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Elm Bark Beetle

April 28, 1999
Adult elm bark beetles started appearing in pheromone traps at The Morton Arboretum on April 21. Remember, this is the insect that spreads Dutch elm disease. They are dark brown, only about 1/8 inch long, and they breed in dead or dying elm trees that still have bark attached. There are several generations each year so adults emerge at various times throughout the growing season. Although insecticide sprays can be used to control this insect, we recommend controlling Dutch elm disease through pruning out dead and dying branches and promptly removing dead trees. (The Morton Arboretum and Phil Nixon)
Author: Phil Nixon staff at The Morton Arboretum


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