On houseplants spider mites often become a problem in November when the heat comes on and the air is drier. Phytoseiidae are the most important predators of spider mites. Naturally-occurring species often keep spider mites under control on outdoor plants. The are also the most commonly used commercially available natural enemies for controlling spider mites in greenhouses. They are not recommended, however, for controlling heavy infestations indoors, or problems on individual plants.
Chemical control is often the best option for battling spider mites.
Frequent applications of insecticidal soap can be very effective. Soap has no residual activity and only affects the mites it is sprayed directly on, so thorough coverage of the foliage and repeated applications are essential. Most of the mites are on the underside of the leaves, so that's where the soap spray needs to be applied. Insecticidal soaps are very effective and should be the first choice for most spider mite problems. However, other chemicals with residual activity can be used when there is no danger of children or pets contacting the leaves.