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Lepidopteran Worms

 
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Worm Identification and Control in Soybean

In-Depth Downloads

Key Worm Pests and Impact on Crop

Corn Earworm and Tobacco Budworm

  • Similar looking species, singly laid eggs.
Corn earworm adult and larvae
Tobacco budworm adult and larva

Soybean Looper

Soybean looper adult and larva

Velvetbean Caterpillar

Velvetbean caterpillar adult and larva

Beet Armyworm

  • Apply DuPont Prevathon insect control at first sign of significant larvae in or adjacent to field edges, or before the economic threshold is exceeded.
Beet armyworm adult and larva

Fall Armyworm

  • Apply DuPont Prevathon insect control at first sign of significant larvae in or adjacent to field edges, or before the economic threshold is exceeded.

Fall armyworm adult and larva

Green Cloverworm

Green cloverworm adult and larva

Cabbage Looper

Cabbage looper adult and larva

Southern Armyworm

Southern armyworm adult and larva

Distinguishing Armyworms and Earworms

True armyworm (AWM)

  • Smooth cuticle; subdued colors. DuPont Prevathon insect protection is not labeled for true armyworm.

Fall armyworm (FAW)

  • Brown/gray larva with distinct tubercles along body.
  • 3 thin, white stripes down the back.
  • Distinct white inverted “Y” on head (see image below).
  • Young larvae may be difficult to distinguish from corn earworm.

Corn earworm (CEW)

  • Bright, variable colors.
  • Cuticle has “unshaven” look.

True armyworm, fall armyworm and corn earworm

Credits

¹ Joseph Berger, Bugwood.org

² Whitney Cranshaw, Bugwood.org

³ J. Michael Moore, University of Georgia, Bugwood.org

4 Merle Shepard, Gerald R.Carner, and P.A.C Ooi, Insects and their Natural Enemies Associated with Vegetables and Soybean in Southeast Asia, Bugwood.org

6 Whitney Cranshaw, Colorado State University, Bugwood.org

6 Eddie McGriff, University of Georgia, Bugwood.org

All images credited above are used under a "Creative Commons Attribution 3.0 License".

A small change was made to these photos credited above: they were cropped to "zoom in" on the insect.


This article is not intended as a substitute for the product label for the product referenced herein. The product label contains important precautions, directions for use and product warranty and liability limitations that must be read before using the product. Applicators must be in possession of the product label at the time of application. Always read and follow all label directions and precautions for use when using any pesticide alone or in tank mix combinations.

The foregoing is provided for informational use only. Contact your authorized Pioneer sales professional for information and suggestions specific to your operation. Product responses are variable and subject to a variety of environmental, disease and pest pressures. Individual results may vary.

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