The combo of command and cotoran might be your problem. Command is pretty rough on sandy soils, typical chufa soil. Cotoran can also be rough look at your labels and see your specific rate for coarse soils it is typically a lower use rate on that type ground. Just a starting point.
That's good advice, and you are exactly right. The damage was worse on the sandy fields. I had talked with the FMC rep before trying Command, and he warned me to use a lower rate on sandy soil. I had some slight damage the first year using Command alone, but a lot of damage last year when using the combo. I could not find anyone who had ever used Command or Cotoran on chufa before, so a lot of it had to be guesswork.
The only reason I used Aim was that he gave me some free. I was trying to control carpetweed with it; didn't work too well, though you can see some that is turning brown in that first pic.
