The capacity of methiocarb [as Mesurol, which includes 3,5-dimethyl- 4(methylthio) phenol methylcarbamate] as a bird repellent on a yellow endosperm grain sorghum (Sorghum bicolor (L.) Moench) hybrid, DeKalb C-42y, was evaluated. Methiocarb was applied to the grain heads from July 8 to August 5 at frequencies of 1, 2, 3, and 4 weeks and at rates of 2 and 4 kg/ha. After the grain was harvested, germination percentages were determined on all treatments during a 3-week period. A separate treatment, labeled external control, WoRo (e), was planted 15 m distant from the main experiment and was compared to the internal control of the main plot, WoRo (i). No statistical differences were observed among treatments in terms of total grain yield, threshing percentage, and the other characters when the control plot WoRo (i) was compared with the remaining treatments. Birds caused considerably more damage on the external than on interior plots in weight of 25 heads and threshing percentage. The germination percentage of seed treated with methiocarb was statistically superior to that of the untreated seed.