Abstract
French bean (Phaseolus vulgaris L.) is important in the socio-economic farming systems of East and Central Africa. It is a crop with great potential for addressing food insecurity, income generation and poverty alleviation in the region. Enhanced French bean productivity is hindered by a number of biotic and abiotic constraints as the crop is predominantly grown in open fields. The crop is mostly grown under irrigation and cannot withstand prolonged dry spells. Farmers rely heavily on insecticides to control insect pests. This increases the risk of rejection of their produce due to stringent maximum residue levels (MRLs) in export markets. This study was undertaken in the Horticulture Research and Teaching Field, Egerton University, Kenya to determine the potential of coloured net covers in improving French bean water use efficiency and insect pest exclusion. The experiment was set in a Randomized Complete Block Design (RCBD) with six treatments replicated four times. French bean ‘Source’ was grown under different coloured nets (white, blue, yellow, grey, and tricolour) and control (open field). Variables measured included; pest population, fresh pod yield, total plant biomass, leaf relative water content (LRWC) and water use efficiency for plant growth (WUE DW). Covering French bean with different coloured net covers reduced the numbers of silverleaf whitefly and black bean aphids. Coloured net covers enhanced crop performance marked by higher fresh pod yield and total plant biomass as well as improved LRWC and WUE DW of the crop. Results of this study present the potential of coloured net covers to be used as part of integrated French bean management programme(s) to reduce insect pest population and pesticide application while enhancing water use efficiency and crop performance under tropical field conditions.
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Claims 4
Claim · model-written summary
Coloured net covers reduced the numbers of silverleaf whitefly and black bean aphids on French bean compared with open field.
- Taxon
- French bean
Phaseolus vulgarise1 - Treatment
- different coloured net coverse1
- Interactor
- silverleaf whitefly
Bemisia argentifoliie1pest - Second interactor
- black bean aphids
Aphis fabaee1pest - Outcome
- numbers of silverleaf whitefly and black bean aphidse1
- Direction
- reducede1
- Comparator
- control (open field)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Covering French bean with different coloured net covers reduced the numbers of silverleaf whitefly and black bean aphids”
e2“and control (open field)”
Claim · model-written summary
Coloured net covers increased fresh pod yield and total plant biomass of French bean compared with open field.
- Taxon
- French beanPhaseolus vulgarise1
- Treatment
- Coloured net coverse3
- Outcome
- fresh pod yield and total plant biomasse3
- Direction
- highere3
- Comparator
- control (open field)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Covering French bean with different coloured net covers reduced the numbers of silverleaf whitefly and black bean aphids”
e2“and control (open field)”
e3“Coloured net covers enhanced crop performance marked by higher fresh pod yield and total plant biomass as well as improved LRWC and WUE DW”
Claim · model-written summary
Coloured net covers improved leaf relative water content and water use efficiency for plant growth of French bean compared with open field.
- Taxon
- French beanPhaseolus vulgarise1
- Treatment
- Coloured net coverse3
- Outcome
- LRWC and WUE DWe3
- Direction
- improvede3
- Comparator
- control (open field)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Covering French bean with different coloured net covers reduced the numbers of silverleaf whitefly and black bean aphids”
e2“and control (open field)”
e3“Coloured net covers enhanced crop performance marked by higher fresh pod yield and total plant biomass as well as improved LRWC and WUE DW”
Claim · model-written summary
Coloured net covers have potential to be used as part of integrated French bean management programmes to reduce pest populations and pesticide use while enhancing water use efficiency.
- Taxon
- French beanPhaseolus vulgarise4
- Treatment
- coloured net coverse4
- Outcome
- to be used as part of integrated French bean management programme(s)e4
- Setting
- tropical field conditionse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Results of this study present the potential of coloured net covers to be used as part of integrated French bean management programme(s) to reduce insect pest population and pesticide application while enhancing water use efficiency and crop performance under tropical field conditions”
The same questions in other papers
trap barrier · Bemisia argentifolii · Phaseolus vulgaris (common bean)Positive and negative results
1 reporting no difference from an alternative
- no effect
trap barrier · yield · Phaseolus vulgaris (common bean)Positive and negative results
6 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
4 papers more in this group
See all 8 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.