Abstract
We sought to establish the most effective combination of planting dates with insecticide spraying regimes for the management of insect pests of cowpea in the savannas of northeast Nigeria. The results after 3 sprays, made once each at the bud initiation, flowering, and podding stages, did not differ significantly from those after 2 sprays, made once each at flowering and podding, in terms of reducing insect pest population and increasing grain yield. Despite the reduction in insect infestation, delaying planting beyond mid-August reduced cowpea grain yield by 12.3%, on average. The yield of the medium-maturing variety IT89KD-391 was significantly higher when planted in mid-August and sprayed twice than when planted on the earlier or later dates. The yield of the indeterminate late-maturing variety ITKD89-288 was higher when planted in early August and sprayed thrice. Early- and medium-maturing cowpea varieties should therefore be planted in mid-August and sprayed twice. Late-maturing indeterminate varieties should be planted in early August and sprayed thrice.
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Claims 7
Claim · model-written summary
Three sprays and two sprays did not differ significantly in reducing insect pest populations.
- Taxon
- cowpea
Vigna unguiculatat0 - Treatment
- 3 sprayse0
- Interactor
- insect peste0pest
- Outcome
- insect pest populatione0
- Direction
- did not differ significantlye0
- Comparator
- 2 sprayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results after 3 sprays, made once each at the bud initiation, flowering, and podding stages, did not differ significantly from those after 2 sprays, made once each at flowering and podding, in terms of reducing insect pest population and increasing grain yield.”
t0“cowpea”
Claim · model-written summary
Three sprays and two sprays did not differ significantly in increasing cowpea grain yield.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- 3 sprayse0
- Outcome
- grain yielde0
- Direction
- did not differ significantlye0
- Comparator
- 2 sprayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results after 3 sprays, made once each at the bud initiation, flowering, and podding stages, did not differ significantly from those after 2 sprays, made once each at flowering and podding, in terms of reducing insect pest population and increasing grain yield.”
t0“cowpea”
Claim · model-written summary
Planting after mid-August reduced cowpea grain yield by 12.3% on average.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- delaying planting beyond mid-Auguste0
- Outcome
- grain yielde0
- Direction
- reducede0
- Value
- 12.3%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“delaying planting beyond mid-August reduced cowpea grain yield by 12.3%, on average.”
Claim · model-written summary
IT89KD-391 yielded significantly more when planted in mid-August and sprayed twice than on earlier or later dates.
- Taxon
- cowpeaVigna unguiculatat0
- Material
- IT89KD-391e0
- Treatment
- planted in mid-August and sprayed twicee0
- Outcome
- yielde0
- Direction
- highere0
- Comparator
- earlier or later datese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield of the medium-maturing variety IT89KD-391 was significantly higher when planted in mid-August and sprayed twice than when planted on the earlier or later dates.”
t0“cowpea”
Claim · model-written summary
ITKD89-288 yielded more when planted in early August and sprayed three times.
- Taxon
- cowpeaVigna unguiculatat0
- Material
- ITKD89-288e0
- Treatment
- planted in early August and sprayed thricee0
- Outcome
- yielde0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield of the indeterminate late-maturing variety ITKD89-288 was higher when planted in early August and sprayed thrice.”
t0“cowpea”
Claim · model-written summary
Early and medium maturing cowpea varieties should be planted in mid-August and sprayed twice.
- Taxon
- cowpeaVigna unguiculatae0
- Outcome
- planted in mid-August and sprayed twicee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Early- and medium-maturing cowpea varieties should therefore be planted in mid-August and sprayed twice.”
Claim · model-written summary
Late maturing indeterminate cowpea varieties should be planted in early August and sprayed three times.
- Taxon
- cowpeaVigna unguiculatat0
- Outcome
- planted in early August and sprayed thricee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Late-maturing indeterminate varieties should be planted in early August and sprayed thrice.”
t0“cowpea”
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