Abstract
Abstract: A field experiment was carried out to investigate the effects of variety and spatial arrangement on pest incidence, damage and subsequent yield of cowpea in a cowpea/maize intercrop. Two varieties of cowpea (Tvu 13076 and Ife brown) and two spatial arrangements (2:3 maize / cowpea & 1:1maize / cowpea intercrops) were investigated. There was Lower population density of Maruca vitrata among the 1:1 and 2:3 maize/cowpea intercrops compared with the population of Megalurothrips sjostedti. were observed on Ife brown was infested by a higher number of M. sjostedti and M. vitrata than Tvu 13076. Ife brown had higher number of beetles infesting its leaves than Tvu 13076 at the first and fourth weeks but was not significant. The incidence and damage caused by Ootheca mutabilis on the 2:3maize / cowpea intercrop were not significantly higher than on the 1:1maize / cowpea intercrop. Ife brown produced significantly higher seed yield (93.62a) than Tvu13076 (64.53b) while 2:3 maize/cowpea intercrop gave significantly higher seed yield (129.43a) than 1:1 maize / cowpea intercrop (32.72b). Consideration of planting pattern in intercropping appears to be a determinant factor for leaf infestation by this beetle. Intercropping may not necessarily reduce pest load in any given situation it depends on the crop and the pest in question. Key words: Intercropping Spatial arrangement Megalurothrips sjostedti Maruca vitrata
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Claims 8
Claim · model-written summary
Population density of Maruca vitrata was lower in 1:1 and 2:3 maize/cowpea intercrops than the Megalurothrips sjostedti population
- Taxon
- cowpea
Vigna unguiculatae0 - Treatment
- 1:1 and 2:3 maize/cowpea intercropse1
- Interactor
- Maruca vitrata
Maruca vitratae1pest - Outcome
- population density of Maruca vitratae1
- Direction
- Lowere1
- Comparator
- Megalurothrips sjostedtie1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two varieties of cowpea (Tvu 13076 and Ife brown)”
e1“There was Lower population density of Maruca vitrata among the 1:1 and 2:3 maize/cowpea intercrops compared with the population of Megalurothrips sjostedti”
Claim · model-written summary
Ife brown cowpea was infested by a higher number of M. sjostedti and M. vitrata than Tvu 13076
- Taxon
- cowpeaVigna unguiculatae0
- Material
- Ife browne2
- Interactor
- M. sjostedtiMegalurothrips sjostedtie2pest
- Second interactor
- M. vitrataMaruca vitratae2pest
- Outcome
- infestede2
- Direction
- highere2
- Comparator
- Tvu 13076e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two varieties of cowpea (Tvu 13076 and Ife brown)”
e2“Ife brown was infested by a higher number of M. sjostedti and M. vitrata than Tvu 13076”
Claim · model-written summary
Ife brown cowpea had a higher number of beetles infesting its leaves than Tvu 13076, not significant
- Taxon
- cowpeaVigna unguiculatae0
- Material
- Ife browne3
- Interactor
- beetlesColeopterae3pest
- Outcome
- number of beetles infesting its leavese3
- Direction
- highere3
- Qualifier
- at the first and fourth weekse3
- Comparator
- Tvu 13076e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two varieties of cowpea (Tvu 13076 and Ife brown)”
e3“Ife brown had higher number of beetles infesting its leaves than Tvu 13076 at the first and fourth weeks but was not significant”
Claim · model-written summary
Incidence and damage caused by Ootheca mutabilis were not significantly higher on 2:3 than on 1:1 maize/cowpea intercrop
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- 2:3maize / cowpea intercrope4
- Interactor
- Ootheca mutabilisOotheca mutabilise4pest
- Outcome
- incidence and damage caused by Ootheca mutabilise4
- Direction
- highere4
- Comparator
- 1:1maize / cowpea intercrope4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two varieties of cowpea (Tvu 13076 and Ife brown)”
e4“The incidence and damage caused by Ootheca mutabilis on the 2:3maize / cowpea intercrop were not significantly higher than on the 1:1maize / cowpea intercrop”
Claim · model-written summary
Ife brown cowpea produced significantly higher seed yield (93.62) than Tvu13076 (64.53)
- Taxon
- cowpeaVigna unguiculatae0
- Material
- Ife browne5
- Outcome
- seed yielde5
- Direction
- highere5
- Value
- 93.62ae5
- Qualifier
- 64.53be5
- Comparator
- Tvu13076e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two varieties of cowpea (Tvu 13076 and Ife brown)”
e5“Ife brown produced significantly higher seed yield (93.62a) than Tvu13076 (64.53b)”
Claim · model-written summary
The 2:3 maize/cowpea intercrop gave significantly higher seed yield (129.43) than the 1:1 intercrop (32.72)
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- 2:3 maize/cowpea intercrope6
- Outcome
- seed yielde6
- Direction
- highere6
- Value
- 129.43ae6
- Qualifier
- 32.72be6
- Comparator
- 1:1 maize / cowpea intercrope6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two varieties of cowpea (Tvu 13076 and Ife brown)”
e6“2:3 maize/cowpea intercrop gave significantly higher seed yield (129.43a) than 1:1 maize / cowpea intercrop (32.72b)”
Claim · model-written summary
Planting pattern in intercropping appears to be a determinant factor for leaf infestation by the beetle
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- planting pattern in intercroppinge7
- Interactor
- beetlee7pest
- Outcome
- leaf infestation by this beetlee7
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two varieties of cowpea (Tvu 13076 and Ife brown)”
e7“Consideration of planting pattern in intercropping appears to be a determinant factor for leaf infestation by this beetle”
Claim · model-written summary
Intercropping may not necessarily reduce pest load, depending on crop and pest
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- Intercroppinge1
- Outcome
- pest loade1
- Direction
- reducee1
- Qualifier
- may not necessarilye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two varieties of cowpea (Tvu 13076 and Ife brown)”
e1“Intercropping may not necessarily reduce pest load in any given situation it depends on the crop and the pest in question”
The same questions in other papers
Zea mays · yield · Vigna unguiculata (cowpea)Positive and negative results
17 papers in the same direction as this paper · 9 in the opposite direction
- negative
- negative
- negative
23 papers more in this group
See all 27 papers →intercropping · yield · Vigna unguiculata (cowpea)Results differ
62 papers in the same direction as this paper · 33 in the opposite direction · 7 reporting no difference from an alternative
- negative
- negative
- no effect
99 papers more in this group
See all 103 papers →intercropping · Maruca vitrata · Vigna unguiculata (cowpea)Positive and negative results
1 in the opposite direction
- negative
intercropping · Ootheca mutabilis · Vigna unguiculata (cowpea)Results agree
1 paper in the same direction as this paper
- no effect
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.