What you'll see: Stunted plant growth, curled or distorted foliage; tiny green, brown, or black insects on undersides of leaves.
Management: Wash the bugs away with a stream of water, or knock them off with your fingers or a cotton swab. Spray on an insecticidal soap, such as Safer Brand Insecticidal Soap, or make your own by mixing a mild dish detergent in a weak concentration with water. As an alternative, try neem oil.
By Marisa Villarreal