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Aphids
Identification tips: Bluish-green, can be winged or wingless; look for curled leaves and stunted plants, honeydew on leaves, or black sooty mold.
Use the key to identifying aphids. |
Armyworms
Identification tips: Black with a white or red stripe; eggs are covered with a gray, cottony material, found on weeds near field; look for holes in leaves and girdled branches. |
Corn leafminer
Identification tips: Pale-green to yellowish maggots; look for mines on lower leaves up to the sixth leaf. |
Corn leafhopper
Identification tips: Adults are very small, tan, and have two distinct black spots between eyes; nymphs are tan or green and wingless; both feed in whorls and on leaves; look for stunted corn, dry leaves, sticky honeydew, and black sooty mold. |
Cucumber beetles
Identification tips: Yellow with black spots or black with white stripes; larvae hatch in soil and feed on roots; adults feed on corn leaves, tassels, and silks. |
Grasshoppers
Identification tips: Nymphs feed on foliage, most often on the edges of fields near pasture areas or roadsides. |
Thrips
Identification tips: Adults are tiny and narrow with fringed wings; immature thrips are wingless and yellowish; look for stunted plants and distorted leaves. |
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Seed rots and damping off
Identification tips: Infected tissue may be water-soaked (Pythium), white to pink (Fusarium), or bluish (Penicillium); look for brown, soft stem and yellow, wilted leaves. |
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