maple bladdergall mite

(Vasates quadripedes)

               
Conservation Status

IUCN Red List

not listed

maple bladdergall mite

NatureServe

not listed

Minnesota

not listed

Occurrence

Unsightly but not harmful to humans or host trees

Season

Several generations each year. The first galls develop late spring.

Hosts

silver maple (Acer saccharinum)

red maple (Acer rubrum var. rubrum)

sugar maple (Acer saccharum)

Size

Microscopic, about 1 125

 

Identification

This mite is about 1 500 to 1 125 long and invisible to the naked eye. It is most easily identified by the shape of the gall it produces and the plant species on which it is found. This mite is found exclusively on silver maple, red maple, and sugar maple.

The pouch-type galls first appear on the upper side of a leaf in late spring. They are solitary, though there are usually many galls on a single leaf. They are hollow and globe-shaped with a hairy opening on the underside of the leaf. They vary in size but may be up to 1 10 in height. They are green when they first appear, turning pinkish or red, and then finally black.

 
Similar
Species

This is the only mite that causes bladder galls on these host species. It is not found on other plant species.


Life Cycle

The adult overwinters in a crevice of the trunk or a branch. As leaf buds begin to swell in the spring the female emerges and begins feeding on a leaf bud. This causes the leaf to produce excess cells that rises above the leaf surface like a blister. The female then enters the hollow gall and deposits eggs. When the eggs hatch the young feed on the interior of the gall. In the summer the gall dries out. In fall the gall opens on the underside of the leaf. The adult emerges and searches for a site to overwinter.

 
Behavior

 


Distribution Distribution Map   Sources: 7.

Comments

Damage
The galls are unsightly but the tree is otherwise undamaged.


Taxonomy

Order:

Trombidiformes

 

Suborder:

Prostigmata

 

No Rank:

Eupodina

 

Superfamily:

Eriophyoidea

 

Family:

Eriophyidae (gall mites)

 

Subfamily:

Phyllocoptinae

 

Tribe:

Phyllocoptini

 
Synonyms

 

 
Common
Names

maple bladder gall mite

maple bladdergall mite

maple gall mite


 

 

 

 

 

 

 

 

       

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Leaf with Bladder Galls

  maple bladdergall mite   maple bladdergall mite
       
  maple bladdergall mite   maple bladdergall mite
       

Bladder Galls

  maple bladdergall mite   maple bladdergall mite
       
       

 

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  Bladdergall Mite (Eriophyidae) Damage to Maple Leaf
Carl Barrentine
 
   
 
About

Uploaded on May 19, 2010

Photographed at Rydell NWR, Minnesota (18 May 2010).

 
     
  Maple Gall Bladder and Mulberries
shootsandvines
 
   
 
About

Uploaded on May 6, 2010

Our maple tree has developed maple gall bladder. Mulberries on the tree. We have three trees. I'll be freezing this year and hopefully making some homemade wine.

 
     

 

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