Antonelli, Arthur L.

Bounfour, M.

Murray, Todd A.

Tanigoshi, Lynell K.

Undetermined

ScholarsArchive@OSU

SectionVIII: Mites and Sap-sucking InsectsSPATIAL DISTRIBUTION OF SPIDER MITES(ACARINA: TETRANYCHIDAE) ON RED RASPBERRY PLANTS.Bounfour, L. Tanigoshi, A. Antonelli and T. Murray.Department ofEntomologyWashington State UniversityPullman, Washington 99163509/335-5818malika@wsunix.wsu.eduAbstract:Field surveys carried in 1995 and 1996 indicated that phytoseiid mites, mainly NeoseiulusfallacisGarman, regulate twospotted spider mites (TSSM), Tetranychus urticae Koch and yellow spidermite (YSM), Eotetranychus carpini borealis (Ewing) populations (Figure 1).We also found that within plant distribution of twospotted spider mite iseffected by thedistribution ofyellow spider mite and phytoseiid mites (p >0.0001), indicating that competitionand predation are important factors in twospotted spidermite population dynamics in raspberryfields in Northwest Washington.140-120-X 100-cH•^ 80-1 60-s-aS- 40 -20-n .Figure 1: Populationdyriamic* of TSSM andPhytoseiid\v „MM• iA» iA i. tmites inWhatcom County(1996•coOS•36cTSSM~~" " phytoseiids 1\A\VIII lV *1 * * *^ -r16- 14- 12- 10- 8- 6- 4- 216-May<23-May18-Jun1-Juli * i i I 1—1—I—f-3 O O O2 < < <T- T- lO (Q«" CMDateH—1—I—1—T-^?"=3o. a. —'o o 2 <•CO co 9 Ca r* co cir-[ CM O- 03)JI117

Spatial Distribution of Spider Mites (Acarina: Tetranychidae) on Red Raspberry Plants

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Spatial Distribution of Spider Mites (Acarina: Tetranychidae) on Red Raspberry Plants

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