Sempra is used for the selective post-emergence control of nutgrass and Mullumbimby couch in lawn. Nutgrass is a rapidly spreading grass like sedge that can quickly establish itself in your home lawn. Being a perennial, it will continue to flourish for years until removed.
Nutgrass has a rhizomatous root system and a very shiny leaf that resists chemical penetration. For this reason, it is recommended that you use a good quality wetting agent (surfactant) mixed with your chemical, such as Aqua Force or Moist.
When to Use: Completely eradicating the weed before it seeds and improving the general health and coverage of your lawn will help you to control weeds in your lawn. All weeds are easier to kill when they are healthy with more surface area to suck up the chemical, so try not to mow the lawn before spraying. Also, try and spray when the weed is more juvenile. This way you spray before it seeds and before the stem gets more mature and woody, allowing the chemical to be absorbed better into the plant. Spray when the lawn is as dry as possible and allow to stay on the plant for a couple of days before watering.
Sempra is suitable for all lawn types. and a 25g Bottle Covers up to 1923m2
Product Type: Herbicide
Mode of Action: Group B Herbicide
Group B herbicides block the ALS enzyme essential in the production of the
branched-chain fatty acids (amino acids) leucine, isoleucine and valine. These amino
acids are essential for the production of proteins and for normal plant growth, while
also providing precursors for a number of secondary products such as cyanogenic
glycosides, glucosinolates and acyl-sugars.
Group B herbicides are weak acid herbicides with moderate water solubility and are absorbed via the leaves and the roots, using the aqueous pathway.
Active ingredient(s): 750g/kg Halosulfuron-methyl
Formulation: Water Dispersible Granule
Other brand products with the same active ingredient include Sedgehammer and Nutbuster.