FOREST PESTS AND DISEASES

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Across
  1. 4. Insect that draw the plant juices from trees, using their hollow, straw-like mouth parts.
  2. 7. A way to control insect populations and disease outbreaks.
  3. 8. Insect that eats all of the leaf except the veins.
  4. 9. The study of tree diseases.
  5. 10. A species that occurs naturally in a particular place without human intervention.
  6. 14. An insect which uses skeletonation to kill birch trees.
  7. 15. A tree wound caused by blight.
  8. 16. The study of forest insects.
  9. 17. A symptom of tree disease which blocks the nutrients from reaching the leavs.
Down
  1. 1. A non-native species that have been transported to a new area for their value.
  2. 2. An insect which uses sapsucking to kill hemlock trees.
  3. 3. Insect that feeds on the cambium and inner bark of a tree.
  4. 5. Insect that eats the tree's leaves or needles.
  5. 6. An insect which kills trees by sapsucking.
  6. 8. An insect which uses defoliation to kill oak trees.
  7. 11. An insect which uses barkboring to kill ash, maple, birch and tulip trees.
  8. 12. An insect which kills trees using bark boring.
  9. 13. A species that is not native to an area and causes harm to humans, the environment or the economy.