WSU Extension

Hortsense

Plum, Prune (Fresh)
 
Disease
Armillaria root rot 
Bacterial canker 
Black knot 
Brown rot 
Crown gall 
Cytospora canker 
Plum pockets 
Russeting 
Shothole (Coryneum blight) 
Silver leaf 
Virus diseases 
Insect
Aphids 
Apple-and-thorn skeletonizer 
Brown marmorated stink bug 
Earwigs 
Fruittree leafroller 
Leafhoppers 
Pacific flatheaded borer 
Peach twig borer 
Peachtree borer 
Pear slug 
Scale insects 
Shothole borer 
Spider mites 
Spotted wing Drosophila (SWD) 



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Caption: Virus "rat-tail" symptoms
Photo by: R.S. Byther
  
Plum, Prune (Fresh) : Virus diseases
(revision date: 5/20/2014)


Biology
Virus diseases in prunes and plums cause many variable symptoms depending on the virus strain and the cultivar affected. For instance, tomato ringspot virus can cause failure of the graft union, ultimately killing trees. Trees infected with a virus may also show various symptoms of decline, collapse, or breakage, which may be confused with root rots or other disease problems. Virus disease transmission is specific for each virus. Insects, nematodes, and grafting are possible modes of transmission.
Management Options

Non-Chemical Management
  • Plant and graft only with certified, virus-free stock.
  • Remove and destroy any trees known to be infected with viruses.
  • The rootstock Marianna 2624 is reported to be resistant to the tomato ringspot virus, but it produces many suckers and has a shallow root system.
Select non-chemical management options as your first choice!

Chemical Management

None recommended

Images

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Caption: Virus "rat-tail" symptoms
Photo by: R.S. Byther
Caption: Cherry mottle leaf virus symptoms
Photo by: R.S. Byther
Caption: Vein-clearing symptom of virus infection
Photo by: R.S. Byther