Influence of cultural practices on soil arthropods, leaf spot, pod damage, and yield of peanut in northern Ghana

Abudulai, M. and Dzomeku, I.K. and Salifu, A.B. and Nutsugah, S.K. and Brandenburg, R.L. and Jordan, D.L. (2007) Influence of cultural practices on soil arthropods, leaf spot, pod damage, and yield of peanut in northern Ghana. Peanut Science, 34 (2). pp. 72-78.

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Experiments in peanut (Arachis hypogaea L.) were conducted in northern Ghana, West Africa during 2003, 2004, and 2005 to determine interactions of cultivar, planting date, and weed management system on soil arthropod pest density, disease incidence, pod hull scarification and penetration from arthropod feeding, and pod yield. Experiments included four planting dates (28 May, 11 and 25 June, and 9 July), four cultivars (Chinese, Manipintar, JL 24, and RLRS-11), and three weed management systems (weeding four weeks, six weeks, or both four and six weeks after planting). The interaction of cultivar and planting date was significant for millipede (Peridontopyge spp.) density, penetrated pods, and pod yield. Cultivar and planting date affected density of white grubs (Schyzonicha spp.), termites (Microtermes and Odontotermes spp.), and wireworms (Elateridae); incidence of early leaf spot (Cercospora arachidicola Hori) and late leaf spot [Cercosporidium personatum (Berk. & M.A. Curtis) Deighton]; and scarified pods independently. Millipede density was similar for all planting dates with the cultivars Chinese and JL 24 but was higher for the cultivars Manipintar and RLRS-11 when planted early. Incidence of early and late leaf spot was higher when peanut was planted 11 June compared with planting 28 May, 25 June, or 9 July. The cultivars Chinese and JL 24 were more susceptible to these diseases than Manipintar or RLRS-11. Weed management did not affect arthropod pest density. However, weeding at both four and six weeks after planting resulted in higher incidence of early leaf spot than weeding once at either four or six weeks after planting. Pod yield for the cultivars Chinese, Manipintar, and JL 24 was the highest when planted early; yield of RLRS-11 was similar across planting dates. Higher yield from early plantings was associated with rainfall patterns common for the region, and most likely affected yield more than arthropod damage or disease. Removing weeds at six weeks after planting was sufficient to maintain optimum yield

Item Type: Article
Author Affiliation: CSIR-Savanna Agricultural Research Institute, P. O. Box 52, Tamale, Ghana
Subjects: Plant Production
Plant Production > Production Practices
Plant Protection > Pests
Divisions: Groundnut
Depositing User: Mr B Krishnamurthy
Date Deposited: 12 May 2011 08:08
Last Modified: 12 May 2011 08:08
Official URL:[72:IOC...

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