WSU Extension

Hortsense

Cherry
 
Disease
Armillaria root rot 
Bacterial canker 
Black knot 
Brown rot blossom blight and fruit rot 
Crown gall 
Cytospora canker 
Dead bud 
Gumming (Gummosis) 
Leaf spot 
Little cherry 
Mottle leaf 
Necrotic rusty mottle 
Powdery mildew 
Prunus necrotic ringspot 
Shothole (Coryneum blight) 
Verticillium wilt 
Witches'-broom (Cherry leaf curl) 
Insect
Apple-and-thorn skeletonizer 
Black cherry aphid 
Brown marmorated stink bug 
Cherry bark tortrix 
Cherry fruit fly 
Cutworms and armyworms 
Earwigs 
Leafrollers 
Peachtree borer 
Pear slug (Cherry slug) 
San Jose scale 
Shothole borer 
Spider mites 
Spotted wing Drosophila (SWD) 



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Caption: Shothole borer infestation holes
Photo by: A.L. Antonelli
  
Cherry : Shothole borer
(revision date: 5/20/2014)


Biology
Shothole borers are small (1/10" or less), brown to black, stubby-nosed beetles. Adults feed at the base of leaves or twigs. Later, they bore into the bark and lay eggs along a narrow gallery paralleling the grain of the wood. The white, legless grubs (bark beetles) feed by boring between the bark and sapwood, making narrow tunnels filled with sawdust-like frass (excrement). Feeding larvae can weaken or girdle trees. Larval galleries are typically at right angles to the first gallery, with the grubs pupating at the end of the galleries. The emerging adults leave tiny round "shotholes" in the bark, giving the beetle its name. Shothole borers are especially attracted to injured, stressed, or dying trees, but can also attack healthy trees. Fruit, ornamental, and forest trees and shrubs are attacked.
Management Options


Non-Chemical Management
  • Provide proper culture. Healthy trees are less likely to be attacked and more likely to survive infestations.
  • Prune out infested wood. Destroy prunings to reduce chances of reinfestation.
  • Whitewash trunks of young trees or purchase white plastic tree trunk wraps to prevent sunburn.
Select non-chemical management options as your first choice!

Chemical Management

Burn prunings and keep trees in vigorous growing condition. Borer attack usually indicates trees are in unhealthy condition.

Images

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Caption: Shothole borer infestation holes
Photo by: A.L. Antonelli
Caption: Shothole borer holes on apple
Photo by: R.S. Byther
Caption: Shothole borer galleries
Photo by: E.H. Beers
Caption: Bark beetle (very similar to shothole borer)
Photo by: A.L. Antonelli