My junipers have recently reverted to putting out juvenile foliage. The base of these shoots are turning light green. Looks like some brown spots there as well. Possible cankers? Is this a fungal infection. I have Mancozeb being delivered tomorrow. Is it possible to stop this with just this fungicide? Do I soak the soil or protect my soil? Does Mancozeb kill microrhizae? Is this only effective as a preventative?