Inspection moths

INSPECTION AND DAMAGE THRESHOLD. The flight of the moths of the various tortrix species can be determined with pheromone traps. These traps do not provide any clues as to the possible extent of damage, however. Tortrix moths that feed on fruit are highly polyphagous and can also live outside the orchard. Pheromone traps can only be used to determine the species composition of the tortrix population. 

INSPECTION AND DAMAGE THRESHOLD. Winter moth Caterpillars are detected by visual inspection, with 100 blossom clusters being examined. The damage threshold is 10-15% of blossom clusters infested. 

Codling moths often produce several generations per growing season, trapping the pupat-ing caterpillars aids control. Remove loose bark and wrap the trunk with a band of corrugated cardboard or burlap. Periodically remove the band and destroy pupae. Also inspect harvest containers for pupae. 

Throughout the apple and pear orchards of Canada and northwestern U. S., only a few major pests need be contained population monitoring and control are especially promising. Monitoring, combined with visual inspection for the codling moth, Laspeyresia pomonella, is successfully... 

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