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Leafminer damage

FAST FACTS - LEAFMINERS
by Nanette Londeree, Master Rosarian

SIGNS

  • Larvae dropping from foliage on silken threads
  • Small flies, moths or wasps near plants

    Leafminer Damage SYMPTOMS

  • Meandering-looking trails on canes
  • Off-color patches, sinuous trails, or holes in leaves
  • Portions of a leaf or patches of foliage that turn yellow or brown and die back

    CAUSE

  • Larvae of several families of small moths
  • Larvae of leaf mining flies, sawflies, and wasps

    OPTIMAL CONDITIONS

  • Healthy thin-barked plants
  • Varied conditions and habitats depending on the type of insect miner

    TREATMENT

    Prevention:

  • Keep plants vigorous with proper care and irrigation

    Elimination:

  • Elimination is not necessary
  • Prune out and dispose of foliage infested with larvae

    GOOD GUY / BAD GUY?

  • This guy is just a nuisance and doesn’t usually cause significant damage


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    Last Modified: 08/06/2013