Hi ilex. I'm doubtful anyone understands the purpose of the buttermilk in this recipe but I think it's a little bit acidic and thick. I think if you can't find it, I would substitute plain yogurt, thinned with plain milk with a touch of lemon or white vinegar. I do know that when I try this, I'm going to strain the mixture before spraying. It's going to be a real pain but cheap and the couple of times people said they tried it, it did work for them. Obviously, like all sprays for this pest, it must be very a thorough spray. One person said that they suspected it suffocates the mite without hurting the plant. Good luck!
|