Description

Product Name: Dithiopyr Activity: Herbicide (pyridine) CAS: *********8 Physical Property Melting Point: *5oC Log P (octanol-water): 4.*5 Water Solubility: 1.4mg/L (*0oC) Comments: Dithiopyr is safe to apply to most turfgrasses including: Creeping bentgrass (spring, preemergence use only), Kentucky bluegrass, tall fescue, creeping red fescue, perennial ryegrass, bermudagrass and zoysiagrass. Granular forms of dithiopyr effectively controls crabgrass, goosegrass and foxtails preemergence with a single spring application of 0.*8 lb ai/acre. The emulsifable formulation (1EC) of dithiopyr provides more consistent control when applied twice per season (0.*5 0.*5 lb ai/A). Dithiopyr also provides effective postemergence control of crabgrass. For postemergence control, dithiopyr should be applied to *- to *-leaf stage crabgrass at 0.*5 to 0.*8 lb ai/acre for granular formulations and at 0.5 lb ai/acre for the emulsifiable concentrate. Tillered crabgrass will not be effectively controlled, therefore dithiopyr 1EC (0.*8 lb ai/acre) should be tank-mixed with either Acclaim (0.*9 lb ai/acre) or MSMA (1.0 lb ai/acre) and applied prior to mid-June. After 1 July use either Acclaim, MSMA or DSMA alone. Reseeding should be delayed for 3 months following use.