Abstract
ABSTRACT Sweet pepper-Leveillula taurica microclimate relations were studied under controlled conditions and in commercial greenhouses. Conidial germination occurred at 10 to 37 degrees C and was optimal at 20 degrees C. Conidial viability declined as temperatures increased to 40 degrees C for 6 h. Leaf colonization was optimal at 15 to 25 degrees C. Severe leaf infections occurred at 15 to 20 degrees C and conidiation was suppressed at 20 to 25 degrees C. Highest germination rates were observed at 75 to 85% relative humidity (RH). Severity of leaf coverage by symptoms was high for plants which were subjected to longer periods of temperatures between 10 to 15 degrees C and daytime RH between 85 to 95%, and positively correlated with nighttime RH. Disease severity was negatively correlated with lengthy periods of temperatures >25 degrees C, day and night average temperatures, and average daytime RH. Conversely, leaf shedding was relatively high under conditions characterized by long periods of temperatures >20 degrees C and <13 degrees C, and positively correlated with average daytime temperatures and periods of RH <75%. Increasing nighttime temperatures by heating and daytime temperatures by closing the greenhouse side walls reduced disease in two commercial greenhouse experiments. A midseason shift from a cooler greenhouse climate to warm daytime climate halted epidemic development. Flower number and yield were reduced in infected crops.
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Claims 10
Claim · model-written summary
Conidia germinated from 10 to 37 degrees C with an optimum at 20 degrees C.
- Taxon
- Sweet pepper
Capsicum annuumt0 - Interactor
- Leveillula tauricat0pathogen
- Outcome
- Conidial germinatione0
- Value
- 20 degrees Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Conidial germination occurred at 10 to 37 degrees C and was optimal at 20 degrees C”
t0“Effect of Microclimate on Leveillula taurica Powdery Mildew of Sweet Pepper”
Claim · model-written summary
Conidial viability declined as temperature rose to 40 degrees C.
- Taxon
- Sweet pepperCapsicum annuumt0
- Interactor
- Leveillula tauricat0pathogen
- Outcome
- Conidial viabilitye0
- Direction
- declinede0
- Setting
- 40 degrees Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Conidial viability declined as temperatures increased to 40 degrees C for 6 h”
t0“Effect of Microclimate on Leveillula taurica Powdery Mildew of Sweet Pepper”
Claim · model-written summary
Leaf colonization was optimal at 15 to 25 degrees C.
- Taxon
- Sweet pepperCapsicum annuumt0
- Outcome
- Leaf colonizatione0
- Direction
- optimale0
- Value
- 15 to 25 degrees Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf colonization was optimal at 15 to 25 degrees C”
t0“Effect of Microclimate on Leveillula taurica Powdery Mildew of Sweet Pepper”
Claim · model-written summary
Severe leaf infections occurred at 15 to 20 degrees C.
- Taxon
- Sweet pepperCapsicum annuumt0
- Outcome
- Severe leaf infectionse0
- Value
- 15 to 20 degrees Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Severe leaf infections occurred at 15 to 20 degrees C”
t0“Effect of Microclimate on Leveillula taurica Powdery Mildew of Sweet Pepper”
Claim · model-written summary
Conidiation was suppressed at 20 to 25 degrees C.
- Taxon
- Sweet pepperCapsicum annuumt0
- Outcome
- conidiatione0
- Direction
- suppressede0
- Value
- 20 to 25 degrees Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“conidiation was suppressed at 20 to 25 degrees C”
t0“Effect of Microclimate on Leveillula taurica Powdery Mildew of Sweet Pepper”
Claim · model-written summary
Germination rates were highest at 75 to 85% humidity.
- Taxon
- Sweet pepperCapsicum annuumt0
- Outcome
- germination ratese0
- Direction
- Higheste0
- Value
- 75 to 85% relative humiditye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Highest germination rates were observed at 75 to 85% relative humidity (RH)”
t0“Effect of Microclimate on Leveillula taurica Powdery Mildew of Sweet Pepper”
Claim · model-written summary
Disease severity was negatively correlated with periods above 25 degrees C and average temperatures and daytime humidity.
- Taxon
- Sweet pepperCapsicum annuumt0
- Outcome
- Disease severitye0
- Direction
- negativelye0
- Setting
- temperatures >25 degrees Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Disease severity was negatively correlated with lengthy periods of temperatures >25 degrees C, day and night average temperatures, and average daytime RH”
t0“Effect of Microclimate on Leveillula taurica Powdery Mildew of Sweet Pepper”
Claim · model-written summary
Heating nights and closing greenhouse walls by day reduced disease.
- Taxon
- Sweet pepperCapsicum annuumt0
- Treatment
- Increasing nighttime temperatures by heating and daytime temperatures by closing the greenhouse side wallse0
- Outcome
- diseasee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing nighttime temperatures by heating and daytime temperatures by closing the greenhouse side walls reduced disease in two commercial greenhouse experiments”
t0“Effect of Microclimate on Leveillula taurica Powdery Mildew of Sweet Pepper”
Claim · model-written summary
Switching from a cooler greenhouse climate to warm daytime conditions halted epidemic development.
- Taxon
- Sweet pepperCapsicum annuumt0
- Treatment
- warm daytime climatee0
- Outcome
- epidemic developmente0
- Direction
- haltede0
- Comparator
- cooler greenhouse climatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A midseason shift from a cooler greenhouse climate to warm daytime climate halted epidemic development”
t0“Effect of Microclimate on Leveillula taurica Powdery Mildew of Sweet Pepper”
Claim · model-written summary
Infection reduced flower number and yield.
- Taxon
- Sweet pepperCapsicum annuumt0
- Treatment
- infectede0
- Outcome
- Flower number and yielde0
- Direction
- reducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Flower number and yield were reduced in infected crops”
t0“Effect of Microclimate on Leveillula taurica Powdery Mildew of Sweet Pepper”
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See all 8 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.