Five herbicides were evaluated for the control of littleseed canarygrass. These herbicides were applied at either the 1-3 leaf stage of the canarygrass or at the 1 leaf to elongating stage of development. All of the herbicides tested except Hoelon, produced excellent control at the early application. Puma, Olympus and the highest rate of F130060 (Aventis) produced good control at the late application. Achieve worked well when applied early but was unacceptable at the late application.

Bacterial blight of barley, caused by the bacterium Xanthomonas translucens, occurs sporadically in Arizona in sprinkler-irrigated barley. The pathogen is seed borne, and there are no resistant varieties of barley. Bacterial blight has been severe when contaminated seed is planted and favorable weather conditions, including spring rains and late frosts, occur in March and April. Methods for detection of the bacteria on seed have been established at The University of Arizona using both standard pathogenicity trials on barley seedlings and immunoassay techniques.