Abstract
Cassava mosaic disease (CMD) is reported as the most important constraint on cassava in Sub-Saharan Africa. The understanding of the disease epidemiology, the genetic diversity of the virus and its vector is a key factor for the disease management. In this study, cropping system associating cassava, common beans (Phaseolus vulgaris) and maize, the most frequent cassava cropping system in Eastern DR Congo, was investigated to understand the disease characteristics and existing interactions within this pathosystem: cassava mosaic begomoviruses (CMBs), cassava and non-cassava plants, Bemisia tabaci population and agro-ecosystems in which they are found. Different geographic locations mainly depending on the altitude levels showed a significant influence on CMD incidence and severity, and whitefly population. CMD and its vector pressure were high in low altitude, but significant decrease was observed in intercropped fields. Under high epidemic pressure, respective decreases of 19% and of 33.3% were recorded on disease incidence and whitefly population. Only two CMBs (ACMV and EACMV-UG) were detected both in cassava plants and in whiteflies collected on cassava and other plant species. In contrast, no CMBs were detected in non-cassava associated plants. Bemisia tabaci characterization based on MtCOI sequences analysis revealed the presence of a single haplotype close to Ug1, irrespective of the plant species on which the insects were collected. The low diversity of the CMBs and whitefly population combined with the impact of local intercropping system cassava, common beans and maize are discussed, underlining the interest of the other ways of CMD management besides crop resistance strategies.
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 9
Claim · model-written summary
Geographic location and altitude influenced disease incidence and severity.
- Taxon
- cassava
Manihot esculentat1 - Outcome
- CMD incidence and severitye0
- Setting
- Different geographic locationse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Different geographic locations mainly depending on the altitude levels showed a significant influence on CMD incidence and severity, and whitefly population.”
t1“cassava-maize-common beans inter-cropping system”
Claim · model-written summary
Geographic location and altitude influenced whitefly population.
- Taxon
- cassavaManihot esculentat1
- Interactor
- whiteflye0pest
- Outcome
- whitefly populatione0
- Setting
- Different geographic locationse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Different geographic locations mainly depending on the altitude levels showed a significant influence on CMD incidence and severity, and whitefly population.”
t1“cassava-maize-common beans inter-cropping system”
Claim · model-written summary
CMD pressure was high at low altitude.
- Taxon
- cassavaManihot esculentat1
- Outcome
- CMDe0
- Direction
- highe0
- Setting
- low altitudee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CMD and its vector pressure were high in low altitude”
t1“cassava-maize-common beans inter-cropping system”
Claim · model-written summary
Vector pressure was high at low altitude.
- Taxon
- cassavaManihot esculentat1
- Outcome
- vector pressuree0
- Direction
- highe0
- Setting
- low altitudee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CMD and its vector pressure were high in low altitude”
t1“cassava-maize-common beans inter-cropping system”
Claim · model-written summary
Intercropping reduced CMD incidence by 19% under high epidemic pressure.
- Taxon
- cassavaManihot esculentat1
- Treatment
- inter-cropping systemt1
- Outcome
- disease incidencee0
- Direction
- decreasese0
- Value
- 19%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under high epidemic pressure, respective decreases of 19% and of 33.3% were recorded on disease incidence and whitefly population.”
t1“cassava-maize-common beans inter-cropping system”
Claim · model-written summary
Intercropping reduced whitefly population by 33.3% under high epidemic pressure.
- Taxon
- cassavaManihot esculentat1
- Treatment
- inter-cropping systemt1
- Interactor
- whiteflye0pest
- Outcome
- whitefly populatione0
- Direction
- decreasese0
- Value
- 33.3%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under high epidemic pressure, respective decreases of 19% and of 33.3% were recorded on disease incidence and whitefly population.”
t1“cassava-maize-common beans inter-cropping system”
Claim · model-written summary
ACMV and EACMV-UG were detected in cassava and whiteflies.
- Taxon
- cassavaManihot esculentae0
- Interactor
- whitefliesAleyrodoideae0pest
- Outcome
- ACMV and EACMV-UG) were detectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Only two CMBs (ACMV and EACMV-UG) were detected both in cassava plants and in whiteflies collected on cassava and other plant species.”
Claim · model-written summary
CMBs were absent from associated non-cassava plants.
Verbatim
e0“no CMBs were detected in non-cassava associated plants”
Claim · model-written summary
A single B. tabaci haplotype close to Ug1 occurred regardless of collection plant.
- Taxon
- Bemisia tabaci
Bemisia tabacie0 - Outcome
- single haplotype close to Ug1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bemisia tabaci characterization based on MtCOI sequences analysis revealed the presence of a single haplotype close to Ug1, irrespective of the plant species on which the insects were collected.”
The same questions in other papers
intercropping · pest · Manihot esculenta (cassava)Positive and negative results
3 papers in the same direction as this paper · 1 reporting no difference from an alternative
- no effect
- positive
- positive
1 paper more in this group
See all 5 papers →intercropping · disease · Manihot esculenta (cassava)Positive and negative results
4 papers in the same direction as this paper · 5 in the opposite direction
- no effect
- no effect
- negative
6 papers more in this group
See all 10 papers →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.