Abstract
Apple leaves of different ages were inoculated with ascospores and conidia of Venluria inaequalis (eke) Wint., leaf age being taken from the day the leaf was fully unfolded and flat. When ascospores were used, the greatest number of lesions occurred on leaves inoculated 3 to 5 days after unfolding. However, on a leaf area basis, leaves 2 days after unfolding were the most susceptible. When conidia were used, the greatest number of lesions occurred on leaves inoculated I to 3 days after unfolding, while on a leaf area basis leaves not fully unfolded were even more susceptible. The leaves of trees receiving a balanced nutrient solution were almost completely resistant after 12 to 13 days, i.e. at about the time leaf expansion ceased. Rate of leaf emergence was found to be influenced by temperature, but other factors were also involved. This, together with the fact that leaves of different ages differ in their susceptibility to scab, explains the great variation in scab development observed during previous infection studies.
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Claims 7
Claim · model-written summary
Ascospore inoculation yielded the greatest lesion count on leaves inoculated 3 to 5 days after unfolding.
- Taxon
- apple
Malus domesticat0 - Organ / stage
- leaves inoculated 3 to 5 days after unfoldinge0
- Interactor
- Venluria inaequalis (eke) Wint.e1pathogen
- Outcome
- number of lesionse0
- Direction
- greateste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When ascospores were used, the greatest number of lesions occurred on leaves inoculated 3 to 5 days after unfolding.”
t0“apple leaves”
e1“Venluria inaequalis (eke) Wint.”
Claim · model-written summary
On a leaf area basis, 2-day-old leaves were most susceptible to ascospores.
- Taxon
- appleMalus domesticat0
- Organ / stage
- leaves 2 days after unfoldinge0
- Interactor
- Venluria inaequalis (eke) Wint.e1pathogen
- Outcome
- most susceptiblee0
- Direction
- most susceptiblee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on a leaf area basis, leaves 2 days after unfolding were the most susceptible.”
t0“apple leaves”
e1“Venluria inaequalis (eke) Wint.”
Claim · model-written summary
Conidial inoculation yielded the greatest lesion count on leaves inoculated I to 3 days after unfolding.
- Taxon
- appleMalus domesticat0
- Organ / stage
- leaves inoculated I to 3 days after unfoldinge0
- Interactor
- Venluria inaequalis (eke) Wint.e1pathogen
- Outcome
- number of lesionse0
- Direction
- greateste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When conidia were used, the greatest number of lesions occurred on leaves inoculated I to 3 days after unfolding”
t0“apple leaves”
e1“Venluria inaequalis (eke) Wint.”
Claim · model-written summary
On a leaf area basis, leaves not fully unfolded were even more susceptible to conidia.
- Taxon
- appleMalus domesticat0
- Organ / stage
- leaves not fully unfoldede0
- Interactor
- Venluria inaequalis (eke) Wint.e1pathogen
- Outcome
- more susceptiblee0
- Direction
- more susceptiblee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on a leaf area basis leaves not fully unfolded were even more susceptible.”
t0“apple leaves”
e1“Venluria inaequalis (eke) Wint.”
Claim · model-written summary
Trees given balanced nutrient solution had leaves almost completely resistant after 12 to 13 days.
- Taxon
- appleMalus domesticat0
- Organ / stage
- leavese0
- Treatment
- balanced nutrient solutione0
- Interactor
- Venluria inaequalis (eke) Wint.e1pathogen
- Outcome
- almost completely resistante0
- Qualifier
- after 12 to 13 dayse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leaves of trees receiving a balanced nutrient solution were almost completely resistant after 12 to 13 days, i.e. at about the time leaf expansion ceased.”
t0“apple leaves”
e1“Venluria inaequalis (eke) Wint.”
Claim · model-written summary
Temperature influenced the rate of leaf emergence, with other factors also involved.
- Taxon
- appleMalus domesticat0
- Treatment
- temperaturee0
- Outcome
- Rate of leaf emergencee0
- Qualifier
- other factors were also involvede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rate of leaf emergence was found to be influenced by temperature, but other factors were also involved.”
t0“apple leaves”
Claim · model-written summary
Variation in leaf emergence and age-dependent scab susceptibility explained variation in scab development during earlier infection studies.
- Taxon
- appleMalus domesticat0
- Organ / stage
- leaves of different agese0
- Interactor
- Venluria inaequalis (eke) Wint.e1pathogen
- Outcome
- great variation in scab developmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This, together with the fact that leaves of different ages differ in their susceptibility to scab, explains the great variation in scab development observed during previous infection studies.”
t0“apple leaves”
e1“Venluria inaequalis (eke) Wint.”