1. Agronomy CDE Insect Identification

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3. Adult: ¼ inch long Brownish-grey with darker brown band down the back
Alfalfa Weevil
Adult: ¼ inch long Brownish-grey with darker brown band down the back

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5. Aphid
Adult: 1/10 inch long Commonly green & black; can be gray, brown, yellow, pink, red, or lavender. All species have 2 tubes (cornicles) on back ends of their bodies.

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7. Armyworm Larva
Mature Larva about 1 ½ inches Dark greenish-brown to black with pale white, orange & dark brown stripes down length of abdomen. Head capsule yellowish brown.

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9. Assassin Bug
Long narrow head; short beak (3-segmented); long slender antenna (4-segmented)

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11. Bean Leaf Beetle
Multiple Colors; Always has a black triangle behind its neck; Usually has 4 quadrangular black marks on its wing covers.

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13. Blister Beetle
Long (3/4 to 1 ¼ inch) narrow bodies; broad heads; antennae that are about 1/3 the length of entire body.

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15. Chinch Bug
Adult: 1/5 inch long; Black with white wings folded over its back; Slender beak

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17. Corn Earworm Larva
Vary in color; Head tends to be orange or light brown; Usually has a broad dark band laterally above the spiracles and light yellow to white band below the spiracles

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19. Corn Rootworm Larva
Soft white to pale yellow bodies; Always have dark to light brown head; Small ¼ to ½ inch long.

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21. Brown or black; hard exoskeleton, very long antennae
Cricket
Brown or black; hard exoskeleton, very long antennae

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23. Cutworm Larva
30 to 36 mm long; 6.5 mm wide; Dull gray or dull gray brown; Series of black trapezoidal markings on the posterior body segments.

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25. European Corn Borer Larva
Light brown or pinkish gray with brown to black head capsule and a yellowish brown thoracic plate; Round dark spots on each body segment.

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27. Flea Beetle
Somewhat elongate to oval in shape, vary in color, pattern and size; Habit of jumping like fleas when disturbed.

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29. Grain Weevil
3 – 4 mm long; Forewings hard & leathery, meeting along mid-line of dorsal surface; Biting mouthparts; Well-developed thorax

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31. Grasshopper
Color from green to brown with some darker markings; Big hind legs ; 2 pairs of wings with the hind wings being large; Antennae not very long; Conspicuous eyes

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33. Green Lacewing
Pale green; 12 – 22 mm long; Long antennae; Bright golden eyes; Large, transparent, pale green wings; Delicate body

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35. Honeybee
3 body parts – head, thorax, abdomen; Single pair of antennae; 4 wings; back legs have thin sacks called “pollen baskets”

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37. Japanese Beetle
3/8 to ½ inch long; metallic green to greenish-bronze with coppery red wings and small white tufts on the sides and tip of the abdomen.

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39. Lady Beetle Larva
About 1 cm long; Dark & alligator-like body; 3 pairs of prominent legs; yellow or orange bands or spots

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41. Leaf Skeletonizer
Grape Leaf Skeletonizer: Black w/yellowish or orange collar; ½ inch long:
Gum Leaf Skeletonizer: Dull grey-brown; Forewings darker grey markings while the hindwings are paler

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43. Leafhopper
Many Species of Leafhoppers; Range from 2 – 30 mm long; Pale green to gray or brown; Somewhat wedge-shaped bodies

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45. Mexican Bean Beetle
6-7 mm long; Oval in outline; 8 black spots on each wing cover; Cream-yellow to orange-brown with a bronze tinge

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47. Scale
Vary from 1/16 to 1/8 inch long; Can be almost any color; secrete a waxy covering over their bodies, scale lives under this covering.

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49. Spider Mites
Very Small <1/60 inch; Oval shaped; Yellowish/greenish with 2 dark spots on its back.

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51. Spittlebug
1/3 inch long; Red-eyes; Dark brown to black; Wings held roof-like over the back in an inverted “V.”

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53. Spotted Cucumber Beetle/ Southern Corn Rootworm Beetle
¼ inch long; Yellow - green with a black head; 12 black spots on its wing covers

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55. Stinkbug
¼ to ½ inch long; Flattened, shield-shaped body; Green, brown, black, some brightly colored; Hard upper covering

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57. Tobacco/Tomato Hornworm Larva
Can be up to 4 inches long; Generally green with 7 diagonal white lines on the sides; “Horn” located dorsally on the terminal abdominal segment that is usually red or black.

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59. Western Corn Rootworm Beetle
1/6 to ¼ inch long; Yellow in color with 3 black stripes running down the length of the wing covers, males may be black with a narrow yellow margins & yellow tips.

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61. White Grub
½ inch long; C-shaped; Thick bodied, creamy-white with a brown head capsule; short legs

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63. Wireworm
Up to ½ inch long; Dark brown to yellowish-orange; stiff-bodied; Darker head; Behind head are 3 pairs of legs.

64. References University of Illinois – ipm.uiuc.edu
Penn State University – ento.psu.edu
Texas A & M University – vegipm.tamu.edu
University of Florida – creatures.ifas.ufl.edu
University of Nebraska Lincoln – ianrpubs.unl.edu
Iowa State University – ent.iastate.edu
University of Kentucky – ca.uky.edu
Ohio State University – ohioline.osu.edu
Kansas State University – oznet.k-state.edu
Cornell University – nysaes.cornell.edu
University of California – ipm.ucdavis.edu