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 Figure 1-7. Types of insect damage most likely in a building. (Upper
left.) Termite attack; feeding galleries often parallel to the grain and con-
taining excrement and soil. (Upper right.) Powder-post beetle attack;
emergence holes. prevalently filled with wood flour and not associated with
discolored wood. (Lower left.) Carpenter ant attack; nesting galleries
usually cutting across the grain and free of residue. (Lower right.) Beetle
attack: feeding galleries (made in the wood while green) free of residue and
the surrounding wood darkly stained.
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