15-19 mm wingspan. Forewings are black with distinctive yellow, orange and silvery-blue markings. Ocellus conspicuous with alternating black & yellow bands. Hindwings dark grey-brown with white fringe.
Larvae
Final instars are 8-11 mm in length. Abdomen whitishgrey to pinkish with pinacula a dark grey colour. Head and prothoracic plate are brown.
Eggs
Laid in small clusters on tree bark.
Distribution
Europe, much of Asia, North Africa and North America.
Economic Host(s)
Cherry, plum, peach (Prunus), apple (Malus) and pear (pyrus)
Symptons/Signs
Following eclosion, larvae bore into the bark to feed below the surface. Tunnels become filled with frass and webbing. Tree sap occasionally exudes from tunnelling sites.
Generations
2
Monitoring
Adults Present
Typically April to June and August to October
Recommended Trap Density
2 traps per hectare in large uniform orchards and 3-4 traps per hectare in mixed and less dense tree crops.
Trap Maintenance
Check traps on a regular basis; at least twice a week. It is recommended to replace the pheromone dispensers every 4 weeks to achieve optimum results.
Replace sticky inserts, if used, when they become filled 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.
