model-written summary
Disease severity in the surveyed cassava fields ranged from no disease to highly affected stems with more than 15 lesions per stem.
- Taxon
- Cassava
Manihot esculentat0 - Outcome
- severitye0
- Value
- >15 lesions per steme0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cassava”
e0“severity from no disease to highly affected (>15 lesions per stem)”
Title
First Report of Curvularia lunata Associated with Stem Disease of Cassava
W. Msikita; J. S. Yaninek; M. Ahounou; et al. Plant Disease 1997. doi:10.1094/pdis.1997.81.1.112a
Other claims from this paper (10)
- Observation In surveys of cassava fields in south Ghana and southeast Nigeria, stems of some cassava genotypes were covered by grayish brown lesions, mainly on lignified stem portions.
- Observation Field disease incidence in the surveyed cassava fields ranged from 0 to 80%.
- Observation The pathogen isolated from infected cassava stems was identified as Curvularia lunata, confirmed by the International Mycological Institute.
- Intervention effect Wound- or nodal-inoculation of stem pieces of four cassava cultivars with C. lunata mycelial plugs produced lesions and bud necrosis similar to field symptoms on all inoculated plants within 1 month, while control plants stayed symptom-free.
- Intervention effect Symptom development after inoculation was quicker (2 to 3 weeks) on wound-inoculated cassava stems than on nonwounded stems.
- Observation Mortality of artificially wound-inoculated cassava buds ranged between 30 and 100%, depending on genotype and manner of inoculation.
- Observation Artificially infected cassava stem and bud portions plated on PDA consistently yielded C. lunata.
- Association When cassava buds were completely colonized, sprouting was completely inhibited.
- Association Partially colonized cassava buds sprouted, but growth was reduced by 20 to 50% (depending on genotype) compared with healthy stems.
- Observation This is reported as the first report of C. lunata being pathogenic on cassava.