Duke is a selective turf herbicide that controls grass and broadleaf weeds. It is a Destiny herbicide alternative and contains iodosulfuron-methyl. Duke is a sulfonylurea herbicide and so is in FRAC Group 2. This group also contains the Monument herbicide alternative, called Recondo. This free herbicide resistance chart will help you with a resistance management strategy.

Duke herbicide works by inhibiting the acetolactate synthase (ALS) enzyme in susceptible plants. This is needed to produce certain amino acids. This inhibition disrupts the normal growth of weeds, leading to their death.

With excellent safety on couch and on kikuyu, this turf chemical gives great control of common turf weeds. This includes clover, bindii and ryegrass as well as superb (and unique) efficacy against onion weed and Guildford grass (onion grass).

Do NOT use on Qld Blue Couch.