Phomopsis gall on hickory

(Phomopsis spp.)

Conservation Status
Phomopsis gall on hickory
  IUCN Red List

not listed

     
  NatureServe

not listed

     
  Minnesota

not listed

     
           
           
           
           
           
           
           
 
Description
 
 

There are at least 232 species of the fungus Phomopsis. Several of these produce abnormal swellings (galls) on bitternut hickory trees. The galls are identical in appearance and identification of the associated species in the field is not possible.

Galls may occur singly or in clusters on the trunk and branches. They are woody, rough, more or less round swellings. They can be from very small to 10 in diameter. They appear as tight clusters of nodules, each nodule up to 1 or more in diameter. If cut open they reveal disorganized woody tissue but no insect chambers or tunnels.

Spores are produced throughout the growing season and are spread by wind and rain splashes. It is believed that spores infect a host by entering a wound of a young twig. The fungus then spreads to branches and to the trunk. The galls do not kill the host but reduce vigor and girdle small branches causing dieback. Uninfected trees may occur near heavily infected ones.

 
     
 

Similar Species

 
     
     
 
Habitat and Hosts
 
 

bitternut hickory

 
     
 
Ecology
 
 

Season

 
 

Year-round

 
     
 
Distribution
 
 

Distribution Map

 

Sources: 7, 24, 30.

 
  5/28/2021      
         
 

Occurrence

 
 

 

 
         
 
Taxonomy
 
  Kingdom Fungi (fungi)  
  Subkingdom Dikarya  
  Division Ascomycota (ascomycetes)  
  Subdivision Pezizomycotina  
  Class Sordariomycetes  
  Subclass Sordariomycetidae  
  Order Diaporthales  
  Family Diaporthaceae  
  Genus Phomopsis  
       
 

Synonyms

 
     
       
 

Common Names

 
  Phomopsis gall on hickory  
       

 

 

 

 

 

 

 

Glossary

Gall

An abnormal growth on a plant produced in response to an insect larva, mite, bacteria, or fungus.

 
 
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Kate Clover

 
 

Many of the trees around this Bitternut Hickory, pictured were infested with this fungus.

 
    Phomopsis gall on hickory   Phomopsis gall on hickory  
           
           
 
MinnesotaSeasons.com Photos
 
 

Infestation

 
    Phomopsis gall on hickory   Phomopsis gall on hickory  
           
    Phomopsis gall on hickory   Phomopsis gall on hickory  
           
    Phomopsis gall on hickory   Phomopsis gall on hickory  
           
 

Gall

 
    Phomopsis gall on hickory   Phomopsis gall on hickory  
           

 

Camera

     
 
Slideshows
 
Phomopsis - fungi kingdom
Nineli Lishina
   
 
About

Published on Jan 24, 2015

Phomopsis - fungi kingdom

 
     

 

slideshow

       
 
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Visitor Sightings
 
           
 

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  Kate Clover
11/25/2020

Location: Grey Cloud Dune SNA, Cottage Grove. On riverside of rail tracks

Many of the trees around this Bitternut Hickory, pictured were infested with this fungus.

Phomopsis gall on hickory

 
           
           
 
MinnesotaSeasons.com Sightings
 
   

 

 

Binoculars


Created 3/12/2016

Last Updated:

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