Evaluation of two plant leaf extracts on fungi associated with biodeterioration of cashew nuts in storage 

By M.N. Suleiman and A.F. Ogundana 

ABSTRACT

Three species of fungi isolated (Trichoderma viridae), Cephalosporium sp and Aspergillus nigar) were subjected to laboratory experiment involving in vitro control of the pathogens using plant extracts. Hot methanolic extractions from mango (Mangifera indica) and bitter – leaf (Vernonia amygdalina) leaves at 10%, 20%, 30% and 40% with the control (basal medium) concentrations tested on potato dextrose agar (PDA) for activity against mycelial growth were determined at 27+20C with three replicated plates. Vegetative growth values recorded were generally low compared with the control. Inhibitory action of the different extracts on vegetative growth increased with increase in concentration. Plant extracts readily available and affordable and environmentally friendly in the control of fungal disease. Plant extracts could serve as a reference material in further studies involving other pathogens of economic crops. 

Key words: Plant extracts, fungi, cashew nuts, concentrations, inhibition.  

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