Notes on Phytophagous and Predatory Mites of Arizona1

Abstract

This paper is an annotated list of 38 Arizona species of phytophagous mites, 2 of which are probably undescribed, and of 13 species of predatory mites, 3 of which are probably undescribed. The list is based upon collections made by the writers and associates during the past 6 years and upon collections of others in the meantime and previously. The host(s), place(s) and date(s) of collection, an occasional notation as to degree of infestation and other information, considered pertinent and timely, are included. Of the phytophagous mites, the records indicate that Tetranychus cinnabarinus (Bois.) is the dominant species, with T. desertorum Banks, T. telarius (L.), Petrobia latens (Müll.) and Bryobia praetiosa Koch following in the order given. Of economic importance to crops in Arizona, the data contained in the paper indicate that the above named species rank ill the same order as their dominance, with Oligonychus pratensis (Banks) probably coming next, in either category.