| Abstract: |
Mango, Mangifera indica L., is grown throughout the subtropics and tropics and is one of the world’s most important fruit crops as well as in Egypt. Grafted and non-grafted trees are cultivate, the former using exotic scions on local rootstocks; non-grafted trees are selections from grown trees with good fruit qualitiesHowever, the mango is known to suffer from a number of diseases caused by different organisms, which affects different parts of plants, at all stages of growth and development. Powdery mildew (Oidium mangiferae), fruit rot (Aspergillus niger), leaf blight (Pestaloptiopsis mangiferae), stem blight or die back (Diplodia spp.) and root rot (Rhizoctinia and Fusarium species) are recorded as fungal diseases. No information regarding the extent of damage to the plant is available, but some of these are certainly responsible for causing considerable damage and become a limiting factor in many mango growing areas. Root rot is also prevalent in almost all orchards, manifest itself as withering and drying of the plant from top to bottom and whole plant die up. Initially rootlets are affected and are rotten, later on the smaller, tertiary roots and ultimately the bigger, secondary and primary main roots are infected which result in gradual decline of the plant and the plant die. The uptake of nutrients and water is blocked due to the rotting of the roots, which results in drying of the plants.In Egypt, soil borne diseases are of great economic importance as they cause heavy losses in mango production. During the last few years, soil borne diseases (including root rot
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