The investigation was aimed to study aspects of storage as for : Isolation and identification of the causal fungi involved in rotted tomato and pepper fruits in Egypt and Germany , as well as squash and cucumber in Egypt . The pathogenic capability and the virulence of the isolated fungi on squash , cucumber , tomato and pepper at different ripening stages of fruit. The effect of some physiological and other physical factors on tested species of Alternaria . Chemical constituent that had value on nutrition such as sugar contents, total nitrogen, phosphorus, calcium, percentage of TSS and acidity as well as the amount of vitamine c in tomato and pepper fruit cultivars infected and uninfected with five Alternaria Spp.