The objective of this study was to determine and to analyse the diversity of mites on native Myrtaceae of the "Cerrado" vegetation type of the State of São Paulo, with particular attention to the families Phytoseiidae and Tarsonemidae. In the year 2000, mites were collected from Myrtaceae species in three "Cerrado" areas in the State of São Paulo. Samples of leaves, flowers and fruits were taken from three plant of each species in each site. Mites of 49 genera belonging to 14 families were found. Fourteen phytoseiid species of nine genera and 19 tarsonemid species of six genera were collected. The most abundant phytoseiids were Euseius citrifolius Denmark & Muma, Transeius bellottii (Moraes & Mesa) and Amblyseius acalyphus Denmark & Muma. The most abundant tarsonemids were Daidalotarsonemus tesselatus DeLeon, Daidalotarsonemus folisetae Lofego & Ochoa and Metatarsonemus megasolenidii Lofego & Ochoa. The highest indexes of diversity of phytoseiids and tarsonemids were observed in the fall; the lowest indexes were found in the winter for phytoseiids and in the spring for tarsonemids. Taking into consideration the total number of phytoseiids and tarsonemids collected in this work, the corresponding indexes of diversity (Shannon) were similar and close to 2.0. Different predatory mite species prevailed on distinct plant species, indicating the complementariness of the latter as reservoirs of the former.
Diversity; biological control; predator mite; phytophagous mite
