Abstract
In 1986 and 1987, insect pests sampled on cowpea in the Cameroonian Southwest forest and Western derived savanna ecological zones included Maruca vitrata, Leguminivora (Cydia) ptychora, Helicoverpa (Heliothis) armigera, Melanagromyza vignalis, Apion disjunctum, Aphis craccivora, heteropteran bugs and bruchids. Under eight different deltamethrin spray schedules evaluated for their control at Foumbot, western derived savanna ecozone, the yield loss they caused ranged from 123.60 kg per ha in plants sprayed twice at the reproductive stage to 362.51 kg per ha in unsprayed plants in 1988; 21.86 kg per ha in plants sprayed three times at the reproductive stage to 90.73 kg per ha in unsprayed plants in 1989 and 91.72 kg per ha in plants sprayed 5 to 6 times at fortnightly intervals, to 184.08 kg per ha in unsprayed plants in 1990. The percentage loss due to Maruca vitrata, Melanagromyza vignalis and heteropteran bugs was high in sprayed and unsprayed plots. In 1989 and 1990, seed yields were significantly increased by spraying deltamethrin either forthnightly, or once at 75-100/ flowerbuds and once at 75-100/ podding, or once at 75-100/ flowering and once at 75-100/ podding.
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Claims 13
Claim · model-written summary
Eight pest groups were found on cowpea in the two Cameroonian zones.
- Taxon
- cowpea
Vigna unguiculatae0 - Interactor
- Maruca vitrata
Maruca vitratae0pest - Second interactor
- Melanagromyza vignalisMelanagromyza vignalise0pest
- Outcome
- insect pests sampled on cowpeae0
- Qualifier
- Maruca vitrata, Leguminivora (Cydia) ptychora, Helicoverpa (Heliothis) armigera, Melanagromyza vignalis, Apion disjunctum, Aphis craccivora, heteropteran bugs and bruchidse0
- Setting
- Cameroonian Southwest forest and Western derived savanna ecological zonese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“insect pests sampled on cowpea in the Cameroonian Southwest forest and Western derived savanna ecological zones included Maruca vitrata, Leguminivora (Cydia) ptychora, Helicoverpa (Heliothis) armigera, Melanagromyza vignalis, Apion disjunctum, Aphis craccivora, heteropteran bugs and bruchids”
Claim · model-written summary
In 1988 pest yield loss was 123.60 kg per ha with two reproductive sprays.
- Taxon
- cowpeaVigna unguiculatae1
- Treatment
- sprayed twice at the reproductive stagee0
- Outcome
- yield losse0
- Value
- 123.60 kg per hae0
- Qualifier
- 1988e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield loss they caused ranged from 123.60 kg per ha in plants sprayed twice at the reproductive stage to 362.51 kg per ha in unsprayed plants in 1988”
e1“insect pests sampled on cowpea”
Claim · model-written summary
In 1988 unsprayed plants lost 362.51 kg per ha of yield.
- Taxon
- cowpeaVigna unguiculatae1
- Treatment
- unsprayed plantse0
- Outcome
- yield losse0
- Value
- 362.51 kg per hae0
- Qualifier
- 1988e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield loss they caused ranged from 123.60 kg per ha in plants sprayed twice at the reproductive stage to 362.51 kg per ha in unsprayed plants in 1988”
e1“insect pests sampled on cowpea”
Claim · model-written summary
In 1989 pest yield loss was 21.86 kg per ha with three reproductive sprays.
- Taxon
- cowpeaVigna unguiculatae2
- Treatment
- sprayed three times at the reproductive stagee0
- Outcome
- yield losse1
- Value
- 21.86 kg per hae0
- Qualifier
- 1989e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“21.86 kg per ha in plants sprayed three times at the reproductive stage to 90.73 kg per ha in unsprayed plants in 1989”
e1“yield loss they caused”
e2“insect pests sampled on cowpea”
Claim · model-written summary
In 1989 unsprayed plants lost 90.73 kg per ha of yield.
- Taxon
- cowpeaVigna unguiculatae2
- Treatment
- unsprayed plantse0
- Outcome
- yield losse1
- Value
- 90.73 kg per hae0
- Qualifier
- 1989e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“21.86 kg per ha in plants sprayed three times at the reproductive stage to 90.73 kg per ha in unsprayed plants in 1989”
e1“yield loss they caused”
e2“insect pests sampled on cowpea”
Claim · model-written summary
In 1990 pest yield loss was 91.72 kg per ha with five to six fortnightly sprays.
