Abstract
The identity, abundance of mite species on grape leaves was determined in 6 vineyards in Valencia, Spain, during 1983 and 1984. The tetranychids Tetranychus urticae and Panonychus ulmi occurred throughout the vegetative period at low to moderate population levels. Eight predator species were identified, 7 phytoseiids, Typhlodromus phialatus, Euseius scutalis, E. stipulatus, Amblyseius californicus [Neoseiulus californicus], Amblyseiella setosa, Phytoseiulus persimilis and T. rhenanoides [Amblydromella rhenanoides], and the stigmaeid Agistemus cyprius. T. phialatus was the dominant predator. Vineyards which had been scarcely treated with pesticides had higher predator populations. The population levels were similar in 1984 to those in 1983 in the case of Tetranychus urticae and Typhlodromus phialatus, and much lower for Panonychus ulmi and the remaining predators
