Abstract
Several measures have been recommended in the control of potato cyst nematodes (PCN) with resistant potato cultivars being considered as the most practical and affordable for smallholder potato farmers in Kenya. However, the level of resistance in locally grown potato varieties is yet to be established. The aim of this study was to screen Kenyan potato cultivars against PCN under greenhouse conditions. Eleven potato cultivars namely Shangi, Dutch Robijn, Sherekea, Nyota, Roseline tana, Tigoni, Unica, Asante, Chulu, Kenya Mpya and Arka were screened with Desiree (susceptible variety), Manitou (resistant cultivar) as controls. For each potato cultivar, there were two sets of plants with the first set being inoculated with 50 cysts, while the second batch was nematode-free. The treatments were arranged in a completely randomized design with three replications. A scale of 1-9, with 9 indicating the highest level of resistance was used in the assessment of disease severity. Nematode infestation caused a reduction in root mass across the 11 cultivars from 20 to 100% compared to uninoculated controls. Reproductive index of PCN viable eggs across the 11 cultivars was <1 compared to control (Desiree). Potato cultivars Shangi, Tigoni, Dutch, Chulu, Asante, Unica, Arka, Kenya Mpya, and Roseline Tana had a severity score of 1-3 (>95%), hence were considered to be susceptible to PCN. The cultivars Sherekea and Nyota had a severity score of 4-6 (<25%) and hence were considered partially resistant to PCN. The findings of this study provides a basis of integrating partially resistant potato cultivars into PCN management in smallholder farms. Keywords: Cyst viable eggs, reproductive index, resistance, susceptible, smallholder farmers, severity score.
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Claims 6
Claim · model-written summary
Nematode infestation reduced root mass by 20 to 100% across eleven cultivars relative to uninoculated controls.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- Nematode infestatione0
- Outcome
- root masse0
- Direction
- reductione0
- Value
- 20 to 100%e0
- Comparator
- uninoculated controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nematode infestation caused a reduction in root mass across the 11 cultivars from 20 to 100% compared to uninoculated controls.”
t0“potato cultivars”
Claim · model-written summary
PCN viable egg reproductive index was below one across eleven cultivars compared with Desiree.
- Taxon
- potatoSolanum tuberosumt0
- Interactor
- PCNe1pest
- Outcome
- Reproductive index of PCN viable eggse1
- Value
- <1e1
- Comparator
- Desireee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Reproductive index of PCN viable eggs across the 11 cultivars was <1 compared to control (Desiree).”
t0“potato cultivars”
Claim · model-written summary
Nine listed potato cultivars were classified as susceptible, with severity scores of 1–3.
- Taxon
- PotatoSolanum tuberosume2
- Material
- Shangi, Tigoni, Dutch, Chulu, Asante, Unica, Arka, Kenya Mpya, and Roseline Tanae2
- Interactor
- PCNe2pest
- Outcome
- susceptible to PCNe2
- Value
- 1-3e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Potato cultivars Shangi, Tigoni, Dutch, Chulu, Asante, Unica, Arka, Kenya Mpya, and Roseline Tana had a severity score of 1-3 (>95%), hence were considered to be susceptible to PCN.”
Claim · model-written summary
Sherekea was partially resistant to PCN with a severity score of 4–6.
- Taxon
- potatoSolanum tuberosumt0
- Material
- Sherekeae3
- Interactor
- PCNe3pest
- Outcome
- partially resistant to PCNe3
- Value
- 4-6e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The cultivars Sherekea and Nyota had a severity score of 4-6 (<25%) and hence were considered partially resistant to PCN.”
t0“potato cultivars”
Claim · model-written summary
Nyota was partially resistant to PCN with a severity score of 4–6.
- Taxon
- potatoSolanum tuberosumt0
- Material
- Nyotae3
- Interactor
- PCNe3pest
- Outcome
- partially resistant to PCNe3
- Value
- 4-6e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The cultivars Sherekea and Nyota had a severity score of 4-6 (<25%) and hence were considered partially resistant to PCN.”
t0“potato cultivars”
Claim · model-written summary
The authors propose integrating partially resistant cultivars into smallholder PCN management.
- Taxon
- potatoSolanum tuberosume4
- Interactor
- PCNe4pest
- Outcome
- integrating partially resistant potato cultivars into PCN management in smallholder farmse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“integrating partially resistant potato cultivars into PCN management in smallholder farms”
The same questions in other papers
infection · Nematoda · Solanum tuberosum (potato)Results agree
5 papers in the same direction as this paper
- negative
- negative
- no effect
2 papers more in this group
See all 6 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.