Abstract
SUMMARY The germination of spores of blister blight of tea ( Exobasidium vexans Massee) requires moisture, but 0.1 in. of rain in a day provides sufficient for a high percentage of germination to occur; more rain does not materially increase germination. Spores are killed by sunshine of a few hours' duration, even if there is adequate rain on the same day. An average of about 3 3/4 hr. of sunshine per day over 5 days is enough to reduce the blister‐blight disease to subeconomic levels. Ten‐day spraying rounds with copper fungicide usually give adequate control of the disease but add to the cost of production. A method is put forward of using recorded sunshine hours as the criterion in deciding on the frequency of spraying; spraying is postponed, by successive 5‐day periods, until the average sunshine for the previous 5 days has dropped below 3 3/4 hr. A reduction approaching one‐half of the number of spray applications can be made in this way.
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Claims 8
Claim · model-written summary
Blister blight spores require moisture to germinate.
- Taxon
- teae0
- Treatment
- moisturee0
- Interactor
- Exobasidium vexans Massee
Exobasidium vexanse0pathogen - Outcome
- germination of spores of blister blight of teae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“germination of spores of blister blight of tea ( Exobasidium vexans Massee) requires moisture”
Claim · model-written summary
Daily rainfall of 0.1 in. supports high spore germination.
- Taxon
- teat0
- Treatment
- 0.1 in. of rain in a daye1
- Interactor
- blister blighte0pathogen
- Outcome
- high percentage of germinatione1
Not reportedDirection
Verbatim
t0“tea”
e1“0.1 in. of rain in a day provides sufficient for a high percentage of germination to occur; more rain does not materially increase germination”
e0“germination of spores of blister blight of tea ( Exobasidium vexans Massee) requires moisture”
Claim · model-written summary
Further rain does not materially increase spore germination.
Verbatim
t0“tea”
e1“0.1 in. of rain in a day provides sufficient for a high percentage of germination to occur; more rain does not materially increase germination”
Claim · model-written summary
Several hours of sunshine kill spores despite rain.
- Taxon
- teat0
- Treatment
- sunshine of a few hours' duratione2
- Outcome
- Spores are killede2
- Qualifier
- even if there is adequate rain on the same daye2
Not reportedDirection
Verbatim
t0“tea”
e2“Spores are killed by sunshine of a few hours' duration, even if there is adequate rain on the same day”
Claim · model-written summary
About 3 3/4 hours daily sunshine over five days reduces tea blister blight below economic levels.
Verbatim
t0“tea”
e3“An average of about 3 3/4 hr. of sunshine per day over 5 days is enough to reduce the blister‐blight disease to subeconomic levels”
Claim · model-written summary
Ten-day copper spraying usually controls the disease.
Not reportedComparatorDirection
Verbatim
t0“tea”
e4“Ten‐day spraying rounds with copper fungicide usually give adequate control of the disease but add to the cost of production”
Claim · model-written summary
Ten-day copper spraying adds production costs.
- Taxon
- teat0
- Treatment
- Ten‐day spraying rounds with copper fungicidee4
- Outcome
- cost of productione4
- Direction
- adde4
Not reportedComparator
Verbatim
t0“tea”
e4“Ten‐day spraying rounds with copper fungicide usually give adequate control of the disease but add to the cost of production”
Claim · model-written summary
Sunshine-based spray timing can nearly halve applications.
- Taxon
- teat0
- Treatment
- spraying is postponede6
- Outcome
- number of spray applicationse5
- Direction
- reductione5
- Value
- one‐halfe5
Not reportedComparator
Verbatim
t0“tea”
e5“A reduction approaching one‐half of the number of spray applications can be made in this way”
e6“spraying is postponed, by successive 5‐day periods, until the average sunshine for the previous 5 days has dropped below 3 3/4 hr.”
The same questions in other papers
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- positive
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2 in the opposite direction
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8 in the opposite direction
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5 papers more in this group
See all 9 papers →fungicide · control · Camellia sinensis (black tea)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.