My remedy for this is tri-fold.
1. Examine your plants leaves, rub your fingers on both sides, this will kill larvae that may be hiding on the underside.
2. When you notice you may have an infestation spray your plants with a solution of 26 oz. of water ( typical small spray bottle size), 2 tablespoons kitchen soap (vegetable based with no *SSL Sodium Laurel Sulfate) and one teaspoon cayenne pepper. Spray your plants, both sides of the leaves once a day for 3 days straight examine and reapply if necessary. Do this in the early morning or late at night, not in the high heat of the afternoon.