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Lab 9: Leaf miners, twig leaf and trunk feeders, borers (I)
Picture Sheet 3 of 7 |
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Adult twig girdler feeding on twig.( A long-horned beetle) Injury to the outside surface causes the damage. |
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Twig pruner injury. |
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Girdled twigs caused by twig girdler. Adult lays eggs in part of twig distal to cut. Twig falls and larva completes development. Adults emerge next summer. |
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Twig pruners are often flat-headed borers whose larvae tunnel in twig . Injury beneath the surface caused the damage. |
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Pales or northern pine weevil feeding on twig surface causes twig dieback. | ||
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