Crabapple trees are part of the malus genus of trees that are native to north america asia and europe with white or pink flowers and small red apples. Fungus and bacteriainfecting the tree in various locations cause these.
These threats can easily spread to cultivated apple trees and will eventually reduce the health of the tree.
Crab apple tree diseases uk. Falling leaves reveal the glorious color of the fruit. Branches die back and become covered with dark brown to black pimple like fungal fruiting structures. The snow of winter accents fruit branches and tree shape.
Apple pear prunus crab apple pyracantha cotoneaster elm hawthorn and mountain ash trees. Your tree is affected by the disease apple scab. Crabapples flower in the spring but like other plants are susceptible to various forms of disease stemming from bacteria and fungus.
The most likely cause is a disease called silver leaf which can also cause branch dieback. It is no wonder crabapples are called jewels of the landscape. By david marks like all plants apples suffer from their fair share of pests and diseases.
As autumn arrives crabapple foliage and fruit transform to match the vibrant colors of an artists palette. It usually appears in early to mid spring and is more prevalent during rainy weather. This disease can also attack the fruit see below.
Why have the leaves on one branch of my tree turned a silvery colour. Common disease types associated with the crabapple tree include fire blight apple scab apple rust and powdery mildew. Apple scab is one of the most common and most serious diseases that afflict apple trees.
Informational table showing disease name symptoms pathogencause and management of crabapple diseases. The disease is caused by the fungus venturia inqequalis which overwinters in infected leaves left on the ground. Leaves on affected branches wilt and die.
The bacterial disease fireblight gives the appearance of being scorched. The leaves on the young shoots of my apple tree are curled and sticky. You might assume such trees are passed it but they may.
Wood under the bark is dark brown. Apple tree pests diseases and problems. The good news though is that selecting the correct variety for your area of the uk and your particular soil conditions can reduce the risk of problems considerably.
The crab apple is susceptible to a variety of fungal infections including apple scab honey fungus and apple canker. At some time or other many of us inherit very old gnarled unproductive apple trees that simply dont yield very well any more and may appear as if they are on their last legs. Apple tree pests and diseases.
About apple woolly aphid adult aphids are up to 2mm long and elliptical in shape. Some diseases can be seen on the leaves and others on the bark branches blossoms or spread throughout the entire tree. Apple tree pests diseases and problems rejuvenating old trees.