In the wild stink bugs lay their eggs on leaves, and additional experiments showed that the bugs placed darker eggs on the top (in direct sunlight), whereas eggs on the shaded underside of the leaf contained 2.1 times less pigment on average. (sciencemag.org)
Control: In the early stages, these mites can be eliminated by washing the plant with a mild soap solution, then spraying the plant with water, including the undersides of leaves where the mites usually harbor. (fieryfoodscentral.com)