Diseases of  Alfalfa  Corn  Soybeans  Wheat

Insect Pests of  Alfalfa  Corn  Soybeans  Wheat

Weeds  Identify  Monocots  Dicots  Grasses  Sedges  Lilies  Broadleaf

Scout Info
Kentucky IPM Pest Information Pages

Grasshoppers : Kentucky Soybean IPM



Several species of grasshoppers are present in Kentucky soybean fields and feed on soybean foliage. All have enlarged "jumping" legs. Mature hoppers will have wings. Some species never grow larger than 1/4 to 3/4 inch. It is these small species that usually cause the most damage.



Grasshoppers are mainly foliage feeders. Feeding will appear as very ragged holes beginning first on leaf margins. Under severe cases, petioles and stem will be eaten. Grasshoppers may also feed on soybean pods, especially during dry years. Drought conditions that reduce natural vegetation will force grasshoppers to move into cultivated fields.

IPM Techniques and Scouting

Grasshopper Activity

Grasshopper pest activity

Please note: These dates are approximations only. This calendar was constructed using data from Kentucky, USA. These dates may not apply in your area. You may wish to contact your county extension agent or agricultural consultant for information tailored to your locality.

References and Additional Information

  • EntFact-116 - Three Common KY Grasshoppers and Their Natural Enemies

  • IPM-3 Kentucky IPM Manual for Soybeans

  • ENT-13 Insecticide Recommendations for Soybeans 1998, University of Kentucky Entomology Extension Publication ENT-13, Lexington, KY, 1998

  • Illinois Field Crop Scouting Manual

  • Purdue University - Field Crops Pest Management Manual

  • Handbook of Soybean Insect Pests by Leon G. Higley and David J. Boethel, Entomological Society of America

This site was created and is maintained by Pat Dillon, Department of Entomology, University of Kentucky, S-225 Agricultural Science Ctr North, Lexington, KY USA  40546-0091 (phone: 859/257-3571). Please send questions or suggestions to: pdillon@uky.edu