I am going "quackgrass killing" pre plant on some hay ground. I use 2 qt's/ac and 8 oz. of spreader sticker/acre, in 15 gal/water at 30 lbs. pressure. The glysofate is the 4 lb. generic material. If it was 4.5/5 pound material I'd be putting on 1.5-1.75 qts/ac. (following my Chemical Rep's recomendations) This is for my area/situation, your's is most likely different. just my 2 cents |