This disease is caused by the fungi Sphaerotheca species or Podosphaera species and is most prevalent during dry, hot periods. The fungus causes gray-white powdery patches on leaves and new shoots. Ne

Powdery mildew of crabapple is typically seen on the foliage, but may also occur on twigs, blossoms, and fruit. Characteristic patches of white, powdery fungus develop on the leaves and terminal shoot

By Tracy Hodge, eHow Contributor The crabapple is susceptible to powdery mildew. The flowering crabapple is an ornamental tree that is popular in many homes and gardens. This tree has small edible

A fungus which appears as a dry powdery bloom on the upper sides of leaves, usually in hot dry conditions. Ornamental Malus and fruiting apple trees are most susceptible to the above species. Other sp

James Kilkelly, was GPI. Powdery mildew on Apple Trees. by GPI Plants affected Apple trees, both edible and crab apple. Season(s) Spring Summer Autumn. Signs and Symptoms.

Leaves Covered With White Powder Powdery Mildew - Powdery mildews are caused by fungi that live on the surface cells of the crabapple leaves, not inside them. Infected leaves are covered with a white