Evaluation of Selected Pigeonpea (Cajanus cajan (L.) Millsp.) Genotypes for Resistance to Insect Pest Complex in Dry Areas of North Rift Valley, Kenya

Cheboi, J J and Kimurto, P K and Kinyua, M G and Kiplagat, O K and Towett, B K and Kiptoo, J J and Kirui, S C and Kimno, S and Gangarao, N V P R (2016) Evaluation of Selected Pigeonpea (Cajanus cajan (L.) Millsp.) Genotypes for Resistance to Insect Pest Complex in Dry Areas of North Rift Valley, Kenya. American Journal of Experimental Agriculture, 10 (5). pp. 1-9. ISSN 2231-0606

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Abstract

Pigeonpea is an important pulse crop that has gained importance in semi-arid tropics, although its yield potential has not been fully realized due to biotic and abiotic stresses that limit its production. Insect pest complex of pod borer (Helicoverpa armigera), sucking bug (Clavigralla tomentosicollis) and pod fly (Melanagromyza cholcosoma) are the major limiting factors to its production causing up to 100% yield loss. The objective of this study was to evaluate resistant genotypes to insect pest complex in dry parts of North Rift Valley Kenya. The study was carried out in three sites (Kenya Agricultural Livestock Research Organization- Marigat, Agricultural Training Centre-Koibatek and Fluorspar-Chepsirei) for one season during long rain of April-November 2014 growing season. Sixteen ICRISAT elite genotypes were evaluated in randomized complete block design (RCBD) with 75cm inter and 25 cm intra spacing. Significant (P≤0.05) differences in grain yield performance, incidence and severity of the insect pests were revealed in all sites. The damage was more severe in Marigat (Pod borer-37.2%, Sucking bug-39.3% and pod fly-5.9%) than ATC- Koibatek (Pod borer-1.9%, Sucking bug-8.4% and pod fly-5.9%) and Fluorspar (Pod borer-3.6%, Sucking bug-6.8% and pod fly-2.9%). Genotypes ICEAPs 00850R, 00902, 01541 and 1154-2 showed potential levels of resistance to the insect pest complex and high yields. Grain yield associated negatively (P≤0.05) with pod borer and sucking bug damage correlated non-significantly with pod fly damage. The potential genotypes identified in this study need to be further evaluated in two seasons and in other multi-locations to validate these findings to be used in breeding.

Item Type: Article
Divisions: Research Program : East & Southern Africa
CRP: CGIAR Research Program on Grain Legumes
Uncontrolled Keywords: Pigeonpea; insect pest complex; resistance; yield potential; yield loss
Subjects: Mandate crops > Pigeonpea
Others > Genetics and Genomics
Others > African Agriculture
Others > Kenya
Depositing User: Mr Ramesh K
Date Deposited: 11 Apr 2017 08:42
Last Modified: 17 Apr 2017 08:34
URI: http://oar.icrisat.org/id/eprint/9949
Official URL: http://doi.org/10.9734/AJEA/2016/22216
Projects: UNSPECIFIED
Funders: UNSPECIFIED
Acknowledgement: This research was supported by grants from National Commission for Science, Technology and Innovation (NACOSTI) and International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) through pigeonpea- legume tropical II project.
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