By Dwight Lingenfelter
With recent rainfall and warming weather patterns, spring oat and weed growth will soon speed up. Below is a listing of herbicide options to consider for weed control. You will notice that all the herbicides listed primarily control broadleaf weeds; no grass herbicides are labeled for use in oats. So hopefully, you are not having problems with downy brome, annual ryegrass, or bluegrass in your oat crop.
Herbicides labeled for use in spring oat include:
- 2,4-D (amine and ester)
- Harmony SG and Harmony Extra (numerous generic alternatives available)
- Sentrallas ("Harmony + Starane")
- Starane Ultra and Starane Flex
Make sure to apply the correct herbicide rate within the appropriate oat growth stage and not to exceed the maximum weed height otherwise crop injury or poor weed control will result. Some herbicides need to have adjuvants added to the spray tank, so be aware of this fact. Also, some of these products (e.g., Harmony products and related generics) restrict use on certain oat varieties. (On another note, I realize it’s a little too soon to be thinking about preharvest aids in oats, but only certain 2,4-D products and Aim are labeled for this utility.) Source : psu.edu