Incidence and within field dispersion pattern of pod borer, Helicoverpa armigera (Lepidoptera: Noctuidae) in chickpea in Ethiopia

Damte, T and Ojiewo, C O (2017) Incidence and within field dispersion pattern of pod borer, Helicoverpa armigera (Lepidoptera: Noctuidae) in chickpea in Ethiopia. Archives of Phytopathology and Plant Protection, 50 (17-18). pp. 868-884. ISSN 0323-5408

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Podborer is a major pest of chickpea in Ethiopia. Field surveys were conducted in 2013/2014 and 2014/2015 in central and northwestern Ethiopia to assess the prevalence and within field distribution of the pest. Although podborer was prevalent throughout the surveyed areas, there was a significant difference in larval density (0.10–3.75 larvae per m2) among zones and districts within zones. This variation was attributed to cropping history, cropping patterns, chickpea-crop adjacency, and weather (rainfall and temperature) conditions before and during the season as well as control measures applied. The optimum sample size required for precision ranged from 98, when podborer density was 10/m2, to 1045, when podborer density was ≤1/m2. Within field distribution of the larvae fitted a negative binomial distribution indicating that the larvae had a clumped/aggregated dispersion pattern. These results will enable chickpea stakeholders to develop and apply appropriate integrated crop management techniques for the control of podborer.

Item Type: Article
Divisions: Research Program : East & Southern Africa
Research Program : Genetic Gains
CRP: CGIAR Research Program on Grain Legumes
Uncontrolled Keywords: Helicoverpa armigera, Ethiopia, Incidence, chickpea, podborer, Integrated crop management
Subjects: Others > Crop Improvement
Others > Pest Management
Others > Helicoverpa
Mandate crops > Chickpea
Others > Ethiopia
Depositing User: Mr Ramesh K
Date Deposited: 10 Apr 2018 08:26
Last Modified: 11 Apr 2018 03:06
Official URL:
Projects: Tropical Legumes III (TL III)
Funders: Bill and Melinda Gates Foundation (BMGF)
Acknowledgement: The authors acknowledge Dr Negussie Tadesse, Asrat Zewudie, Eresi Megersa, Tayu Shewangizaw, Woncha Bejiga and Assefa Kebede for their help during data collection. This study was conducted jointly by Debre-Zeit Agricultural Research Center and the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) as part of the Tropical Legumes III project with financial support availed from Bill and Melinda Gates Foundation through ICRISAT.
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