Merit
I have a lot of experiance with Merit WSP (not granular). It works wonders as a soil injection for Jap. Beetle, Birch leaf miners, Bronze birch borer, Holly leaf miners, White flies and Lacebugs. It may take a month or two for uptake to be complete. Foliar sprays are not as effective as soil injections. It is an expensive product if not used properly. I have found (as have others) that using Merit to control Hemlock Woolley Adegid can cause mite outbreaks.