Minnesota Pesticide Applicators Certification Classes – Study Guide and Training Overview

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Minnesota Pesticide Applicators
Certification Class C Insect Identification




QUESTION
Wireworm


Answer:
Yellowish or Reddish Brown. Hard Shelled, and wire-like. Attack Seed or drill into base of stem
below ground. Kills meristematic tissue.




QUESTION
Seedcorn Maggots


Answer:
Problem in high organic content fields. Likely with Manure. White legless maggot tapered
toward head.

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QUESTION
White Grubs




Answer:
C shaped, white, brown head. One inch long. Chew on roots and root hairs.




QUESTION
Grape Colaspis


Answer:
Small Grubs 1/8 to 1/6 inches long. Comma shaped. Plump white body with tan head capsule.




QUESTION
Black Cutworms


Answer:
Vary in color from light-gray to black. Are 1 1/2 inches fully grown. Have somewhat greasy
apperance.

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QUESTION
Western Corn Rootworm


Answer:
Yellowish-tan. Three distinct stripes on back in black. 1/4 inches long. Major corn pest in the
United States.




QUESTION
Northern Corn Rootworm


Answer:
No distinct markings. Newly emerged are cream/tan in color. turn green with age. 1/4 inches
long.




QUESTION
Southern Corn Rootworm

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Answer:
Considered minor pest in the midwest.




QUESTION
Corn Leaf Aphid


Answer:
Small, blue green, soft bodied insects. Infestations originate from winged aphids carried in in
June.




QUESTION
European Corn Borer


Answer:
Cream to Flesh colored with small raised dark spots and a dark brown head. 3/4 to 1 inch long.
Former major pest.




QUESTION