caa a22 4500 397570848 CHVBK 20180308164841.0 cr unu---uuuuu 161202e19960401xx s 000 0 eng 10.1093/ee/25.2.529 doi (NATIONALLICENCE)oxford-10.1093/ee/25.2.529 Release Strategies and Cultural Modifications for Biological Control of Twospotted Spider Mite by Neosieulus fallacis (Acari: Tetranychidae, Phytoseiidae) on Hops [Elektronische Daten] [Ward B. Strong, Brian A. Croft] Biological control of the twospotted spider mite, Tetranychus urticae Koch, on hops, Humulus lupulus L., with the predator Neoseiulus fallacis (Garman) was explored to understand the factors important in successful T. urticae management. The timing of introductions of N. fallacis, the height of release on the plant, overwinter survival, and cultural factors were investigated to determine the optimal use patterns for this predator. Release height seemed to be unimportant, but release timing was influential when there were unusually low or high T. urticae densities. N. fallacis overwinters in hop fields, but early spring cultural practices inhibit survival to summer. Three cultural practices, all for reduction of foliar growth, were found to be detrimental to biological control. Predators released into 0.25-ha plots in commercial fields maintained T. urticae to commercially acceptable levels throughout the season. A provisional management protocol is described for biological control of T. urticae with N. fallacis. © 1996 Entomological Society of America Physiological and Chemical Ecology nationallicence Tetranychus urlicae nationallicence Neoseiulus fallacis nationallicence hops nationallicence biological control nationallicence management protocol nationallicence release strategies nationallicence Strong Ward B. Department of Entomology, Cordley Hall 2046, Oregon State University, Corvallis, OR 97331 aut Croft Brian A. Department of Entomology, Cordley Hall 2046, Oregon State University, Corvallis, OR 97331 aut Environmental Entomology Oxford University Press 25/2(1996-04-01), 529-535 0046-225X 25:2<529 1996 25 ee https://doi.org/10.1093/ee/25.2.529 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/ee/25.2.529 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Strong Ward B. Department of Entomology, Cordley Hall 2046, Oregon State University, Corvallis, OR 97331 aut NATIONALLICENCE 700 1- Croft Brian A. Department of Entomology, Cordley Hall 2046, Oregon State University, Corvallis, OR 97331 aut NATIONALLICENCE 773 0- Environmental Entomology Oxford University Press 25/2(1996-04-01), 529-535 0046-225X 25:2<529 1996 25 ee Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford