Water stress is known to enhance the accumulation of vitamins and cyanogenic glucosides in cassava (Manihotesculenta Crantz), a food security crop in Sub-Saharan Africa. A study was carried out to evaluation of the effects of dry and rainy seasons on cassava rootstoxicity and fungi associated with its rot. Laboratory work was done at Imo State University's Department of Plant Science and Biotechnology, while the field experiment was conducted at Nigeria's National Root Crop Research Institute in Umudike, Umuahia, Abia State. Two native varieties, L1 and L2, and four improved cassava cultivars were used: TME419, NR87/184, UMUCAS 46, and 07/0539. There were three iterations of the experimental field's randomised whole block design. After planting, each variety of cassava was allowed to grow for either twelve or fifteen months. In July, during the wet season, and December, during the dry season, their storage roots were gathered and analysed according to conventional techniques for cyanide, vitamins A and C, and carotenoids. Improved cassava cultivars accumulated more vitamins A and C, and carotenoids, while the native varieties accumulated more cyanide than the mproved cultivars. In contrast to the wet season, the dry season showed higher quantities of cyanide, vitamins A and C, and carotenoids in all the varieties Botryiodiplodiatheorbromae, Fusariumoxysporum, Aspergillusflavus, Rhizopusstolonifer, and Sclerotiumrolfsii are some of the fungal infections linked to cassava rot. The correlation between climate change and food quality will be brought to light in the study.
