Phomopsis gall on hickory

(Phomopsis spp.)

               
Conservation Status

IUCN Red List

not listed

Phomopsis gall on hickory

NatureServe

not listed

Minnesota

not listed

Occurrence

 

Season

Year-round

Habitat/Hosts

bitternut hickory (Carya cordiformis)

 

 

 

 

 

 

 
Identification

Several species of the fungus Phomopsis cause abnormal swellings (galls) on bitternut hickory trees.

Galls may occur singly or in clusters on the trunk and branches. They are woody, rough, more or less round swellings. They can be 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.

 
Similar
Species

 

 
Distribution Distribution Map  

Sources: 7.

 
Comments

There are at least 232 species of the fungus Phomopsis. Several of these produce bark galls on bitternut hickory. The galls are identical in appearance making identification of the associated species in the field impossible.

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.

 
Taxonomy

Division:

Ascomycota (ascomycetes)

  no rank:

saccharomyceta

 

Subdivision:

Pezizomycotina

  no rank:

leotiomyceta

  no rank:

sordariomyceta

 

Class:

Sordariomycetes

 

Subclass:

Sordariomycetidae

 

Order:

Diaporthales

 

Family:

Diaporthaceae

 
Synonyms

 

 
Common
Names

Phomopsis gall

 

 

 

 

 

 

Glossary

Gall

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

       
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Infestation

  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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