This is probably going to be an unpopular opinion here (I know it is with golf course superintendents) but methyl bromide shouldn’t be used. It contributes to the depletion of the ozone layer, so there are more ultra-violet rays reaching the earth’s surface and leading to increased incidence of skin cancer in humans, besides having adverse affects on other species. It seems to me that skin cancer is too high a price for pure golf greens.
And yes, I am aware that methyl bromide is a naturally occurring substance, but humans are releasing more than the atmosphere can absorb.
And yes, I’m aware that other industries, such as agriculture and ship fumigation, use far more MB than the turfgrass industry, but that’s no justification, just as one petty theft isn’t justified by many larger ones.
May I suggest as a substitute the product Basamid for soil fumigation. I have used Basamid to fumigate bentgrass greens contaminated with bermudagrass and found it to be completely effective. It is less toxic than MB and more environmentally friendly.
And no, I have no commercial interest in either product.