Abstract
) is often infested by a complex of insect pests, but bean flies, aphids, bean leaf beetles, and flower thrips are the most important. Whereas yield losses due to these pests have been established, there is limited information on their population dynamics at different stages of crop growth and their effect on yield and yield components. In order to describe the population dynamics of selected common bean pests at various phases of bean crop growth, and their impact on yield and yield components, a study was carried out in Uganda during the 2016 second rains and the 2017 first rains in three agro-ecological zones. Bean flies, bean aphids, bean leaf beetles, whitefly, striped bean weevil, leafhoppers, and caterpillars were the main insects observed. Pesticide spray schedules were imposed to generate different populations of insect pests whose effects on yield and its components were determined. The findings indicate that spray regimes significantly influenced the abundance of bean flies and leafhoppers, but not the other insect pests. Additionally, except for caterpillars, insect pests were significantly influenced by crop growth stages, but only leafhoppers exhibited a significant negative relationship with grain yield. Furthermore, yield and yield components varied significantly between spray regimes, and there was a significant positive relationship between grain yield and yield components. Our study is important for informing growers on the stage of crop growth at which management tactics such as use of insecticides can be applied for different insect pests.
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Claims 15
Claim · model-written summary
Bean flies were among the main insects observed.
- Taxon
- Bean flies
Ophiomyia phaseolie0 - Outcome
- main insects observede0
Not reportedSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bean flies, bean aphids, bean leaf beetles, whitefly, striped bean weevil, leafhoppers, and caterpillars were the main insects observed.”
Claim · model-written summary
Bean aphids were among the main insects observed.
Verbatim
e0“Bean flies, bean aphids, bean leaf beetles, whitefly, striped bean weevil, leafhoppers, and caterpillars were the main insects observed.”
Claim · model-written summary
Bean leaf beetles were among the main insects observed.
Verbatim
e0“Bean flies, bean aphids, bean leaf beetles, whitefly, striped bean weevil, leafhoppers, and caterpillars were the main insects observed.”
Claim · model-written summary
Whitefly was among the main insects observed.
Verbatim
e0“Bean flies, bean aphids, bean leaf beetles, whitefly, striped bean weevil, leafhoppers, and caterpillars were the main insects observed.”
Claim · model-written summary
Striped bean weevil was among the main insects observed.
Verbatim
e0“Bean flies, bean aphids, bean leaf beetles, whitefly, striped bean weevil, leafhoppers, and caterpillars were the main insects observed.”
Claim · model-written summary
Leafhoppers were among the main insects observed.
- Taxon
- leafhoppersCicadellidaee0
- Outcome
- main insects observede0
Verbatim
e0“Bean flies, bean aphids, bean leaf beetles, whitefly, striped bean weevil, leafhoppers, and caterpillars were the main insects observed.”
Claim · model-written summary
Caterpillars were among the main insects observed.
Verbatim
e0“Bean flies, bean aphids, bean leaf beetles, whitefly, striped bean weevil, leafhoppers, and caterpillars were the main insects observed.”
Claim · model-written summary
Spray regimes significantly influenced bean fly abundance.
- Taxon
- bean fliesOphiomyia phaseolie0
- Treatment
- spray regimese0
- Outcome
- abundance of bean fliese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“spray regimes significantly influenced the abundance of bean flies and leafhoppers, but not the other insect pests”
Claim · model-written summary
Spray regimes significantly influenced leafhopper abundance.
- Taxon
- leafhoppersCicadellidaee0
- Treatment
- spray regimese0
- Outcome
- abundance of bean flies and leafhopperse0
Not reportedComparatorDirection
Verbatim
e0“spray regimes significantly influenced the abundance of bean flies and leafhoppers, but not the other insect pests”
Claim · model-written summary
Spray regimes did not significantly influence abundance of the other insect pests.
Not reportedComparatorDirection
Verbatim
e0“spray regimes significantly influenced the abundance of bean flies and leafhoppers, but not the other insect pests”
Claim · model-written summary
Crop growth stage significantly influenced insect pests other than caterpillars.
Not reportedDirection
Verbatim
e0“except for caterpillars, insect pests were significantly influenced by crop growth stages”
Claim · model-written summary
Caterpillars were not significantly influenced by crop growth stage.
Not reportedDirection
Verbatim
e0“except for caterpillars, insect pests were significantly influenced by crop growth stages”
Claim · model-written summary
Leafhoppers had a significant negative relationship with grain yield.
- Taxon
- leafhoppersCicadellidaee0
- Interactor
- leafhoppersCicadellidaee0
- Outcome
- grain yielde0
- Direction
- negativee0
Verbatim
e0“only leafhoppers exhibited a significant negative relationship with grain yield”
Claim · model-written summary
Yield and yield components varied significantly between spray regimes.
- Taxon
- Common Bean
Phaseolus vulgarist0 - Treatment
- spray regimese0
- Outcome
- yield and yield componentse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield and yield components varied significantly between spray regimes”
t0“Common Bean”
Claim · model-written summary
Grain yield had a significant positive relationship with yield components.
Not reportedTaxon
Verbatim
e0“significant positive relationship between grain yield and yield components”