confirm root aphids. good luck. lots of people have them, they are infesting everybody. and they will kill your roots.
probably the hardest bug to get rid of
1) they asexually lay live pregnant young
2) they fly and lay eggs that can survive over winter and hatch next year
the only thing i am hearing that works is liquid pyrethums, met 52, botaniguard, bayer tree and shrub or merit 75 (systemic chemy).
i am trying mighy wash, then adding met 52 fungus
still trying to figure out how to get rid of the eggs. hope i dont have to buy all new equipment...hopping the met52 will keep them dead when they try to enter the soil.