Originally Posted by whitetail fanatic
AD, didn't you say that for tough perennial grasses we should use like 16 oz clethodim per acre?
WF, take a look at the label when you have some time to read, it is a lengthy one. It showed numerous rates for various crops and target weeds. Remember if the target weed is at the optimum height you can usually use the lowest rate. If the weed is matured you should use the highest rate. Most herbicides have a total allowable yearly rate per acre which may come into play when you have to make multiple applications in a year.
If you find you are having trouble controlling any weed with the highest rate your target may have developed a resistance to that particular herbicide or you are not applying it at the proper growth stage of the target weed. In this case a switch of herbicides may be required.
Someone posted they believe Cleth calls crop oil. Look at the crop on the label and use the recommended Adj. For instance non-ionic Surfactant is listed for ornamentals, I believe.