Insects Affecting Mountain Mahogany
Curl-leaf Mt Mahogany Leafminer
Coptodisca cercocarpella Braun
Cercocarpus Leaf-gall psyllid
Cacopsylla maculata (Crawford)
An Immature psyllid is pictured at right. They are present in newly formed leaf galls but leave them after a period of feeding. The adult psyllid is shown in the bottom picture. They molt from immature psyllids within the leaf galls, but then disperse are are not often seen. There appears to be two generations a year in western Colorado.
The impact of leaf galling psyllids on seed production is unknown. Very high level infestations probably will affect long term growth of the shrubs. There should be many natural enemies that keep psyllid populations in check, but occasional problems will probably occur. Control with insecticides will be difficult because immature psyllids are protected by the leaf galls.
This page was updated on April 26, 2014