Browsing by Author "O. Arogundade"
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- ItemAssessments of Sweet potato Virus Disease and Influence of Mulching and Organic Insecticide on Sweet Potato Varieties in Kwara State of Nigeria(2020) T. H. Aliyu; J. Popoola; L. K. Olatinwo; E. K. Eifediyi; O. Arogundade; B. H. TaiwoAssessments of 30 sweet potato farms in three districts of Kwara State of Nigeria were carried out to evaluate the incidence of sweet potato virus disease (SPVD). A serological study by Antigen-coated plate enzyme-linked immunosorbent assay (ACP-ELISA) was set up to assay six viruses on sweet potato samples. A field experiment to appraise the influence of variety, mulch and organic insecticide on virus incidence was performed on two genetically improved sweet potato varieties. The surveys revealed the occurrence of SPVD in all locations with incidence from 2.6% in Oyun (Kwara Central district) to 39.1% in Agbamu (Kwara South district). The serology test confirmed the predominance of Sweet potato feathery mottle virus (SPFMV) and Sweet potato chlorotic stunt virus (SPCSV) correspondingly as 100% and 30% respectively in the study. The field experiment indicated lower virus disease incidence (15.3%) and increased numbers in storage roots (7.5/plant) and weight of storage roots (32.4 kg/plant) in Orange Fleshed Sweet Potato variety, mulched with organic insecticidal treatment. This is the first authentication of the occurrence and prevalence of sweet potato virus disease in Kwara State, Nigeria. The study recommends Orange Fleshed Sweet Potato variety, mulching with guinea corn stalk and organic insecticide application for sustainable management of SPVD, particularly for resource-poor farmers.
- ItemSeverity of Viral Diseases and Types of Weeds as Alternative Viral Hosts in <em>Dioscorea</em> Fields in Southern Guinea Savannah Agroecology of Nigeria(2021) T. H. Hussein Aliyu; F. O. Takim; L. K. Olatinwo; O. Arogundade; K. F. Funmilayo Omotesho; D. A. OladojaThe incidence and severity of viruses infecting yam and weeds were determined on 60 Dioscorea farms in Southern Guinea Savannah Agroecology of Kwara State, North-Central Nigeria. Double Antigen Sandwich Enzyme Linked Immunosorbent Assay (DAS ELISA) was used as a serological technique to detect Yam mosaic virus (YMV) and Cucumber mosaic virus (CMV) on Dioscorea and weeds collected from the farms. The survey indicated virus incidence on Dioscorea between 62.8% and 100% and virus severity between 2 and 5 score values. DAS-ELISA detected YMV in all the Dioscorea leaf samples and mixed infection of YMV with CMV in 13 samples. Twenty-nine (29) weed species were found to be predominant on Dioscorea fields which comprised of annuals and broadleaves. DAS-ELISA revealed high YMV titer values for the weed species, Eclipta alba, Euphorbia heterophylla, Oldenlandia herbacea, Cynodon dactylon and Phyllantus amarus. However, CMV was not found in any of the sampled weed species. The study showed a high occurrence of viruses on Dioscorea and the preponderance of weeds which could serve as vectors of viruses. There is a need for efficient management strategies for virus and weed elimination within and around yam fields which will invariably be an attraction to farmers with limited resources for optimum yam production.