An almond orchard that has been treated up to four times a year with glyphosate, for the past four years, is now exhibiting glyphosate resistant ryegrass. The 1 lb. ai or 1 quart per acre use rate has no visible effect. Some effects are noted with 3 lbs. AI of glyphosate, with considerable chlorosis and desiccation occurring at 5 lbs. AI per acre. It appears between 5 and 10 lbs. AI per acre is needed to completely control this population.