Mach 2 is better as a currative. I just took a class at Rutgers and learned that Mach 2 has very little effect on the oriental bettle grub which is the most common in NJ. I was not happy to hear this because I use Mach 2 ,but now I'm reluctantly swtching to merit. I do not like the way merit spreads do to its odd shape.
Mach 2 is a better curative and at the new rates should work as well as Merit on just about all grub species. Keep in mind that he rates were just increased significantly on the label within the last year. Failures going back two years may be due to the lower rates that admittedly were not as effective.
If cost is a concern and you are an IPM operator ask yourself why you would go wall to wall with Merit when you can treat with Mach 2 on an as needed basis?
oh, yes merit doesnt have very good curative control, and Bayer never claimed it did, its mostly a preventive. And sometimes preventing a problem is much better for costs, enviorment & all then waiting and using curative controls.
hey guys i just attended a seminar on the 19th now that dow has changed the chemical competition of active ingrediants they are now actually guaranteeing the apps done with mach2 and are reducing the price by 10% i would talk to dow at www.dowagro.com for specifics but i am intrigued
i don't believe i have ever, ever had a grub problem when i've used merit. even when working on properties where the owner told me they have a history of grub problems. i did use mach 2 yrs ago, on a couple of properties, but probably just got lucky.