8064 1 archive 4015 disk0/00/00/80/64 2006-04-19 2009-08-20 14:31:44 2009-08-20 14:31:44 journalp show 0 en us no ca yes 0 TRUE Bomford M.K. Vernon R.S. Pats Peeter pub 8planthealth 5vegetables 7biodiversity Myzus persicae, Delia radicum, physical control Aphids accumulate near exclusion fences designed to intercept Delia radicum (L.) movement into fields. Aphid accumulations increase with fence height, but are not affected by fence overhang length. Overall aphid levels are higher in small (4.3 x 4.3 m) enclosed plots than in unenclosed plots. Enclosing large (38 x 38 m) plots does not alter overall aphid catches, but does alter aphid distribution within enclosures. In large enclosures aphid accumulations are higher at enclosure perimeters than interiors, with the highest accumulations near enclosure corners. This concentric distribution is not observed in unfenced areas, and is not altered by the addition of a trap crop inside an enclosure. 2000 published Journal of the Entomological Society of British Columbia 97 Entomological Society of British Columbia Bomford, M.K., Vernon, R.S. and Pats, P. 2000. Importance of collection overhangs on the efficacy of exclusion fences for managing cabbage flies (Diptera: Anthomyiidae). Environmental Entomology 29: 795-799. Isard, S.A., Irwin, M.E. and Hollinger, S.E. 1990. Vertical distribution of aphids in the planetary boundary layer. Environmental Entomology 19: 1473-1484. Kennedy, J.S. and Thomas, A.A.G. 1973. Behavior of some low-flying aphids in wind. Annals of Applied Biology 76: 143-159. Lewis, T. and Dibley, G.C. 1970. Air movement near windbreaks and a hypothesis of the mechanism of the accumulation of airborne insects. Annals of Applied Biology 66: 477-484. Microsoft. 1997. Microsoft Graph 8.0. Microsoft Corp. Redmon, WA. Pats, P. and Vernon, R.S. 1999. Fences excluding cabbage maggot flies and tiger flies (Diptera: Anthomyiidae) from large plantings of radish. Environmental Entomology 28: 1124-1129. Vernon, R.S. and MacKenzie, J.R. 1998. The exclusion fence: A novel tool for Anthomyiid fly management. The Canadian Entomologist 130: 153-162. Zar, J.H. 1984. Biostatistical Analysis. Prentice-Hall, Englewood Cliffs, NJ. public 79-87 6015 1 8064 1 application/pdf en public

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