I think spraying the plants with a soap solution would take care of them. Be sure to use soap, and not a detergent. Dishwashing liquids are usually detergents.
vintagejuls - tea made from redworm excrement. cut 7-to-1 with water. check out your local farmers market - someone will probably have red wigglers and "tea" to sell. or you can make your own; see Vermiculture at Google.
Soap can be little chips off of a bar of soap, or it can be something like Liquid Ivory.
I've used Kirk's Castile Soap and Neutrogena Fragrance-Free, both bar soaps, before, too. (The Neutrogena was "between bars of soap"; it's a little pricey to use this way....)