Fungi are increasingly being blamed for spoiling commercially valuable fruits and vegetables. Five postharvest fungi of pepper fruits were studied for their population responses to gamma irradiation: Aspergillus niger, Aspergillus fumigatus, Colletotrichum capsici, C. trumcatum, and Fusarium solani. At a dosage rate of 1.08KGy/hour, these fungi were irradiated at doses of 0.2, 0.4, 0.6, and 0.8KGy. The D10 values of the organisms were calculated using the Stumbo equation. The fungus were inoculated on pepper fruits for 8 days, and biochemical/physiochemical parameters (pH, total ascorbic acid, total titratable acidity, and soluble solids) as well as physiological weight loss were measured. The study used a completely randomised block design. For D10 values and biochemical parameters, GenStat 12th edition was utilised with one- and two-way Anova. The D10 values ranged from 0.714 to 0.995 KGy, with Fusarium solani being the most radio resistant and Colletotrichum species being more vulnerable to gamma irradiation's deadly effect. In general, biochemical values of fungi-inoculated pepper fruits were higher than those of control samples. Because these fungi are either harmful or saprophytic to pepper fruits, gamma irradiation decontaminated fresh pepper fruits of their bioburden, increasing their postharvest life. The physiochemical properties of pepper fruits are also affected by fungi's degrading activities.
Author (S) Details
G. K. Frimpong
Biotechnology and Nuclear Agriculture Research Institute – GAEC, Ghana.
A. A. Adekunle
Department of Botany, University of Lagos, Nigeria.
T. O. Ogundipe
Department of Botany, University of Lagos, Nigeria.
A. A. Okyere
Biotechnology and Nuclear Agriculture Research Institute – GAEC, Ghana.
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