Over the winter I spent countless hours treating thousands of box elders that have invaded my 21 acres of crp pines. Use garlon 4 25% in fuel oil as a basal bark treatment. Also used tordon as a slash and squirt tx. on some. Now they are leafing out like nothing is wrong. A few look dead and some have leaves coming out only on top branches. My question is, is this a slow dying process and should I just be patient or did the treatments fail.