Fungi associated with diseases of Dichrostachys cinerea and Parkia biglobosa trees in Amurum forest reserve

Abstract

This study was carried out to determine the identity of fungal pathogens associated with diseases of Dichrostachys cinerea (L.) Wight & Arn and Parkia biglobosa (Jacq.) R.Br. ex G. Don in the Dry Savannah habitat of Amurum forest reserve. Random sampling was used to lay down the temporary sample plot and the survey involved sampling leaves and stems from tender and old trees that show symptoms such as abnormal growth, branch splits, chlorosis, stem canker, dieback, spots on leaves, galls and stunted growth. The diseased samples were taken to the laboratory for culture, isolation and identification of pathogens. Eight fungal species were isolated and identified: Aspergillus niger, Choanephora cucurbitarum, Fusarium oxysporum, Fusarium solani, Lasiodiplodia theobromae, Pestalotiopsis spp, Thermomyces lanuginosus and Trichoderma harzianum from the diseased trees. This study provides a foundation for future work to develop management strategies aimed at reducing the impact of these pathogens in the Reserve because, without knowledge of the identity of these disease-causing agents, it is not possible to accurately design control methods aimed at reducing the inoculum level of the pathogenic organisms.