Whitefly

This appears to be whitefly. Whitefly live on plants throughout their three life-stages. During the first stage, whitefly lay eggs which appear on the underside of leaves as white patches arranged in regular curves. Each female can produce 100-200 eggs at a time. After the eggs hatch, they become larvae that suck out the nutrients of the leaves and stems. Their excreta, known as honeydew, causes black sooty mold. There are organic controls such as those that are formulated with Spinosad, but spray in the late afternoon or early evening after the bees have returned to their hives. Always follow the label on the product you choose to spray. Once the spray is dry it is safe for beneficial. There are also chemical formulations that are found at local garden shops that help combat whitefly.