Small grain-Grass bug

Includes

Black grass bug (Labops hesperius)
Pacific grass bug (Irbisia pacifica)

Pest description and crop damage This true bug is grayish black, about 0.25 inch long, and somewhat pear-shaped. Feeding causes pale spots on the leaves of cereals and, when severe, gives leaves a general yellowish, stippled appearance.

Infestations of this insect occasionally occur in volunteer grain or grain growing under poor soil or moisture conditions. It has not been a common problem in grain-growing areas.

Management-chemical control

Foliar sprays

  • pyrethrin-There are several pesticides containing various amounts of pyrethrins. Check each label for the use and amount needed. Some formulations are OMRI-listed for organic use.
  • zeta-cypermethrin (Mustang) at 0.022 to 0.05 lb ai/A. PHI 14 days for grain, forage, and hay. REI 12 hr. Retreatment interval 14 days. Do not exceed 0.25 lb ai/A (0.125 lb ai/A for MustangMaxx) per year. Wheat and barley.