Abstract
Rhizopus sp, Mucor sp, Collectotrichum capsici and Geotrichum candidum were isolated but pathogenic test revealed that Collectotrichum capsici and Geotrichum candidum were the most pathogenic of all the isolates. Ni2+ + Azo has the highest inhibitory effect, closely followed by Ni2+ + PAN while Copper (II) complex of Thiourea has the lowest inhibitory effect. However, 10mg/ml concentration proved to be the most effective when radial mycelial growth of the test fungi was measured. The inhibitory effects of each complex on the isolates increases with increase in incubation period. There is the feasibility of using synthetic 
 associated with the symptoms. The three synthetic compounds, Copper (II) complex of Thiourea, Ni2+ + compounds as preservatives for harvested red pepper.
Highlights
Pepper (Capsicum sp.) belongs to the family Solanaceae
The results of the pathogenicity tests revealed two of the isolated fungi as the most pathogenic. They were identified as Geotrichum candidum and Collectotrichum capsici
The effect of the three chemical complexes on the growth of Geotrichum candidum and Collectotrichum capsici are shown in Fig. 1 to Fig. 6
Summary
Pepper (Capsicum sp.) belongs to the family Solanaceae. The two original species of Capsicum recognized by King (1974) and Purseglove (1991) are Capsicum annum L. and Capsicum frutescens L. Post-harvest diseases destroy 10-30% of the total yield of crops and in some perishable crops especially in developing countries, they destroy more than 30% of the crop yield (Agrios, 2005; Kader, 2002). Many chemicals have been used in the past to protect the fruits against microbial spoilage, but most of them are only microstatic and very toxic to man and animal (Avakyan, 1974). Some of such chemicals that have been previously used include Pb, Zn, Fe, Cr and a host of others (Avakyan, 1974; Luken, 1971; Marsh, 1977)
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