Abstract
Abstract Late leaf spot, induced by Cercosporidium personatum (Berk. & Curt.) Deighton, causes serious yield losses of peanut (Arachis hypogaea L.) in the southeastern United States. A two-year study was conducted to observe progress of late leaf spot and to evaluate subsequent effects of late leaf spot on accumulation of dry matter, leaf area index (LAI), and pod production of Florunner peanut in fungicide-treated and non-treated plots. Disease severity, which is an expression of both disease-induced defoliation and necrotic leaf area, was used as an indicator of disease progression in the field. The leaf dry weight, LAI, and the dry weight of the total biomass were significantly different at 93 days after planting (DAP) in 1986, and at 78 DAP in 1987 between fungicide-treated and non-treated plots. Late leaf spot reduced the potential yield (harvested and dropped pods) of Florunner peanut by 37% in 1986 and 46% in 1987. In non-treated plots, the abscission of pods was initiated later but progressed faster in 1986 than in 1987. The predictions of pod yield with the measures of healthy leaf area duration (HAD) and healthy area absorption (HAA) were adequate for fungicide-treated plots where pod losses were minimal. However, HAD and HAA were inadequate for predicting pod yield of a peanut crop severely infected by late leaf spot, primarily because this predictive approach does not account for losses of dropped pods.
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Claims 6
Claim · model-written summary
Leaf dry weight, leaf area index, and total biomass differed between fungicide treated and untreated plots at 93 DAP in 1986 and 78 DAP in 1987.
- Taxon
- peanut
Arachis hypogaeat0 - Treatment
- fungicide-treatede0
- Outcome
- leaf dry weight, LAI, and the dry weight of the total biomasse0
- Comparator
- non-treated plotse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leaf dry weight, LAI, and the dry weight of the total biomass were significantly different at 93 days after planting (DAP) in 1986, and at 78 DAP in 1987 between fungicide-treated and non-treated plots”
t0“Peanut”
Claim · model-written summary
Late leaf spot reduced Florunner peanut potential yield by 37% in 1986.
Verbatim
e0“Late leaf spot reduced the potential yield (harvested and dropped pods) of Florunner peanut by 37% in 1986 and 46% in 1987”
e1“Cercosporidium personatum”
Claim · model-written summary
Late leaf spot reduced Florunner peanut potential yield by 46% in 1987.
Verbatim
e0“Late leaf spot reduced the potential yield (harvested and dropped pods) of Florunner peanut by 37% in 1986 and 46% in 1987”
Claim · model-written summary
In untreated plots, pod abscission started later but progressed faster in 1986 than 1987.
- Taxon
- PeanutArachis hypogaeat0
- Outcome
- abscission of podse0
- Direction
- later but progressed fastere0
- Comparator
- 1987e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In non-treated plots, the abscission of pods was initiated later but progressed faster in 1986 than in 1987”
t0“Peanut”
Claim · model-written summary
HAD and HAA adequately predicted pod yield in fungicide treated plots.
- Taxon
- PeanutArachis hypogaeat0
- Outcome
- predictions of pod yielde0
- Qualifier
- adequatee0
- Comparator
- fungicide-treated plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The predictions of pod yield with the measures of healthy leaf area duration (HAD) and healthy area absorption (HAA) were adequate for fungicide-treated plots where pod losses were minimal”
t0“Peanut”
Claim · model-written summary
HAD and HAA were inadequate for predicting yield in severely infected peanut crops because dropped-pod losses were omitted.
- Taxon
- peanutArachis hypogaeae0
- Outcome
- predicting pod yielde0
- Qualifier
- does not account for losses of dropped podse0
- Comparator
- a peanut crop severely infected by late leaf spote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“HAD and HAA were inadequate for predicting pod yield of a peanut crop severely infected by late leaf spot, primarily because this predictive approach does not account for losses of dropped pods”
The same questions in other papers
fungicide · growth · Arachis hypogaea (peanut)Results agree
8 papers in the same direction as this paper
- positive
- positive
- positive
5 papers more in this group
See all 9 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.