ST. PAUL  (AP) -- Minnesota is seeking more volunteers to help keep an eye out for new infestations of emerald ash borer and other invasive pests.

Dozens of citizens already have joined the effort. The Minnesota Department of Agriculture says these "first detectors" form part of the state's early warning system for invasive tree pests, making it more likely infestations will be found early when they're easiest to control.

Experts will offer six workshops statewide this month and next to teach tree care workers, community foresters and others the basics of how to tell destructive pests from harmless bugs.

MDA Plant Protection Director Geir Friisoe says many new infestations have been discovered by informed citizens who know what to look for and who to call when they find something.

(Copyright 2011 by The Associated Press.  All Rights Reserved.)