Mango (Mangifera sp.) suffers from several diseases at all stages of its life. All the parts of the plant, namely, trunk, branch, twig, leaf, petiole, flower and fruit are attacked by a number of pathogens including fungi, bacteria and algae. They cause several kinds of rot , die back , anthracnose , scab , necrosis, blotch, spots, mildew , etc. Some of these diseases like powdery milde w are of great economic importance as they cause heavy losses in mango production.