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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/9586

Title: Rice Husk Extract is Potentially Effective as a Phytopesticide against Root-/Soil-borne Fungal Pathogens of Cowpea
Authors: Akintokun, A.K.
Killani, A.S.
Abaidoo, R.C.
Keywords: fungal pathogens
antagonism
bioprotectant
pathogenicity
Phytopesticides
Issue Date: 2011
Publisher: Nature and Science
Citation: Nature and Science, 2011;9(3)
Abstract: Phytopesticide produced from rice husk extract (RHE) was evaluated, in the laboratory and in the glasshouse as a potential biocontrol agent for controlling root- and soil-borne fungal pathogens isolated from field-grown cowpea in the northern Guinea savanna of Nigeria. The pathogenicity test was carried out in the glasshouse on the fungal species isolated from infected plants in cowpea field trials conducted in 2006 and 2007 cropping seasons. Five root- and soil-borne fungal pathogens: Fusarium verticilloides, F.equiseti, F.solani, F. oxysporum and Rhizoctonia solani, were the major highly virulent fungal pathogens which caused severe problems including damping off, root rot, reduction in nodulation, vascular wilt/discoloration, chlorosis, necrotic lesions, leaf blight, complete defoliation, seedling mortality, and death in cowpea. Plants from the glasshouse experiments (on the microbial antagonism study) were examined for disease incidence and severity symptoms. In–vitro and in–vivo studies revealed that RHE significantly (P<0.05) inhibited all the five fungal pathogens at 1.5% concentration. However, at 1% concentration of RHE did not inhibit mycelia radial growths of F. verticilloides, F. equiseti and F. oxysporum after 7 days incubation in-vitro. The RHE was phytotoxic on cowpea seedlings at 2% concentration. The RHE can thus be regarded as a potential bioprotectant as an alternative to chemical pesticides which are known to be environmentally unsafe for the management of common root- and soil–borne fungal pathogens of cowpea.
Description: This Article was published by Nature and Science, 2011;9(3)
URI: http://hdl.handle.net/123456789/9586
Appears in Collections:College of Science

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