1. Home
  2. Field guide
  3. Pests
  4. Grasshopper
differential grasshopper MER copy.jpg

Grasshopper

Description

  • Adult: Yellowish brown or gray with wings and unique chevronlike black marks on the back legs. Can grow to 1¾" long.
  • Nymphs: Resemble the adults but lack wings.
  • Eggs: Brown to orange, elongated and found glued together in masses about 1" to 2" below the surface in uncultivated soil.
     

Timing of damage: V8 to R6

Type of damage: Leaves will be chewed away from the outer edges inward. Fresh silks will also be eaten.

Scouting: Estimate the level of damage and number of grasshoppers per square yard in five locations. Damage is typically greatest along field borders, but move beyond borders when scouting.

Economic threshold: In field borders, eight or more grasshoppers or 15 or more nymphs per square yard; within the field, three or more grasshoppers per square yard.

Crop
Corn
Age
Adult
Timing of damage
V7-V10
V11-VT
R1-R2
R3-R4
R5-R6
Insect color
Gray
Brown
Orange or Yellow
Insect markings
Triangular marks
Insect type
Other
Insect length
1/2" to 1"
1" to 1-1/2"
1-1/2" to 2"
Type of damage to crop
Leaf feeding
Silk feeding or clipping
Similar Pests

Ask an Agronomist

The material and content contained in the Greenbook label database is for general use information only. Agworld and Greenbook do not provide any guarantee or assurance that the information obtained through this service is accurate, current or correct, and are therefore not liable for any loss resulting, directly or indirectly, from reliance upon this service. This label database does not replace the official manufacture issued label. Users of this database must read and follow the actual product label affixed to the container before use of the product.