Obliquebanded Leafroller, Choristoneura Roseceana Pheromone Lure

Description

The obliquebanded leafroller is a major direct pest of apple in Ontario, due to its developing resistance to organophosphate insecticides in most commercial orchards. This leafroller has an extremely wide host range and feeds on all species of fruit trees, hardwoods (e.g. maple, hawthorn, and crab apple), grey dogwood, and brambles (e.g. raspberry and blackberry).

Pheromone traps can be used to monitor adult activity and will help determine the proper timing of insecticide applications. The pheromone trap consists of a lure and diamond trap. These are ordered separately.

Features:

Pest:
The adult moth is variably coloured, light tan to dark brown, with darker bands on the forewings. Females are larger and generally darker than the males. The wingspan of the males ranges from 16 to 22 mm, and the females from 24 to 30 mm. Females are poor fliers, and both sexes are most active at dusk.

Timing and Rate:
After petal fall, four pheromone traps are hung in each 10 hectare block at a distance of 30 meters between traps along an orchard row. Place in easily accessible areas in ideally in orchard blocks with historically high injury problems. Fasten traps to limbs at eye level where air flow is good. Check traps twice a week and record all moth catches.