Seasonal timing of postemergence herbicide application is important, with late summer or early fall being the best time. Mature perennial weeds like dandelion or common plantain will regrow after contact herbicides are applied. Variability in weed control is common when herbicides are applied by homeowners. Ammonium sulfate applied with postemergence herbicide reduces antagonism, making herbicides more effective. The need for any additional adjuvants, surfactants, or fertilizers is indicated on the product label.
Herbicides are useful, effective tools in the control of weeds in turf areas.
Product labels should always be read and followed when using a herbicide, or any other pesticide. Herbicides are not a miracle cure, as they provide only short-term relief from weeds. The best approach is an integrated regime of proper mowing, fertilization, irrigation, and use of other cultural practices to maintain a vigorous turf. Mow high, follow the cultural practices to favor desired turf species. Use Acclaim , Dimension , or products that contain DSMA, Dacthal, Betasan, Balan, pendimethalin, or Tupersan.