Too much certainty herbicide applied - Help!
I have a mainly KBG/Ryegrass lawn with some crappy tall fescue mixed in. When we moved we had a crabgrass and triv infestation, so we killed it off and started over. Now, the triv is back 2 years later and taking over in a lovely lime green ugly variant.
I got some certainty and I applied too much (don't ask why, but I screwed up). I applied 1.15-1.25 oz per acre instead of the recommended 0.75.
I realized this about an hour later (thanks to labels changing) and doused the lawn with lots of water about 2-3 hours after the application (at 7pm at night). It rained like hell last night as well. I also mowed the grass short (bagging the clippings) 8 hours after the application in the hope of stunting the translocation of the chemical (the grass was very long before the app). Lastly, I used a crappy surfactant (80% non-inert instead of the 90%+ recommended on the label).
Do you think I have a chance of saving my lawn or am I screwed? Will the KBG survive the higher dosage and do you think the mowing, soaking of water and bad surfactant will help to save things?
Thanks in advance!