ISOLATION AND PATHOGENICITY OF FUNGAL ORGANISMS CAUSING POSTHARVESTROT OF SWEET ORANGES, CUCUMBER AND LETTUCE IN GADAU MARKET
Abstract
Post-harvest losses of fruits and vegetables due to fungal spoilage pose serious economic and health challenges, especially in developing countries. This study aimed to isolate and determine the pathogenicity of fungal organisms responsible for post-harvest rot of sweet oranges (Citrus sinensis), cucumber (Cucumis sativus), and lettuce (Lactuca sativa) sold in Gadau Market. Samples showing visible signs of spoilage were collected and analyzed using standard microbiological techniques. Fungal isolates were cultured on Potato Dextrose Agar (PDA) and identified based on cultural and microscopic characteristics. Pathogenicity tests were conducted by inoculating healthy samples with the isolated fungi. Results revealed the presence of fungi such as Aspergillus spp., Penicillium spp., Rhizopus spp., and Fusarium spp. All isolates demonstrated varying degrees of pathogenicity on the tested produce. The study concludes that fungal contamination significantly contributes to post-harvest losses in Gadau Market. Proper handling, storage, and hygiene practices are recommended to reduce spoilage.
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