Patrick McDonagh said: For the first time in my 16 years we are getting a good population of grubs in our bentgrass tees and fairways. Much to the delight of our neighborhood skunks. Everyday we apply Dylox to the newly torn up areas. We have never sprayed our tees and fairways before due to our budget. What have you guys been successful with? Would it be best to spray in the spring or later in August when the grubs start to show up?
Thanks.
Patrick,
I have been at a couple of places we have done preventive treatment with good results. Years ago (99-00 time frame) we were applying Merit with a fertilizer carrier. It at the time cost us $150 per acre, a little stout, but I hear Merit (and their generic forms) are much cheaper now. It might be possible to spray a generic for I've hear between $25-30 per acre range. I can't confirm at this time, haven't check a price. We had grub problems at that course prior to Merit applications and it brought them under control.
Currently we use Acelepryn in a fertilizer/pre-emergent combo. It's about $272 an acre, which includes a spreader truck making the application for us. We have had great control (grub control that is, weeds, not quite as good) in the areas we've applied it. We also spray Acelepryn on greens, tee tops and a pass around our green banks. That cost is about $180 an acre, but we are going at the 12 oz/acre rate on greens to help with cutworms. (If my math is correct going out at the 8 oz rate, you can get 8 acres out of a 1/2 gallon jug and the cost is in the neighborhood of $120 per acre) Great control in those areas as well.
We try to make all our applications in the May window (also did this with the Merit as well), but I do know the window for Acelepryn is wider (we made a couple of applications in June with no issues).
We will continue to look at other grub control options, but with our small staff, the spreader truck (which is really not the expensive part of the application) with the fertilizer is our preferred method at the moment. We have so many other applications going on at that time, while costing us more, they can be in and out in as little as 45 minutes to two hours max depending on golfers, works best for us at this time.
Mel