EUROPEAN/FRUIT TREE LEAFROLLER

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Title: EUROPEAN/FRUIT TREE LEAFROLLER
Description: LATIN NAME: Archips rosanus (Linnaeus) Archips argyrospila (Walker) LIFE CYCLE: Overwinter as eggs on host tree. Larvae present late March to early June. Moths present June to July, laying overwintering egg masses. One generation per year. MONITORING: Inspect branches for egg masses and monitor for egg hatch. From tight cluster on, inspect leaf and blossom clusters for larvae. They may be found in rolled leaves. Limb taps will indicate larval presence but not abundance. HOSTS: Fruit trees, locust, box elder. COMMENTS: Newly hatched and young larvae are usually yellow to dirty yellow in colour, gradually turning green as they mature. They all have a shiny brown or black head and segment behind the head. Larvae will wriggle backwards and drop from leaves on a silk thread when disturbed. They can be distinguished from two-generation leafrollers by their smaller size early in the spring. BODY LENGTH: Adult - 13.0 mm; Mature larva - 16.0 mm.