One of the most common diseases of apple trees is Apple Scab, in which blotches which are brown or olive-green appear on the leaves. Aphids also can cause problems for apple trees.
Many types of diseases are attacks the main tree. It is depends upon the climatic conditions of the place. Some gray color on the leaves and holes in leaves are comes,many flys are the cause for destroy of tree,and fungus also be affected. So we have to take one step is clean the diseased leaves and burn them.
Cause: symptom:
Mildew Grey coating on leaves, young shoots. Aphids: Distorted shoots, leaves. Apple Sawfly Ribbon scars on apple skin
Winter Moth Holes in leaves
Codling Moth Maggot inside apple
Woolly Aphid White areas on bark,
Canker Sunken discolored patches on bark
Bitter Pit brown sunken areas on skin
Brown Rot browning of fruit
Scab blotches on leaves and fruit.
There are several diseases occur in apple trees, the important diseases are classified under three heads as, fungal, bacteria and pests like fireblight,scab,rust,downy mildew and black spot diseases. These diseases are mainly affecting the growth structure of the apple tree. The diseases are also hinders the growth of the apple tree.