Response of canning navy bean to application of fertilizers and pesticides
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Date
2011-09Author
Kinama, J. M.
Nderitu, J.H.
Chemining'wa, G.N.
Ogutu, P. O.
Language
enMetadata
Show full item recordAbstract
Low soil fertility, insect pests and diseases are the major constraints to
improvement of canning navy bean productivity in Kenya. A study was
conducted at the University of Nairobi's Kabete Field Station during 2010 short
and long rains to determine the effect of fertilizers and pesticides on growth,
yield and quality of canning navy beans. The fertilizer treatments were full dose
farmyard manure (8 tonnes/ha), half dose farmyard manure (4 t/ha) + half dose
NPK (100 kg/ha), Full dose NPK (200 kg/ha), Rhizobium inoculation, control
(no fertilizer) while the pesticide treatments were fungicide spray (Ortiva),
insecticide spray (Actara), fungicide spray (Ortiva) plus pesticide spray
(Actara) and Control (No spray). The experimental design was a randomized
complete block design laid out in a split plot arrangement with three
replications. The variety used was Mexican 142. Results demonstrated that
pesticide sprayed and fertilizer supplied plots had significantly(p:50.05) higher
plant count than non-treated control plots Organic fertilizers significantly (ps
0.05) increased the number of nodules but pesticide application had no effect.
Pesticide application significantly ((P:50.05) improved grain yield and quality
only in fertilizer supplied plots, while fertilizer treatments had no yield-effect in
unsprayed crops. Partial cost analysis demonstrated that application of half
dose farmyard manure (4 t/ha) plus half dose NPK (100 Kg/ha) in combination
with insecticide or insecticide+fungicide sprays was the most cost-effective
treatment regime. Pesticide sprays, Rhizobium inoculation and combined
moderate doses of organic and inorganic fertilizers have the potential to
improve navy bean productivity.
Citation
Optimimization of Agricultural Value Chains for sustainable DevelopmentSponsorhip
National Council of Science and Technology, The Kenya Seed CompanyPublisher
Faculty of Agriculture, University of Nairobi
Description
aGRO 2011 Biennial Conference presentation