Hectra is a post emergence broad spectrum herbicide that belongs to the chemical group of sulfonylurea compound. Halosulfuron Methyl 75% WG has excellent foliar application efficacy against Cyperus rotundus. It is taken up through the room and shoots via the xylem and downwards via the phloem. It accumulates in the plant and inhibits the enzyme aceto-lactate synthate (ALS), which is responsible for purchasing essential amino acids. The affected weeds cannot, therefore maintain proteins for new cells. The whole process a driven by the plant’s use of water (transpiration).