Geneva: This is a fungal disease called "apple scab". It is very common in western Oregon. Some apple trees are almost completely resistant to it. Others are very susceptible. Most apples varieties are in between in susceptibility. A rainy spring like we are having makes  the disease "happier" and the apple more affected. You may see some "scabbiness" on the surface of the apples, hence the disease name. It can also cause distortion of the fruit. That said, you can peel away the scabbiness and the fruit itself is fine to eat.  

Treatments must start just after bloom. The hot/dry  weather we are expecting later this week should stop the disease on new leaves and any more damage to fruit for this summer.

If you want to know more, here is link about the disease: https://pnwhandbooks.org/plantdisease/host-disease/apple-malus-spp-scab 

Chip Bubl OSU Extension Agent/Columbia County (retired) 
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