Abstract
Bean Stem Maggot (BSM) is a serious production problem in many African countries. In South Africa, the problem receives very little research and extension attention. This study set out to assess the magnitude of the BSM problem at Greytown during the 1995 season. Using a split-plot trial, split for insecticide or no insecticide, cultivar reaction to BSM was determined. The trial contained sixteen cultivar entries, including three local controls. Assessment of the potential threat of BSM to local production was made by comparisons across treatments using the local control variety Wartburg. Seed treatment with endosulfan was effective in eliminating seedling mortality due to BSM. In comparing the treated versus untreated plots of Wartburg, the plant population reduction attributable to BSM was 10.9 percent. On average; treated Wartburg plots supported 0.93 BSM larvae/pupae plant(-1) compared to 3.7 BSM larvae/pupae plant(-1) in the untreated plots. The resultant yield loss due to the combined effect of plant stand reduction and the deleterious effects of the larvae and pupae amounted to 11.39 percent. With subsistence agriculture in KwaZulu Natal (KZN), where low fertility and late plantings are the norm, the effects of BSM can be expected to be more severe still. The findings of this study justify the call for more extension and research resources to be allocated to the BSM problem.
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Claims 6
Claim · model-written summary
Seed treatment with endosulfan was effective in eliminating bean seedling mortality due to bean stem maggot.
- Taxon
- beant0
- Treatment
- Seed treatment with endosulfane0
- Interactor
- BSMe0pest
- Outcome
- seedling mortality due to BSMe0
- Direction
- eliminatinge0
Not reportedComparator
Verbatim
e0“Seed treatment with endosulfan was effective in eliminating seedling mortality due to BSM”
t0“bean stem maggot”
Claim · model-written summary
Comparing treated versus untreated Wartburg plots, the plant population reduction attributable to bean stem maggot was 10.9 percent.
Verbatim
e0“In comparing the treated versus untreated plots of Wartburg, the plant population reduction attributable to BSM was 10.9 percent”
t0“bean stem maggot”
Claim · model-written summary
Treated Wartburg plots supported 0.93 bean stem maggot larvae/pupae per plant compared with 3.7 in untreated plots.
Verbatim
e0“On average; treated Wartburg plots supported 0.93 BSM larvae/pupae plant(-1) compared to 3.7 BSM larvae/pupae plant(-1) in the untreated plots”
t0“bean stem maggot”
Claim · model-written summary
The yield loss due to combined plant stand reduction and the effects of larvae and pupae amounted to 11.39 percent.
Verbatim
e0“The resultant yield loss due to the combined effect of plant stand reduction and the deleterious effects of the larvae and pupae amounted to 11.39 percent”
t0“bean stem maggot”
Claim · model-written summary
The authors expect the effects of bean stem maggot to be even more severe in subsistence agriculture in KwaZulu Natal with low fertility and late plantings.
Verbatim
e0“With subsistence agriculture in KwaZulu Natal (KZN), where low fertility and late plantings are the norm, the effects of BSM can be expected to be more severe still”
t0“bean stem maggot”
Claim · model-written summary
The authors conclude the findings justify allocating more extension and research resources to the bean stem maggot problem.
Verbatim
e0“The findings of this study justify the call for more extension and research resources to be allocated to the BSM problem”
t0“bean stem maggot”
The same questions in other papers
endosulfan · pest · Phaseolus vulgaris (common bean)Results agree
1 paper in the same direction as this paper
- positive
seed treatment · pest · Phaseolus vulgaris (common bean)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
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.