Modification of a Commercial Attraction Trap for Live Trapping of Monochamus alternatus(Hope) Adults(Coleoptera;Cerambycidae).

A trap for capturing Monochamus alternatus adults alive was devised by adding a plastic funnel to a commercial attraction trap. The funnel was set in a bucket to prevent collected adults from escaping. About 30% of collected beetles escaped from buckets with funnels per day on average under experimental conditions. Twenty-one traps were set in pine stands and captured beetles were collected every 3-4 days. The escape ratio during each census period was estimated at 34-56%, corresponding well to the value estimated from the laboratory experiment. On sunny summer days, the temperature in the buckets reached 45-49°C, which seemed to be lethal to the beetles. The maximum temperature in buckets covered with aluminum foil was about 6°C lower than in the uncovered bucket, but was still too hot to keep captured beetles alive.