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New type of beetle killing trees in North Carolina

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RALEIGH, NC (AP) -- A new type of Asian ambrosia beetles has
arrived in North Carolina and the insects pose a threat, especially
for tree nurseries.

Most beetles thrive on dead wood, but some ambrosia beetles
attack living trees. Entomologists say the ambrosia beetles bore
into a tree, planting a deadly fungus. They eat the fungus, as it
destroys the tree by taking needed nutrients.

The News & Observer of Raleigh reports Monday that redbay
ambrosia beetles were found for the first time in North Carolina in
Bladen County in April. Redbay ambrosia beetles have ravaged
avocado orchards in Florida.

Another type of beetle, the granulate ambrosia beetle, has been
the state for decades. The granulate ambrosia beetles attack peach,
plum, pecan, dogwood, Japanese maple trees and crape myrtles.

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

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What are the visual

What are the visual tell-tale signs? I have lost at least three mature dogwoods. The leaves just started to dry-up gradually until the whole tree was affected.