Terbutryn

N-(1,1-dimethylethyl)-N'ethyl-6-(methylthio)-=1,3,5-triazine-2,4-diamine

In water (22 °C ). In acetone 220,hexane 9,n-octanol 130, methanol 220, toluene 45 (all in g/l, 20 °C ). Also readily soluble in dioxane, diethyl ether, xylene, chloroform, carbon tetrachloride, dimethylformamide. Slightly soluble in petroleum ether.

Terbutryn is a selective herbicide, absorbed by the roots and foliage, with translocation acropetally through the xylem, and accumulation in the apical meristems.

Used pre-emergence in winter cereals at 1-2 kg a. i. / ha to control blackgrass and annual meadow grass. Among the autumn-germinating broad-leaved weeds controlled are chickweed, mayweed, poppies and speedwell, but cleavers are rather resistant. Other pr-emergence uses are on sugar cane and sunflowers, and , in mixture with terbuthylazine, on beans, peas and potatoes. In mixture with metolachlor, used in cotton and peanuts. Also used post-emergence. (0.2-0.4 kg/ha) in cereals, (1-3 kg/ha) in sugar cane, and as a directed spray in waterways, reservoirs and fish ponds.