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Phytoseiulus persimilis (Acari: Phytoseiidae) Functional Response in the Biological Control of Tetranychus urticae (Acari: Tetranychidae) Eggs on Rose Foliage Discs

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Abstract The functional response of Phytoseiulus persimilis Athias-Henriot (Acari: Phytoseiidae) preying on Tetranychus urticae Koch (Acari: Tetranychidae) eggs on leaf discs of three varieties of rosebush was determined at eight… Click to show full abstract

Abstract The functional response of Phytoseiulus persimilis Athias-Henriot (Acari: Phytoseiidae) preying on Tetranychus urticae Koch (Acari: Tetranychidae) eggs on leaf discs of three varieties of rosebush was determined at eight time intervals (0–2, 2–4, 4–6, 6–8, 8–10, 10–12, 12–24, and 0–24 h). Some differences in handling time (Th) and attack rate (a′) among the three plant varieties (Royalty, Pareo, and Starlite) were observed, but the functional response on the three varieties shifted from Type II to Type III at three time intervals within the 24-h observation. The observed shift in functional response was likely due to different rates of attack and handling times linked to the prey and the plant variety.

Keywords: acari; functional response; phytoseiulus persimilis; acari phytoseiidae; tetranychus urticae

Journal Title: Journal of Entomological Science
Year Published: 2019

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