The way jos14h did his area is absolutely effective, but of course, hopefully a last resort effort. Killing your entire lawn for an entire season can do things to your pysche that just can't be explained. The lawn people know what I'm talking about. However, I've thought about doing that a time or two. After I started realistically mulling things over, I couldn't guarantee that after I wiped out my entire lawn that poa in one of my many neighbors areas or even floating out of the woodlands (which I'm right next to) wouldn't reinfect my little corner of the world. And also my way of thinking pre-m does a lot more for me than just fight poa, so I keep fighting the fight. I'd like to be sitting on the porch drinking some beer instead, but then I digress... Anyway, if you don't have any neighbors and you aren't close to any woodlands or poa infected fields, I guess it's certainly an other alternative. If that doesn't fit your thinking right now, apply Dimension 2-3 times a year and see where that leads...you can always wipe out that lawn later.

I'm curious - I've read that one should apply Certainty in late fall. However - you seem to have applied it in the spring - any thoughts on that? I had such a problem I would've used Roundup if Certainty weren't available. As it happens, I later decided to reseed with elite bluegrass, so I could've saved some cash and gone with the Roundup to begin with. You live, you learn. It worked just fine--with no bluegrass burnout that I could see. I don't know if a fall app would've worked "better," although better in this case would have been a 100% kill instead of 99%. Somehow that doesn't concern me much. One more question: in your pics (the yard looks awesome, btw!) - you have a picture labeled as "Invader1", etc... Have you identified this "invader"? I have something similar. Does it grow in a star formation? I have a blend of KBG, p. rye and creeping fescue - these patches of this grass stand out like sore thumbs. It seems like perhaps a warm-season grass - almost like a finer-bladed crab grass... Thanks! I just mulched the newest garden bed today (the last, I think--a third of the property is now gardens and there is no remaining lawn against the house at all). The Invader1 and Invader2 images were what people identified as Poa trivialis. It was just very mature triv... Even if it weren't triv (I'm pretty sure it was), the Certainty took it down.

I killed off a boat load of it with round up last year. Of course I'm finding it elsewhere this year. What I had to do, however, was pull it up a bit and expose the soil and whack the blades of grass that were growing underneath the "mat". It became labor intensive so I raked out as much of the nasty stuff that I could before I hit it again with RU. Good luck.

I know this is an old thread, but anything can be killed by simply cutting off once a week until it dies. Many of us don't have the time or patients to do that. I started on Jonson grass in 1947 and didn't do it every week and worked at every year until 1973 on 164 acres. I finely killed with two applications of Roundup on 900 acres in and used less than a gallon of Roundup on wick applicator I built. I just had to touch the Johnson grass and died. The weather and mix of Roundup were right I never got it to work that good again. After that it always took the 3 or 4 applications to wipe out Johnson grass. It still beats 25 years on my knees digging up every year. You can kill any plant that lives by cutting off everything green once a week until it uses up all the nutrients stored under ground. It's best to start in late summer or early fall and not let it build up anything for the winter. An established stand of bamboo has lot built up in ribosomes it may be tough to kill. Cutting down bamboo the first time will be hard. If it were me I would cut it down in early August and let it grow back some then spray it with Roundup a week after the first good rain in August and two weeks later cut off everything green off every week until first frost then dig it up and turn the ribosomes up to dry. I would haul off as many ribosomes as I could cover them with a mix of Styrofoam and gasoline that makes a gooey mess and burn up all I hauled off. Leave the ribosomes in the turned up to dry over the the winter and spray everything with round up 8 weeks after it greened up in the spring. Then wait 3 weeks and start cutting off the green stuff ever week until it died. It might not green up in the Spring if you got a good rain the right mix of Round up and the Bamboo was growing good and storing nutrients and Roundup in the ribosomes. Some luck is involved it the process unless you irrigate. Gordon