Abstract
Abstract Cowpea ( Vigna unguiculata (L.) Walp.) is a crop of major importance in semiarid regions, where powdery mildew can significantly reduce productivity. This study evaluated powdery mildew severity in four cowpea cultivars grown under monocropping and intercropping with two biomass sorghum ( Sorghum bicolor (L.) Moench) across two planting seasons (June and December 2021) under semiarid conditions. The experiment was conducted in a randomized complete block design arranged in a 12 × 2 factorial scheme with three replications, and disease severity was assessed at the R9 stage by means of the percentage of leaf area affected. Planting season significantly affected disease severity, and a significant season × treatment interaction was detected, indicating that the effects of cultivar and cropping system depended on planting season. Disease severity was higher in the June planting, whereas December planting reduced severity by 69.60%. Intercropping reduced disease severity for most cultivars during the June planting. Monocropping systems showed higher grain yield due to greater plant density, averaging 2.11 and 2.29 t ha − 1 in June and December planting, respectively, while intercropping averaged 1.15 and 1.22 t ha − 1 . However, intercropped cowpea maintained stable productivity per plant despite a 50% reduction in plant density. These results demonstrate that adjusting planting date and adopting intercropping with adapted cultivars can simultaneously reduce powdery mildew severity and maintain productive stability in semiarid cowpea systems.
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Claims 7
Claim · model-written summary
Planting season significantly affected powdery mildew severity in cowpea.
- Taxon
- Cowpea
Vigna unguiculatae0 - Treatment
- Planting seasone1
- Interactor
- powdery mildewe0pathogen
- Outcome
- disease severitye1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cowpea ( Vigna unguiculata (L.) Walp.) is a crop of major importance in semiarid regions, where powdery mildew can significantly reduce productivity”
e1“Planting season significantly affected disease severity”
Claim · model-written summary
The effect of cropping system on cowpea powdery mildew severity depended on planting season.
- Taxon
- CowpeaVigna unguiculatae0
- Treatment
- cropping systeme2
- Interactor
- powdery mildewe0pathogen
- Outcome
- disease severitye1
- Qualifier
- depended on planting seasone2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cowpea ( Vigna unguiculata (L.) Walp.) is a crop of major importance in semiarid regions, where powdery mildew can significantly reduce productivity”
e1“Planting season significantly affected disease severity”
e2“the effects of cultivar and cropping system depended on planting season”
Claim · model-written summary
In cowpea, December planting reduced powdery mildew severity by 69.60% compared with June planting.
- Taxon
- CowpeaVigna unguiculatae0
- Treatment
- December plantinge3
- Interactor
- powdery mildewe0pathogen
- Outcome
- disease severitye3
- Direction
- reducede3
- Value
- 69.60%e3
- Comparator
- June plantinge3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cowpea ( Vigna unguiculata (L.) Walp.) is a crop of major importance in semiarid regions, where powdery mildew can significantly reduce productivity”
e3“Disease severity was higher in the June planting, whereas December planting reduced severity by 69.60%”
Claim · model-written summary
Intercropping reduced powdery mildew severity in most cowpea cultivars during the June planting compared with monocropping.
- Taxon
- CowpeaVigna unguiculatae0
- Treatment
- Intercroppinge4
- Interactor
- powdery mildewe0pathogen
- Outcome
- disease severitye4
- Direction
- reducede4
- Qualifier
- for most cultivars during the June plantinge4
- Comparator
- monocroppinge5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cowpea ( Vigna unguiculata (L.) Walp.) is a crop of major importance in semiarid regions, where powdery mildew can significantly reduce productivity”
e4“Intercropping reduced disease severity for most cultivars during the June planting”
e5“grown under monocropping and intercropping”
Claim · model-written summary
Monocropping gave higher cowpea grain yield than intercropping, with 2.11 and 2.29 t ha − 1 in June and December planting.
- Taxon
- CowpeaVigna unguiculatae0
- Treatment
- Monocroppinge6
- Outcome
- grain yielde6
- Direction
- highere6
- Value
- 2.11 and 2.29 t ha − 1e6
- Qualifier
- intercropping averaged 1.15 and 1.22 t ha − 1e6
- Comparator
- intercroppinge6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cowpea ( Vigna unguiculata (L.) Walp.) is a crop of major importance in semiarid regions, where powdery mildew can significantly reduce productivity”
e6“Monocropping systems showed higher grain yield due to greater plant density, averaging 2.11 and 2.29 t ha − 1 in June and December planting, respectively, while intercropping averaged 1.15 and 1.22 t ha − 1”
Claim · model-written summary
Intercropped cowpea maintained stable productivity per plant despite a 50% reduction in plant density.
- Taxon
- cowpeaVigna unguiculatae7
- Treatment
- intercroppede7
- Outcome
- productivity per plante7
- Direction
- no_changeinferrede7
- Qualifier
- 50% reduction in plant densitye7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“intercropped cowpea maintained stable productivity per plant despite a 50% reduction in plant density”
Claim · model-written summary
Adjusting planting date and adopting intercropping with adapted cultivars can reduce powdery mildew severity and maintain productive stability in semiarid cowpea.
- Taxon
- cowpeaVigna unguiculatae7
- Treatment
- adjusting planting date and adopting intercropping with adapted cultivarse7
- Outcome
- powdery mildew severitye7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“These results demonstrate that adjusting planting date and adopting intercropping with adapted cultivars can simultaneously reduce powdery mildew severity and maintain productive stability in semiarid cowpea systems”
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