Wingspan of 16-20. Forewings are white with 12-16 black dots arranged in 3 irregular rows. A white fringe is present on the outer margin of the forewings. The hindwings are ash grey with a long fringe.
Larvae
Young larvae are pale yellow with a dark head, prothoracic plate and thoracic legs. Mature larvae reach 13-16 mm in length and vary from yellow to grey-blue. Each abdominal segment bears 2 black spots and the head is black.
Eggs
Flattened and initially yellow in colour, becoming darker with age. Laid in row like batches covered in a coating on leaves.
Distribution
Europe the Middle East and parts of Asia.
Economic Host(s)
Apple (Malus) and sometimes pear (Pyrus).
Symptons/Signs
Young larvae mine leaves producing orange-brown blotches. They often feed gregariously within the growing mines. Mature larvae leave the mines to feed within the protection of communal silken webs.
Generations
1
Monitoring
Adults Present
July to September (climate dependant)
Recommended Trap Density
2 traps per hectare in large uniform orchards or 3-4 traps per hectare in mixed or less dense orchards.
Trap Maintenance
Check traps on a regular basis; at least twice a week. Replace the pheromone dispensers every 4 weeks to achieve optimum results.
Replace sticky inserts once they become saturated with dust or insects.
Storage
Keep product away from heat and direct sunlight. Store in a refrigerator for a shelf life of 18 months or a freezer for an extended life of 24 months. Always store sealed in
original packaging.
