Preemergence Herbicides<BR>If irrigation is not available, apply well in advance of expected weed germination to allow for an activating rainfall. <BR>Loss of activity may occur if they are not watered in within 7 to 10 days. <BR>Losses from photodecomposition and volatilization <BR>Treflan (Team) is the most volatile, Barricade the least volatile. <BR>