you could use the yellow sticky sheets as a prevention. if you got an infestation, flush them off your plant using water. need to do fast as they secrete a fluid that attracts other bugs and fungus/mold. after you flush them on to the ground you can use a pesticide to kill them on the ground. PUT THE YELLOW sticky sheets near the plant to attract them. clean off the area around the plants, as overgrown weeds and grass are the places where they can hide.
good luck