How do I control mites on my orchid?
Mites appear during warm, dry weather. Increasing humidity and leaf wetness and, if possible, decreasing temperature help prevent infestations. A method of control involves a pint of 409 household cleaner and a pint of rubbing alcohol mixed with water to make 1 gallon of spray. This method is especially effective as a preventative or to control light infestations. For any miticide, homemade or purchased, apply a heavy coating, especially to the underside of leaves. Reapply every three to four days for six to eight applications. This will ensure that both the adults and hatching young are eliminated.
Other pest control help for orchids:
Courtesy of the NYBG Information Service