All of these apple scab-resistant crabapple trees are hardy in USDA zones 4.

Jul 25, Other Crabapple Problems. As with most other trees, crabapples can also be affected by a number of pests that are common to the Dayton area. Spider mites, aphids, and scale insects can cause leaf yellowing, wilting, spotted and distorted leaves, and even tree death. Environmental conditions, such as drought, can make crabapples vulnerable to Botryosphaeria canker, while wet or Estimated Reading Time: 7 mins.

Sep 21, A crabapple tree losing leaves early is indicative of disease. Two crabapple tree diseases in particular cause early defoliation: apple scab and cedar apple rust. The latter, however, is. Jul 31, Leaves yellow and fall prematurely, giving the tree a thin, bare appearance by mid-season.

Infected fruit have circular, rough spots on their surface. Venturia inaequalis.

In general, mix 3 tablespoons of the concentrate per gallon of water, and use up to 2 gallons on a large tree.

Grow resistant cultivars (see list below). Rake and destroy fallen leaves and fruit. Apply a fungicide as flower buds begin to show color (early pink) and again 3 weeks stumpmulching.barted Reading Time: 3 mins. Apr 17, Eastern tent caterpillar is a hairy black caterpillar with a white stripe down the back, brown and yellow lines along the side with a row of oval blue spots along the top line.

The larvae live communally in silken tents. They feed for 4 to 6 weeks and may defoliate small trees. When mature, they wander to protected site to spin a cocoon. May 08, However, some people have had issues with crabapple tree leaves turning brown or yellow. When you know that it isn’t time for the leaves to fall off of your crabapple tree, it’s going to be concerning to see this happen.

Feb 26, Your crabapple (Malus) may simply be suffering transplant shock. It's not unusual for a recently transplanted tree to develop a few yellow leaves. Unless the problem progresses, you may not need to do much. Keep the tree adequately watered for the first growing season. Feb 01, The answer is a fungal disease called apple scab. A fungus called Venturia inaequalis infects crabapple leaves early in the spring.

Most people don't notice the disease, though, until these infected leaves turn yellow and fall off the tree. Click to see full answer. Furthermore, how do you treat crabapple tree disease?