That's cool , but a soil drench would be preferable, unlike what Beta said. This is the root aphid thread, and the treatment is Imid. It is both safe and effective, however a drench is preferable and you should not see anything living after awhile. It breaks their life cycle.
guess I'll have to do a drench, the pests seem like they are almost gone, but I sure don't want them back they did enough damage!!!!!!!!!