Abstract
Two new diseases of cassava were discovered in Benin, Ghana, and Nigeria. Curvularia leaf and stem blight [Curvularia lunata (Wakker) Boedijn) was discovered in all three countries. In the field incidence of Curvularia-infected plants ranged between 0 and 80%, and severity between 2 and 25 lesions per plant. The effect of the fungus on growth was investigated using six cultivars, all naturally infected. For all cultivars, when buds were completely colonized, sprouting was completely inhibited. However, partially colonized buds sprouted, but growth was reduced by 20-50% (depending on genotype), compared with healthy stems. On artificially inoculated leaves, C. lunata induced lesions of up to 1.5 cm and 40% leaf abscission, compared with healthy leaves. Nattrassia mangiferae (Syd. & P. Syd.) B. Sutton & Dyko root and stem rot was discovered in Benin and Nigeria, with field incidence ranging between 0 and 54%. For all four cultivars, N. mangiferae significantly reduced the number of shoots, shoot growth, and number of roots. Two of the cultivars died three weeks after planting.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 13
Claim · model-written summary
Two new cassava diseases were found in three West African countries.
- Taxon
- cassava
Manihot esculentae0 - Outcome
- Two new diseasese0
- Setting
- Benin, Ghana, and Nigeriae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two new diseases of cassava were discovered in Benin, Ghana, and Nigeria.”
Claim · model-written summary
Curvularia leaf and stem blight was found in all three countries.
- Taxon
- cassavaManihot esculentat0
- Interactor
- Curvularia lunata
Curvularia lunatae0pathogen - Outcome
- Curvularia leaf and stem blighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Curvularia leaf and stem blight [Curvularia lunata (Wakker) Boedijn) was discovered in all three countries.”
t0“cassava”
Claim · model-written summary
Field incidence of Curvularia infection ranged from 0 to 80%.
- Taxon
- cassavaManihot esculentat0
- Interactor
- Curvularia
Curvulariae0pathogen - Outcome
- incidence of Curvularia-infected plantse0
- Value
- 0 and 80%e0
- Setting
- fielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the field incidence of Curvularia-infected plants ranged between 0 and 80%”
t0“cassava”
Claim · model-written summary
Curvularia lesion severity ranged from 2 to 25 per plant.
- Taxon
- cassavaManihot esculentat0
- Outcome
- severitye0
- Value
- 2 and 25 lesions per plante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“severity between 2 and 25 lesions per plant”
t0“cassava”
Claim · model-written summary
Fully colonized buds did not sprout in any cultivar.
- Taxon
- cassavaManihot esculentat0
- Organ / stage
- budse0
- Outcome
- sprouting was completely inhibitede0
- Qualifier
- completely colonizede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For all cultivars, when buds were completely colonized, sprouting was completely inhibited.”
t0“cassava”
Claim · model-written summary
Partly colonized buds sprouted.
- Taxon
- cassavaManihot esculentat0
- Organ / stage
- budse0
- Outcome
- sproutede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“partially colonized buds sprouted”
t0“cassava”
Claim · model-written summary
Growth from partially colonized buds was 20-50% lower than from healthy stems.
- Taxon
- cassavaManihot esculentat0
- Outcome
- growthe0
- Direction
- reducede0
- Value
- 20-50%e0
- Comparator
- healthy stemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth was reduced by 20-50% (depending on genotype), compared with healthy stems”
t0“cassava”
Claim · model-written summary
Inoculated leaves developed lesions up to 1.5 cm.
- Taxon
- cassavaManihot esculentat0
- Treatment
- artificially inoculatede0
- Interactor
- C. lunataCurvularia lunatae0pathogen
- Outcome
- lesionse0
- Direction
- inducede0
- Value
- 1.5 cme0
- Comparator
- healthy leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On artificially inoculated leaves, C. lunata induced lesions of up to 1.5 cm and 40% leaf abscission, compared with healthy leaves.”
t0“cassava”
Claim · model-written summary
Inoculated leaves had 40% abscission relative to healthy leaves.
- Taxon
- cassavaManihot esculentat0
- Treatment
- artificially inoculatede0
- Interactor
- C. lunataCurvularia lunatae0pathogen
- Outcome
- leaf abscissione0
- Direction
- inducede0
- Value
- 40%e0
- Comparator
- healthy leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On artificially inoculated leaves, C. lunata induced lesions of up to 1.5 cm and 40% leaf abscission, compared with healthy leaves.”
t0“cassava”
Claim · model-written summary
Nattrassia root and stem rot was found in Benin and Nigeria.
- Taxon
- cassavaManihot esculentat0
- Interactor
- Nattrassia mangiferaeNeofusicoccum mangiferaee0pathogen
- Outcome
- root and stem rote0
- Setting
- Benin and Nigeriae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nattrassia mangiferae (Syd. & P. Syd.) B. Sutton & Dyko root and stem rot was discovered in Benin and Nigeria”
t0“cassava”
Claim · model-written summary
Nattrassia field incidence ranged from 0 to 54%.
- Taxon
- cassavaManihot esculentat0
- Outcome
- field incidencee0
- Value
- 0 and 54%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“field incidence ranging between 0 and 54%”
t0“cassava”
Claim · model-written summary
Nattrassia significantly reduced shoots, shoot growth and roots in four cultivars.
- Taxon
- cassavaManihot esculentat0
- Interactor
- N. mangiferaeNeofusicoccum mangiferaee0pathogen
- Outcome
- number of shoots, shoot growth, and number of rootse0
- Direction
- reducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For all four cultivars, N. mangiferae significantly reduced the number of shoots, shoot growth, and number of roots.”
t0“cassava”
Claim · model-written summary
Two cultivars died three weeks after planting.
- Taxon
- cassavaManihot esculentat0
- Outcome
- diede0
- Qualifier
- three weeks after plantinge0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two of the cultivars died three weeks after planting.”
t0“cassava”
The same questions in other papers
inoculation · Curvularia lunata · Manihot esculenta (cassava)Results agree
1 paper in the same direction as this paper
- negative
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.