International Journal of Biology Research

Authors
Faten N Mula Abed, Hadeel A Al-Ameri

Abstract
The world production of citrus is the highest among other types of fruit. At the University of Florida 4200, it was recorded that citruses contributed about 10 billion to the economy of the United States of America this year. Citrus fruits include many species, all of which belong to the family Rutacea the most important Citrus aurantium, Citrus paradise, Citrus sinensis,, Citrus lemon and Citrus reticulate, Citrus fruits are infected with different types of fungi such as Pencilium spp., Alternaria spp. and Rizopus spp., Which are found either in the soil, in irrigation or airborne, as well as in harvesting equipment and people working in the harvest, The most common cause of citrus rot around the world is Pencilium, especially P. italicum and P. digitatum, Gum disease in citrus is called by several names such as Brown rot gummosis, foot rot and rot of fibrous roots, and the causative agent was Phytophthora parasitica and P. citrophthora, Brown heartwood rot of lemons was found that two types of wood rotting fungi cause the decay and death of the branches of citrus trees, they are Antrodia sinuosa and Conophora eremophila, Alternaria brown spot Causative agent was Altternaria alternata, Phytophthora diseases are a complicated pathology produced by soil-borne Phytophthora species, and they are widely recognized as the most common fungal disease of citrus fruits practically everywhere in the globe.