Chateau herbicide (Valent BioSciences) received clearance this past fall for use in non-bearing apple and peach orchards and bearing and non-bearing vineyards.

Chateau has a broad spectrum of preemergence activity on broadleaf and grass species. As such, it is suggested for use as a stand-alone preemergence material that needs to be tank-mixed with a non-selective postemergence material, such as glyphosate or Gramoxone, to control emerged weeds.

Consider applying 6 to 10 ounces of Chateau per treated acre in early spring. If weeds have emerged, add Gramoxone plus a nonionic surfactant or crop oil. A second application at this same rate should be considered when control from the initial application begins to deteriorate. Gramoxone plus a nonionic surfactant or crop oil should be used if emerged weeds
are present. If morning glory, smallflower morning glory or cocklebur are a problem, Chateau should be used at a rate of 8 to 10 ounces per treated acre.

The Chateau label contains the following restrictions:

• For trees established less than three years growing in soil with a sand plus gravel content of over 80 percent, use a maximum rate of 6 ounces per acre.
  
• Do not apply to trees or vines established less than one year unless they are protected from spray contact by non-porous wraps, grow tubes or waxed containers.
  
• Do not make a sequential application within 30 days of the first application.
  
• Do not harvest fruit from treated trees within one year of application.
  
• Follow the most restrictive label limitations and precautions for the tank mix products being used.
  
• As with all pesticides, always read and follow label directions.