Good stuff, the RTU costs around $30 a pint. Concentrate is arund 275 a gallon, but there is a big scaled discount on a case last I bought it. Think the dilution is around 100:1
When I was with MCC I called them and ordered the concentrated by the case directly, getting the dealers discount.
I've seen good results on Sorbus, Malus, Tillia, Salix, Gleditsia and a few others.
Fred suggested it to a client for Populus root sprouts in the lawn, and had excelent results.