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Tentiform Leafminer
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Tentiform leafminer mines in apple leaf caused by tissue-feeder larval stage |
Tentiform leafminer mines in apple leaf caused by sap-feeder larval stage |
Life Cycle: Overwinter as pupae. Up to three overlapping larval generations per year (May, late June-July, mid-August) depending on weather conditions.
Monitoring: Inspect undersides of leaves for sap-feeder larval blotch mines and upper surfaces of leaves for tissue-feeder larval tent-shaped mines; examine tent-shaped mines for leafminer and parasite larvae and pupae.
Hosts: Apple, cherry, pear.
Comments: Adult leafminers are small moths with golden bronze-coloured wings with white streaks oulined with black. They are active during the day. Young larvae (sap-feeders) are white with a flattened body and wedge-shaped brown head. Older larvae are yellow with a typical caterpillar-shaped body. Pupae are light to dark brown in colour and are often found protruding from the tentiform mine from which adult moths emerge. Attractant traps are available for monitoring male moths.
Body length: Adult - 3.0-5.0mm; Mature larva - 4.2mm
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