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Notable early examples of live plant harbored pests—such as beech scale, chestnut blight, and white pine blister rust—led to the Plant Quarantine Act of 1912 and regulations from the US Department of Agriculture in 1919. Despite these and subsequent regulations, insects and pathogens have continued to be introduced through live plants. [1]
Both the adults and larvae feed on the emergent leaves of the elm. Repeated heavy infestation rarely kills the tree outright, but weakens it, rendering it vulnerable to disease. Falling branches encourage elm bark beetles (Scolytus multistriatus and S. schevyrewi) to proliferate; the beetles are vectors of Dutch elm disease. [4]
Elm bark beetle trap on an elm tree. Hylurgopinus rufipes, known as the native elm bark beetle, is a species of elm bark beetles in the tribe Hylesinini (crenulate bark beetles). It is found in Canada and the United States. It is of particular importance as a vector of Dutch elm disease.
May 17—New Mexico has had many invaders over the centuries, large, medium and small. The latest is in the latter group: It's a dark, half-inch-long insect with red markings on its belly, known ...
Dutch elm disease (DED) is caused by a member of the sac fungi (Ascomycota) affecting elm trees, and is spread by elm bark beetles. Believed to be originally native to Asia , the disease was accidentally introduced into America , Europe , and New Zealand .
One of the easiest ways to remove beetles from small plants is to inspect the plants early in the morning (about 7 a.m.) when temperatures are lower and the beetles are sluggish. Timing is ...
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