Spraying poa around greens

We applied 2 different chemicals for pre-emerging purposes this past Fall.  We sprayed a new chemical, that was available this past Fall, for pre-emerge on the majority of the golf courses.  It performed excellently and the few spots that poa did pop up was more than likely due to misses by the sprayer because of wind or during the next rainfall the the chemical was washed away.  The one drawback to this chemical is that it cannot be applied within 15 feet of bentgrass putting greens.  

The pre-emerge that we applied around the greens didn't produce the results we would like to see this year.  Several different factors play into the equation for the product to perform properly.  Temperature, timing, rainfall after application, operator variances, etc all play into the formula.  After a visit from one of our chemical distributors we were quickly able to go out and start cleaning up these areas. 

To do this we sprayed Round-up around the greens and we went right up to the edges of the green.  This is kind of tricky and took a little more effort and man power than usual chemical applications.

Here are a few pictures we took throughout:

Poa popping up

Established Poa annua #4 green

Here we have a walking sprayer along w/ a hose man. 

Also, a 3-man crew walking along side holding a screen to keep Round-up from drifting onto the bentgrass.

Spraying the bunker faces and other slopes that the walking sprayer cannot reach

Another shot of the spraying crew

 A few weeks later (a some warmer days) the Poa is yellowing

 A few weeks later (a some warmer days) the Poa is yellowing

A few weeks later (a some warmer days) the Poa is yellowing