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5 Entomology   Symptoms
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5 Entomology Symptoms

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  • 1. Entomology – Symptoms
  • 2. Chewing
    • Chew off external parts of a plant
    • Grind them up
    • Swallow solids and liquid parts together
    • Grazing
  • 3. Chewing
    • Cabbageworms
    • Armyworms
    • Grasshoppers
    • Colorado potato beetle
    • Pear slug (sawfly)
    • cankerworm
    Pear Sawfly
  • 4. Cabbageworm Artogeia rapae                                   
  • 5. Army Cutworm Euxoa auxiliaris
  • 6. Clearwing Grasshopper
  • 7. Pear Slug Caliroa crasei
  • 8. Piercing-Sucking
    • Piercing the epidermis and sucking out the sap from the cells within
    • Internal and liquid portions of the plant are swallowed
    • Insects remains on the plant
  • 9. Piercing-Sucking
    • Have an extremely slender and sharp pointed portion of the beak
    • Thrust into the plant
    • Sap is sucked
  • 10. Piercing –Sucking effect
    • Minute spotting or white, brown or red
      • Leaves
      • Fruit
      • Twigs
    • Curling of the leaves
    • Deformed fruit
    • Wilting, browning and dying
  • 11. Piercing - Sucking
    • Aphids,
    • Scale insects
    • Leafhoppers
    • Squash bug
    • Plant bug
  • 12. Aphids
  • 13. Aphid Curling & Distortion                                                                                                             
  • 14. Aphids on Geranium
  • 15. Brown Scale & Honeydew Coccus hesperidum
  • 16. Leafhopper
  • 17. Potato leafhopper damage
  • 18. Squash Bug
  • 19. Internal Feeders
    • Feed within the plant tissues a part of all of their destructive stages
    • Gain entrance by having eggs deposited into the tissues
    • Eating their way in once the eggs hatch
    • Hole is very minute (invisable)
    • Large hole indicates the exit of the insect
  • 20. Internal Feeders
    • Borers
    • Worms
    • Leaf miners
    • Gall insects
  • 21. Ash Borer
  • 22. Leaf Miners
    • Small enough to feed between the upper and lower epidermis of a leaf
  • 23. Gall insects
    • Sting the plant which then grows a home for them
    • Insects find shelter and food inside the gall
    • Development from the secretions of the larvae
    • Different insects on same plant make different structured galls
  • 24. Cooley Spruce Gall
  • 25. Chokecherry Midge in Gall
  • 26. Subterranean Insects
    • Attack roots and underground stems
  • 27. Subterranean Insects
    • Chewers
    • Sap Suckers
    • Root borers
    • Gall insects
    • Woolly apple aphid
    • Wireworms
    • Root maggots
    • Billbugs
  • 28. Laying eggs
    • Puncture tissue as a place to lay eggs
    • Cicada places eggs in 1 year twigs – splitting the wood
    Buffalo Tree Hopper
  • 29. Use of Plants for Making Nest
    • Leaf-cutter bees
      • Take a semicircular piece of rose and other foliage
      • Cemented together to form thimble-shaped cells
      • In a tunnel made in the stem of a plant
  • 30.  
  • 31. Carry other insects to the plant and establishing them there
  • 32. Insects Vector Pathogens
    • Feed, lay eggs, or bore into plants Making an entrance point for disease
    • Move pathogen on their bodies from one plant to a susceptible surface of another plant
    • Carry pathogens on the outside or inside of their bodies and inject them as they feed
  • 33. Insects Vector Pathogens
    • Pathogens can spend time in the bodies of insects, can overwinter their
    • Insects act as a host for a pathogen
  • 34. Vectored Pathogens Aphids Cucumber Mosaic (virus) Beet Leafhopper Tomato Curly Top (virus) Pollinating Insects Fireblight (Bacteria) Small Beetle Dutch Elm Disease (fungus)
  • 35.