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Nematodes and Maize Growth in Nigeria I. Population Dynamics of Pratylenchus Brachyurus in and About the Roots of Maize and Its Effects On Maize Production At Ibadan

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Populations of Pratylenchus brachyurus increased significantly under maize and were most abundant during the rainy season from June through October. Populations reached their peak in soil around maize in June (299-435/100 g); in roots of maize in July (10,333-11,213/100 g); and in soils around weeds in October (3-4/100 g). Populations were low but detectable in soils at the peak of the dry season (December-January) and multiplied rapidly on maize from March to July. Populations under weeds were significantly lower than those under maize throughout the experiment and those within maize roots were also significantly higher than in soils under maize. Reduction in crop yield after three consecutive cropping seasons coincided with an increase in nematode populations both within and around maize roots.

Affiliations: 1: Department of Agricultural Biology, University of Ibadan, Nigeria


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