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Issue link: http://gcmdigital.gcsaa.org/i/352181
82 GOLF COURSE MANAGEMENT 08.14 day intervals), all while not affecting the cool- season bentgrass. The low residual activity of the product then allows bentgrass to be re - seeded in the treated areas as quickly as seven days after the last application. The experiment We set an application schedule, with an initial treatment date of June 20, 2013. All ap - plications were applied to 5,000 square feet of fairway and 1,000 square feet of nursery main - tained at greens height at a rate of 1 ounce per acre. We sprayed fairways with Xonerate in two locations, incorporating the frst 2,500 square feet of each. The greens-height nurs - ery area that was included in this experiment was maintained similarly to all other greens in terms of mowing height and spray programs, but was not rolled or double-cut. Following the frst application on June 20, we followed up with a second application on July 3 and a third application 15 days later on July 18. We followed the same application re - gime as with our frst application. The results Along the way, Centre Hills Class A super - intendent Gabe Menna and I closely moni- tored the treated areas following each treat- ment. As we anticipated, we noticed very little effect on the Poa annua after the frst applica - tion. However, shortly after the second appli- cation, results became more obvious: The Poa was noticeably chlorotic and weakened. Need - less to say, we liked what we saw. A little more than two weeks later, follow - ing the third application of the herbicide, our Poa problem was just about resolved — the Poa annua plants were near total annihilation. We had planned a fourth application, slated for Aug. 1, 2013, but in evaluating the situation with Menna and Centre Hills spray technician Tom Finlay, we decided not to go with this fourth treatment due to the high percentage of Poa annua in the cleanup areas in our fairways, as well as the high percentage Chip Fogleman, director of golf course management at Centre Hills CC in State College, Pa., with Makai. Although we still have four or fve other strains on the course, it appears that one, at least, will not survive.