In general, mix 3 tablespoons of the concentrate per gallon.

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 25, Crabapples are beautiful trees that grow well in the Dayton, OH area. However, many are susceptible to a number of crabapple diseases that cause them to drop leaves and generally look unhealthy by the end of summer.

If your crabapple has wilted and blackened leaves, dead or orange spots on the leaves, or strange orange growths, it’s likely caused by one of the three most common crabapple Estimated Reading Time: 7 mins.

For trees that are susceptible and retention of leaves is the goal, this would require applying fungicides at the correct time.

Flowering crabapples, also known as flowering crabs, are small, ornamental landscape trees that are prized for their attractive spring blossoms, which bloom in pleasing shades of pink, red or white.

If the flowering crab tree in your garden or home landscape is losing its leaves prematurely, it may be infected with a harmful fungal disease such as apple scab or cedar apple rust.