Barley Thrips
Limothrips denticornis (Halliday)

Adults are dark brown to black and 1.2 to 1.8 mm long. Immatures are white. All forms differ from other thrips in having a tooth-like projection from the third antennal segment. Feeding on barley occurs under the top two leaf sheaths and causes the upper portion of the plant to turn white. Barley heads sometimes do not emerge properly from damaged plants.