Abstract
SUMMARY Two complementary field experiments at Rothamsted in 1965, with the potato variety Majestic, related the incidence of common scab ( Streptomyces scabies ) to rainfall, soil moisture and time of tuber formation. In plots where the soil was maintained at field capacity (less than 10 cm. Hg moisture tension) by watering, tubers had little or no scab; infection increased in amount on plots allowed to dry to 30 cm., 50 cm. or more Hg moisture tension during late June. The time tubers formed was varied by planting sprouted (chitted) and non‐sprouted seed tubers, and tuber development and scab incidence were observed on sample plants lifted at frequent intervals from unwatered plots. Scab lesions were first seen on 12 July when the distribution of lesions on the surface of tubers was affected by size of tuber both within and between the different seed‐tuber treatments. These differences were correlated with estimates of tuber size on 28 June, the beginning of the first dry period. Tubers 1.0 cm. or more in diameter on 28 June had few or no lesions at the stolon attachment (heel) end of tubers on 12 July, whereas tubers smaller than this on 28 June had many lesions in this region on 12 July. The larger the tuber was on 28 June, the greater was the area free from scab lesions on 12 July.
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Claims 6
Claim · model-written summary
Watering to field capacity left tubers with little or no scab.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- maintained at field capacity (less than 10 cm. Hg moisture tension) by wateringe0
- Interactor
- Streptomyces scabiesStreptomyces scabieit0pathogen
- Outcome
- scabe0
- Direction
- little or noe0
- Comparator
- plots allowed to dry to 30 cm., 50 cm. or more Hg moisture tensione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In plots where the soil was maintained at field capacity (less than 10 cm. Hg moisture tension) by watering, tubers had little or no scab; infection increased in amount on plots allowed to dry to 30 cm., 50 cm. or more Hg moisture tension during late June.”
t0“The effects of soil moisture at the time potato tubers are forming on the incidence of common scab (Streptomyces scabies)”
Claim · model-written summary
Infection increased in plots dried during late June.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- plots allowed to dry to 30 cm., 50 cm. or more Hg moisture tensione0
- Interactor
- Streptomyces scabiesStreptomyces scabieit0pathogen
- Outcome
- infectione0
- Direction
- increasede0
- Qualifier
- during late Junee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“infection increased in amount on plots allowed to dry to 30 cm., 50 cm. or more Hg moisture tension during late June.”
t0“The effects of soil moisture at the time potato tubers are forming on the incidence of common scab (Streptomyces scabies)”
Claim · model-written summary
Scab lesions first appeared on 12 July.
- Taxon
- potatoSolanum tuberosumt0
- Interactor
- Streptomyces scabiesStreptomyces scabieit0pathogen
- Outcome
- Scab lesions were first seene0
- Value
- 12 Julye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Scab lesions were first seen on 12 July”
t0“The effects of soil moisture at the time potato tubers are forming on the incidence of common scab (Streptomyces scabies)”
Claim · model-written summary
Heel-end lesions were few or absent in tubers at least 1.0 cm in diameter on 28 June.
- Taxon
- potatoSolanum tuberosumt0
- Material
- Tuberse0
- Interactor
- Streptomyces scabiesStreptomyces scabieit0pathogen
- Outcome
- lesions at the stolon attachment (heel) ende0
- Direction
- few or noe0
- Value
- 1.0 cm.e0
- Qualifier
- on 28 Junee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tubers 1.0 cm. or more in diameter on 28 June had few or no lesions at the stolon attachment (heel) end of tubers on 12 July, whereas tubers smaller than this on 28 June had many lesions in this region on 12 July.”
t0“The effects of soil moisture at the time potato tubers are forming on the incidence of common scab (Streptomyces scabies)”
Claim · model-written summary
Smaller tubers on 28 June had many heel-end lesions on 12 July.
- Taxon
- potatoSolanum tuberosumt0
- Organ / stage
- tuberse0
- Interactor
- Streptomyces scabiesStreptomyces scabieit0pathogen
- Outcome
- lesions in this regione0
- Direction
- manye0
- Qualifier
- smaller than this on 28 Junee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whereas tubers smaller than this on 28 June had many lesions in this region on 12 July.”
t0“The effects of soil moisture at the time potato tubers are forming on the incidence of common scab (Streptomyces scabies)”
Claim · model-written summary
Larger tubers on 28 June had more lesion-free area on 12 July.
- Taxon
- potatoSolanum tuberosumt0
- Organ / stage
- tubere0
- Interactor
- Streptomyces scabiesStreptomyces scabieit0pathogen
- Outcome
- area free from scab lesionse0
- Direction
- greatere0
- Qualifier
- on 28 Junee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The larger the tuber was on 28 June, the greater was the area free from scab lesions on 12 July.”
t0“The effects of soil moisture at the time potato tubers are forming on the incidence of common scab (Streptomyces scabies)”
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- positive
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- positive
- positive
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3 papers more in this group
See all 7 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.