PEST
 
   NAME
     Oak Leafminer
     Phyllonorycter messaniella
 
   ORDER
     Lepidoptera
 
   FAMILY
     Gracillariidae

Description of the Pest
The adult is a very small moth; the cream-coloured larvae are up to 5mm in length and have chewing mouth parts.

Appearance and Distribution of the Pest
This is an European native insect and is found commonly throughout Australia.

Life Cycle
This insect has a Holometabolous life cycle, ie. When metamorphosis is observed during the pupal stage.

Period of Activity
Most active in cool to mild temperate climates.

Damage Caused
Larvae burrow into the underside of leaves, where the eggs were laid, causing blistering, which appears on the upper surfaces as pale blotches. The damaged leaves become brown and papery, resulting in a burnt appearance and leaf loss.

Susceptible Plants
Favoured plants include oak, chestnut, beech, apples, liquidambar, stonefruit, and apples.

Cultural Control
Removal and destruction of fallen leaves is a preventative measure to reduce numbers in the subsequent season.

Biological Control
None known.

Chemical Control
During early infestations, when larvae are active, systemic pesticides may be effective.
Note
Always read the label for registration details and direction of use prior to application of any chemicals.