WSU Extension

Hortsense

Apple
 
Disease
Anthracnose and Bull's-eye rot 
Bitter pit 
Burrknot 
Crown and collar rot 
Crown gall 
Cytospora canker 
Fire blight 
Fruit russeting 
Nectria canker (European canker) 
Nectria twig blight (Coral spot) 
Perennial canker (Bull's-eye rot) 
Phytophthora fruit rot 
Powdery mildew 
Scab 
Virus diseases 
Insect
Aphids 
Apple ermine moth 
Apple maggot 
Apple-and-thorn skeletonizer 
Brown marmorated stink bug 
Codling moth 
Cutworms and armyworms 
Earwigs 
Fruittree leafroller 
Leafhoppers 
Leafrollers 
Lecanium scale 
San Jose scale 
Spider mites 
Tent caterpillars 
Tentiform leafminer 



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Caption: Apple mosaic virus
Photo by: R.S. Byther
  
Apple : Virus diseases
(revision date: 5/20/2014)


Biology
Virus diseases of apples are rarely significant problems in home orchards. Symptoms are most commonly seen as bark disorders, leaf mottling, or misshapen fruit. One of the more common virus problems is apple mosaic. Apple mosaic virus is most commonly seen on older (heirloom) apple varieties. This disease causes creamy to yellow mottling, spotting, or vein yellowing visible mainly on the upper surface of leaves. Extremely sensitive varieties may lose leaves. Apple mosaic is transmitted by grafting or natural root grafts and spreads slowly.
Management Options

Non-Chemical Management
  • Do not perform grafts with wood from infected trees.
  • Remove and destroy severely affected trees, if desired.
Select non-chemical management options as your first choice!

Chemical Management

None recommended

Images

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Caption: Apple mosaic virus
Photo by: R.S. Byther