Typhoon is a systemic herbicide for use in the elimination of existing weeds excluding Lamium, Urtica, Malva, Prosopis and Alhagi. Typhoon is absorbed by the plant's foliage and is transported to the various parts of the plant, including those under the ground. Response time to the product depends on the weather and on the condition of the treated weed. After spraying of perennial weeds, avoid any processing of the soil that may damage weeds in the treated area for at least 7 days.