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Forest Entomology

Forest Entomology. The study of Forest insects that feed on forest trees Most insects are not harmful to trees Forests changed drastically in the 1800s . Destroyed Timber. Other causes are weather, grazing animals, and air pollutants. 4 Types of Forest Insects. Borers

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Forest Entomology

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  1. Forest Entomology The study of Forest insects that feed on forest trees Most insects are not harmful to trees Forests changed drastically in the 1800s

  2. Destroyed Timber • Other causes are weather, grazing animals, and air pollutants

  3. 4 Types of Forest Insects • Borers • Tunnel in and feed on twigs, ranches, trunks, roots and logs • Leaf-Feeders • Eat Leaves • Plant-Sucking • Feed on sap of trees • Gall • Cause abnormal tissue growths on trees • Plant Benign Cancer

  4. Conk • Fruiting Body at the base of a tree • Grows out

  5. Metamorphosis • The stages an organism develops after birth/hatching • Insects are typically: • Egg  Larvae  Pupae  Adult

  6. Parthogenesis • Asexual Reproduction • No male is necessary to reproduce for at least part of the growing season • Common in Aphids

  7. Mites • Tiny Spiders • 8 legs • Usually at the rear of the insect • Typically plant-sucking or gall

  8. Molt • Shedding outer layer of skin • Part of an organisms life cycle • Common in cicadas

  9. Pheromone • Secreted or Excreted chemical hormone that triggers a social response to attract the same species

  10. Canker • Localized dead areas • Grows inside • Typically caused by a Fungus • Most are lethal although it may take years to kill the entire tree

  11. Forest Pathology The study of forest tree diseases for the purpose of preventing and controlling them Can be result of unfavorable weather factor (drought, flood, etc.) 4 types of diseases: Fungi, Bacteria, Virus, Parasitic Plants

  12. Fungi • Type of disease • Can attack all parts of a tree • Can cause cankers • Reproduce through spores • Lots of good types of fungi

  13. Spores • Single or small group of united cells • Produced by fruiting bodies (ex. mushrooms) • Used to Identify a plant disease • Like dark and moist locations

  14. Bacteria • Single Cell • Can be good • Typically stay on the surface of a tree and find a wound and enter • Can produce cankers or galls

  15. Virus • Not a plant or an animal • Cannot be seen • Cannot live outside the host • Do not feed on plant tissue • Slowly kills a tree, makes a tree loose it’s vigor

  16. Parasitic Plants • Flowering plants • Produce seeds normally • Have no chlorophyll • Sometimes don’t have roots • Takes host trees resources

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