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

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 Dutch Elm Disease (fungus) Small Beetle
Fireblight (Bacteria)
Pollinating Insects
Tomato Curly Top (virus)
Beet Leafhopper
Cucumber Mosaic (virus)
Aphids