MSMA herbicide is used to control invasive weed species in residential lawns. It is effectively used to eradicate crabgrass, sandbur and nut sedge. Yellowing of the lawn may occur, and MSMA is not suitable for all types of lawns. Make sure you read all the directions to ascertain the suitability of the product for your lawn needs. When using the product on new lawns, wait until after the lawn has been mowed at least three times.
Don protective clothing, chemical-resistant gloves and eye protection before mixing MSMA herbicide. A respirator will prevent the inhalation of herbicide vapor.
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Mix MSMA herbicide with water in a hand sprayer. Do not use a hose sprayer. For young plants or in conditions where the temperature is 90 degrees Fahrenheit or above, mix 2 tbsp. (or 1 fluid oz.) with 1 gallon of water. This will cover an area of 250 square feet. Increase proportionately for larger areas.
Mix a stronger concentration of MSMA herbicide when spraying mature weeds or in weather between 75 degrees and 90 degrees Fahrenheit. Use 2 1/2 tbsp. or 1 1/4 fluid oz. of herbicide for each gallon of water. This will cover a 250-square-foot area.