Abstract

Samples were taken from commercial Christmas tree plantations in England to determine the species of predatory phytoseiid mites on these trees, as a prerequisite to assessing the potential for biocontrol of eriophyoid and tetranychid mites. Numbers of phytoseiids in sprayed plantations were low. In larger, unsprayed trees on the same sites, phytoseiids were more numerous. Four species were identified: Typhlodromus pyri Scheuten, Anthoseius rhenanus (Oud.), Amblyseius andersoni Chant and Amblyseius cucumeris (Oud.). Typhlodromus pyri was the most common species found in sprayed plantations.

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