Most wheat/oats are 4 inches (three or more tillers) tall or taller and you need to put out your winter weed control. I really prefer by ground but, it is wet. If you put out by air PLEASE try to use 3-5 gal per acre, for coverage down in the canopy. Edges can really be a problem and windy days cannot give you coverage you need.
Harmony Extra SC plus MCPA – per label, always add surfactant per label.
Express Plus MCPA – per label, always add surfactant per label. Gives good to excellent control on most winter weeds. DO NOT USE THIS ON OATS.
POWERFLEX and Others – per label, gives excellent weed and ryegrass control. Read label for plant back restrictions.