Although six species of tetranychid mites have been reported as attacking apple in New York, only the European red mite, Panonychus ulmi (Koch), is at present of general economic concern. Occasionally, the two-spotted spider mite, Tetranychus urticae Koch, is troublesome late in the growing season. Such infestations, however, are sporadic and localized. Acaricidal evaluations in 1973 were conducted only against the European red mite.