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Lab
10: Borers
(continued and agents of disease and rapid decline)(II.) Picture Sheet 2 of 4 |
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Peeling back the bark of an infested birch tree reveals the zig-zag pattern of bronze birch borer larval tunneling. Note how the larvae pack their frass. |  |
Larva of a bronze birch borer. Find the head (left). Note the enlarged thoracic segment. Tunnels left by this lava are oval or flattend in shape. |
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Adult bronze birch borer emerging from birch log. Note the flattened bottom portion of the exit hole gives it a "D" shaped appearance. |  |
Flat headed apple tree borer attacked this Bradford pear in the nursery. High winds snapped the tree where borers were tunnelling. |
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Adult bronze birch borer. Note the metallic sheen on the adult beetle. It is in a group of insects called the metallic wood boring beetles. Lavae of this group ar called "flat headed borers.
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Adult flat headed apple tree borer with wings spread. ( a metallic wood boring beetle) |
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