Wild Proso Millet Control in Sweet Corn (1986)

Report to the Oregon Processed Vegetable Commission

K.Peterson, R. McReynolds, R. William, and Bill Braunworth
OSU Dept of Horticulture

Wild proso millet infests about 4,000 acres in the Willamette Valley. This represents an approximate doubling of infested acreage from 1985. Currently registered herbicides for sweet corn provide erractic results. Research evidence suggests that leaching conditions may reduce the concentration of certain herbicides at the soil surface where the growing point of wild proso millet develops. Additionally, wild proso millet resists soil-applied applications of atrazine. Efficacy data are required to verify the results obtained last year involving 3 trials where tridiphane provided acceptable control of millet when combined with atrazine between late preemergence and early postemergence (before 3-leaf stage).