The Erythraeoidea (Trombidiformes: Prostigmata) as Biological Control Agents, with Special Reference to the Genus Balaustium

Erythraeoidea is a widely distributed group with great potential for practical use in biological control programs, but whose study has been limited due to the complex life cycle that often includes alteration in feeding behaviour and habitat. Several associations of these mites to different species of arthropods of agricultural importance have been reported; however, only in few cases, its effect in these populations has been verified. This chapter reviews information about the general morphological characterization of the superfamily; the diversity, distribution and habitats of the principal family, Erythraeidae; and subsequently gives special emphasis to the current knowledge of several aspects of Balaustium, the most widely studied genus. It is included the limitation for the current practical use of this group and some factors that need further studies.