James, D.G. and Whitney, J.W., 1993. Mite populations on ~apevines in south-eastern Australia:Implications for biological control of grapevine mites (Acarina: Tenuipalpidae Eriophyidae) Exp. Appl. Acarol., 17: 259-270.Pest and predatory mite populations were monitored over a 2 year period on grapevines in three viticultural regions of southern Australia (The Riverlands, Sunraysia and Murrumbidgee Irrigation Area[MIA]). The mite pests Brevipalpus spp., Colomerus vitis (Pagenstecher) and Calepitrimerus vitis (Nalepa) occurred in each region with a predatory mite fauna which showed considerable interregional variation in incidence, abundance and composition. Nine species of Phytoseiidae, the dominant predatory mite family, were recorded inhabiting grapevines. In the Riverlands, mite populations were apparently suppressed by two phytoseiids (Typhtodromus doreenae Schicha, Amblyseius victoriensis (Womersley)) in vineyards on which no insecticide was u~d and on which sulphur and copper were used to control vine diseases. In Sunraysia and MIA, vineyards which generally had greater inputs of synthetic pesticides, particularly fungicides, five to eight phytoseiid species were recorded. However, they were less abundant and appeared to have less impact on mite (particularly Brevipalpus spp.) populations. The population dynamics of pest and predatory mites on grapevines in southern Australia and implications tbr mite management based on biological control are discussed with respect to pesticide (particularly fungicide) inputs and phytoseiid biology~ecology, The vineyards of inland Southern Australia have relatively few insect and mite pests and none which could be considered a key pest seriously affecting grape production. Most pests of grapevine are of minor-moderate importance and are often irregular in incidence and abundance. Amongst the minor-moderate pests of Australian grapevines are mites of the families Tenuipalpidae (false spider mites) and Eriophyidae (rust mites). One or two species of the false spider mite genus