Maple leafblotch miner

Maple leafblotch miner - Dorsal view of a larva in its mine
  • Latin name: Cameraria aceriella (Clemens)
  • French name: Mineuse de l'érable
  • Order: Lepidoptera
  • Family: Gracillariidae
  • Synonym(s): Lithocolletis aceriella Clemens
Description

Distribution

Eastern Canada

Micro-habitat(s)

Leaf

Damage, symptoms and biology

Damage on leaf surfaces is sufficient evidence of the maple leafminer's presence. The larvae mine into the parenchyma, just under the upper surface of the leaf. At the end of summer, the damage becomes more obvious because the caterpillars wrap silk around part of their mines so they can change to pupae the following spring.

Part of the population overwinters in the larval form inside leaves that have fallen to the ground and pupates the following spring. The other part overwinters as pupae.

Life cycle (East of the Rockies)

Life cycle (East of the Rockies)
Stage/Month J F M A M J J A S O N D
Larva
 
 
Pupa
 
 
Egg
 
Adult
 

Other information

Local infestations of the maple leafminer occur occasionally. The species does not cause serious damage to trees, although it adversely affects the aesthetics of ornamental trees.

This insect can be controlled by gathering and burning the dead leaves that fall during autumn.

Canadian Forest Service Publications

Maple leafblotch miner

Diet and feeding behaviour

  • Phyllophagous : Feeds on the leaves of plants.
    • Miner: Feeds inside the blade of a leaf, between the epidermal layers, or beneath the bark of plants, by first excavating a mine into these tissues.
Information on host(s)

Main host(s)

Mountain maple, red maple, sugar maple

Photos
  • Maple leafblotch miner Dorsal view of a larva in its mine
  • Maple leafblotch miner Appearance of an old mine on a sugar maple leaf
  • Maple leafblotch miner Adult (wingspan: 7-9 mm)
  • Maple leafblotch miner Circular case built by a full-grown larva
  • Maple leafblotch miner Larvae and their damage on a sugar maple leaf
  • Maple leafblotch miner Mines on a sugar maple leaf
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