- Taxon
- cowpeaVigna unguiculatae2
- Treatment
- sprayed 5 to 6 times at fortnightly intervalse0
- Outcome
- yield losse1
- Value
- 91.72 kg per hae0
- Qualifier
- 1990e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“91.72 kg per ha in plants sprayed 5 to 6 times at fortnightly intervals, to 184.08 kg per ha in unsprayed plants in 1990”
e1“yield loss they caused”
e2“insect pests sampled on cowpea”
Claim · model-written summary
In 1990 unsprayed plants lost 184.08 kg per ha of yield.
- Taxon
- cowpeaVigna unguiculatae2
- Treatment
- unsprayed plantse0
- Outcome
- yield losse1
- Value
- 184.08 kg per hae0
- Qualifier
- 1990e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“91.72 kg per ha in plants sprayed 5 to 6 times at fortnightly intervals, to 184.08 kg per ha in unsprayed plants in 1990”
e1“yield loss they caused”
e2“insect pests sampled on cowpea”
Claim · model-written summary
Maruca vitrata contributed high percentage loss in sprayed and unsprayed plots.
- Taxon
- cowpeaVigna unguiculatae1
- Interactor
- Maruca vitrataMaruca vitratae0pest
- Outcome
- percentage loss due to Maruca vitratae0
- Direction
- highe0
- Qualifier
- sprayed and unsprayed plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The percentage loss due to Maruca vitrata, Melanagromyza vignalis and heteropteran bugs was high in sprayed and unsprayed plots”
e1“insect pests sampled on cowpea”
Claim · model-written summary
Melanagromyza vignalis contributed high percentage loss in sprayed and unsprayed plots.
- Taxon
- cowpeaVigna unguiculatae1
- Interactor
- Melanagromyza vignalisMelanagromyza vignalise0pest
- Outcome
- percentage losse0
- Direction
- highe0
- Qualifier
- sprayed and unsprayed plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The percentage loss due to Maruca vitrata, Melanagromyza vignalis and heteropteran bugs was high in sprayed and unsprayed plots”
e1“insect pests sampled on cowpea”
Claim · model-written summary
Heteropteran bugs contributed high percentage loss in sprayed and unsprayed plots.
- Taxon
- cowpeaVigna unguiculatae1
- Interactor
- heteropteran bugse0pest
- Outcome
- percentage losse0
- Direction
- highe0
- Qualifier
- sprayed and unsprayed plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The percentage loss due to Maruca vitrata, Melanagromyza vignalis and heteropteran bugs was high in sprayed and unsprayed plots”
e1“insect pests sampled on cowpea”
Claim · model-written summary
Fortnightly deltamethrin spraying significantly increased seed yield.
- Taxon
- cowpeaVigna unguiculatae1
- Treatment
- spraying deltamethrin either forthnightlye0
- Outcome
- seed yieldse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed yields were significantly increased by spraying deltamethrin either forthnightly”
e1“insect pests sampled on cowpea”
Claim · model-written summary
Deltamethrin at flowerbud and podding stages significantly increased seed yield.
- Taxon
- cowpeaVigna unguiculatae1
- Treatment
- once at 75-100/ flowerbuds and once at 75-100/ poddinge0
- Outcome
- seed yieldse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed yields were significantly increased by spraying deltamethrin either forthnightly, or once at 75-100/ flowerbuds and once at 75-100/ podding”
e1“insect pests sampled on cowpea”
Claim · model-written summary
Deltamethrin at flowering and podding stages significantly increased seed yield.
- Taxon
- cowpeaVigna unguiculatae1
- Treatment
- once at 75-100/ flowering and once at 75-100/ poddinge0
- Outcome
- seed yieldse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed yields were significantly increased by spraying deltamethrin either forthnightly, or once at 75-100/ flowerbuds and once at 75-100/ podding, or once at 75-100/ flowering and once at 75-100/ podding”
e1“insect pests sampled on cowpea”
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111 papers in the same direction as this paper · 12 in the opposite direction · 2 reporting no difference from an alternative
- no effect
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See all 126 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.