Assessment of the interactions between two predator mites of Tetranychus urticae (Acariformes: Tetranychidae) in laboratory

Tetranychus urticae (Acari: Tetranychidae) is one of the most important pests in ornamental cultures. Between the species most used for its control are Neoseilus sp. and Phytoseiulus persimilis (Acari: Phytoseiidae). Knowing the effectivity and ages of the prefers prey of each species of predator. In this search purposed the management of the plague through the use of combined releases, is necessary to evaluate that could occur between them with the prey when they act together. With this aim, we evaluated any situations. For one side was evaluated when a predator with a second predator with more density for the first predator. This situation was analyzed in presence and with absence of its prey. For other side, was evaluated the interactions of both predators are presents at the same density and with the prey. In the fist situation in presence of the prey was observe that increase the age of predator in minor density also increase the interference over the consumption of the high population’s predator over the prey. Moreover when decreased the T. urticae’s consumption increased the intraguild consumption. P. persimilis in absence of T. urticae and in presence of N. californicus approve a behavior of intraguild predation over all the ages of its cospecifics, while that N. californicus only consumed coespecific’s larvae in the phytofagous absence and in presence of P. persimilis. When both predators were in the same test at the same population’s density, was not observe a higher consumption of T. urticae that when each predator act for its way