While Casoron herbicide kills broadleaf and grassy plants, it leaves well-established deep-rooted plants intact. The active chemical ingredient in Casoron is dichlobenil. The manufacturer, Chemtura Canada Co., produces Casoron in the shape of granules for ease of application. The chemical becomes volatile in high temperatures and loses much of its effectiveness. Chemtura recommends application during temperatures of less than 59 degrees F. You can apply Casoron by hand, with small spreading equipment, or with tractor-mounted spreaders.
Things You'll Need
- Chemical-resistant gloves
- Long-sleeved shirt
- Long pants
- Closed-toed shoes
- Herbicide spreader (optional)
- Wet mulch (optional)
Allow any wanted plants to grow to maturity with established roots. Allow any transplanted crops to grow for four weeks before applying Casoron.
Clear any weeds by hand or with cultivating equipment in early spring or late fall.
Spread granules evenly over the soil. According to Chemtura, apply 1.5 to 2.5 ounces of Casoron per 40 square feet. The Arnold Arboretum recommends applying 1 ounce per 20 square feet.
Irrigate with 1/2 to 1 inch of water to allow the granules to dissolve. Alternatively, cover the granules with wet mulch.
Repeat each year as needed.