Saw a recent post from MSU that prescribed Gly + Oust rather than Imazapyr for use around hardwoods. The rates they gave were on a per acre basis. Most of the areas I have to treat are along roadsides and are more suited to spot treatment rather than a broadcast application.

Any experience with Oust on Cogon Grass ? It’s got to be better than glyphosate alone.

No experience with it but I have had GREAT success with Eraser max on Cogon near or in hardwoods. It contains a very small amount of imazapyr, and it hasn’t damaged any hardwoods I’ve sprayed it around. I’m not giving the green light on it, but that’s what I’ve noticed. I’ve also killed Cogon with one properly applied application of straight gly with nothing else.

I’ve had success with gly but sometimes it takes a second or third application.

I had success with straight Gly but it took 3 applications

I’ve had mixed results. Both with Gly+adjuvants and Gly+Imazapyr. My normal mix is similar to the Eraser Max that Matt posted about, and it’s the same as the RM43 that TSC sells.

I got a couple of spots that look like they’ve never been sprayed but were definitely sprayed and appeared dead last year.

My question on the Oust is due to the fact I know I killed a few 8-10” DBH red oaks last year. Cogon too in that spot.

I’ve ordered some Oust and will give it a try. Found a reference to a mix with .08 oz/gallon for spot applications and that is close to the per acre rate.

5% and wet the piss put out of it. Could take more than 1 application.

This is interesting as I have a friend who does understory spraying with a skidder. Most of the places he works has waxy understory like Yaupon so he commonly uses a prescription with both GLY and Garlon for the waxy leaved vegetation. He has observed Cogongrass taking a hard hit and wondered if it was just higher gallons per acre or if the Garlon actually had some effect. I'll ask him about Oust and Escort. I do know that a water treatment such as Quest or Hel-Fire really seems to make a difference in all prescriptions.