Apple scab is a common fungal infection of crabapple and fruiting apple trees that spreads in years with cool, wet springs. Apple scab rarely kills a tree, but repeated severe infections can ...

Ask a Master Gardener: Scab hits Northland crab apple trees The wet spring and early summer were the perfect conditions for the fungus.

It is caused by a fungal disease called apple scab that infects crabapple leaves early in the spring. It starts out with brown spots often along leaf veins and continues to grow. Most people ...

Apple scab is caused by the fungus Venturia inaequalis. It will attack any varieties of crabapple and apple trees that are not apple scab resistant.

Our arboretum advisors recommend these five crabapple trees (three white, two magenta) as favorites. Note that "disease resistant" does not mean they are immune to apple scab.

Plant Medic columnist Ricky Kemery says apple scab and local drought contribute to poor-looking crabapple trees in Allen County.

The symptoms you describe certainly fit apple scab rather than fire blight. Your tree is probably resistant to apple scab as most varieties propagated and sold now are disease resistant varieties.