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THE EFFECT OF EXCLUSION FENCES ON THE COLONIZATION OF RUTABAGAS BY CABBAGE FLIES (DIPTERA: ANTHOMYIIDAE)1

Published online by Cambridge University Press:  31 May 2012

Robert S. Vernon  and
John R. Mackenzie
Robert S. Vernon
Affiliation:
Pacific Agri-Food Research Centre, Agriculture and Agri-Food Canada, Agassiz, British Columbia, Canada VOM 1A0
John R. Mackenzie
Affiliation:
Pacific Agri-Food Research Centre, Agriculture and Agri-Food Canada, Agassiz, British Columbia, Canada VOM 1A0
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Abstract

A specially constructed fence was developed to exclude cabbage flies, Delia radicum (L.), from plantings of rutabaga. The number of first-flight female D. radicum caught on traps inside fenced enclosures declined linearly with fence height from 0 to 90 cm. Females caught in plots surrounded by a 90 cm high fence were 80.6 and 82.8% fewer than in open check plots in 1991 and 1992, respectively. The percentage of transplanted rutabagas killed by cabbage maggot in the 90 cm high enclosures was 1.4% in 1991 and 25.5% in 1992, compared with 11.8 and 84.5% in the open check plots, respectively. The mean damage index rating for rutabagas was severe in the open check plots but slight in the 90 cm high enclosures in 1991. Only 1.2% of rutabagas in the open check plots would have been of marketable grade in 1991, compared with 54% in the 90-cm enclosures. The mean damage rating was highest in the open check plots in 1992, but damage was also severe in all fenced plots due to the heavy infestation levels that year. The potential of exclusion fences for use in pest-management programs for rutabagas and other brassica crops is discussed.

Résumé

Un type particulier de barrière a été mis au point pour empêcher l’entrée de l’anthomyiie Delia radicum (L.), la Mouche du chou, dans les cultures de rutabagas. Le nombre de femelles de D. radicum attrapées au cours de leur premier vol à l’intérieur d’enceintes clôturées a diminué de façon linéaire en fonction de la hauteur de la barrière entre 0 et 90 cm. Les femelles capturées dans les enceintes entourées d’une barrière de 90 cm de hauteur ont été de 80,6% et 82,8% moins nombreuses que les femelles dénombrées dans des parcelles de terrain ouvert en 1991 et 1992. Le pourcentage de rutabagas tués par la Mouche du chou dans les enceintes entourées d’une barrière de 90 cm a été de 1,4% en 1991 et de 25,5% en 1992, comparativement à 11,8 et 84,5% dans les parcelles témoins ouvertes. Le coefficient moyen des dommages infligés aux rutabagas a été élevé dans les parcelles témoins, mais faible dans les enceintes fermées d’une clôture de 90 cm en 1991. Seulement 1,2% des rutabagas dans les parcelles témoins ouvertes auraient pu être vendus en 1991, comparativement à 54% dans les enceintes protégées. Le coefficient moyen des dommages a été maximal dans les parcelles de terrain ouvert en 1992, mais les dommages ont été élevés dans toutes les parcelles clôturées cette année-là, à cause des taux particulièrement élevés d’infestation. Le potentiel de ces barrières dans les programmes de lutte contre les insectes nuisibles dans les cultures de rutabagas et d’autres plantes du genre Brassica est examiné.

[Traduit par la Rédaction]

Type
Articles
Information
The Canadian Entomologist , Volume 130 , Issue 2 , April 1998 , pp. 153 - 162
Copyright
Copyright © Entomological Society of Canada 1998

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References

Brooks, A.R. 1949. The identification of the commoner root maggots of garden crops in Canada. Division of Entomology, Canada Department of Agriculture, mimeographed pamphlet.Google Scholar
Brooks, A.R. 1951. Identification of the root maggots (Diptera: Anthomyiidae) attacking cruciferous crops in Canada with notes on biology and control. The Canadian Entomologist 83: 109–120.CrossRefGoogle Scholar
Finch, S., and Skinner, G.. 1975. Dispersal of the cabbage root fly. Annals of Applied Biology 81: 1–19.CrossRefGoogle Scholar
Giles, K.I. 1987. Estimation of an economic threshold for the tuber flea beetle, Epitrix tuberis Gentner (Coleoptera: Chrysomelidae), on potato in British Columbia. Master of Pest Management Professional Paper, Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia.Google Scholar
Havukkala, I. 1988. Non-chemical control methods against cabbage root flies Delia radicum and Delia floralis (Anthomyiidae). Annales Agriculturae Fenniae 27: 271–279.Google Scholar
Hawkes, C. 1972. The estimation of the dispersal rate of the adult cabbage root fly (Erioischia brassicae (Bouche)) in the presence of a brassica crop. Journal of Applied Ecology 9: 617–632.CrossRefGoogle Scholar
Hawkes, C. 1974. Dispersal of adult cabbage root fly (Erioischia brassicae (Bouche)) in relation to a brassica crop. Journal of Applied Ecology 11: 83–93.CrossRefGoogle Scholar
Hough-Goldstein, J.A. 1987. Tests of a spun polyester row cover as a barrier against seedcorn maggot (Diptera: Anthomyiidae) and cabbage pest infestations. Journal of Economic Entomology 80: 768–772.CrossRefGoogle Scholar
Judd, G.J.R., Vemon, R.S., and Borden, J.H.. 1985. Monitoring program for Psila rosae (F.) (Diptera: Psilidae) in southwestern British Columbia. Journal of Economic Entomology 78: 471–476.CrossRefGoogle Scholar
King, K.M., and Forbes, A.R.. 1954. Control of root maggots in rutabagas. Journal of Economic Entomology 47(4): 607–615.CrossRefGoogle Scholar
Millar, K.V., and Isman, M.B.. 1988. The effects of a spunbonded polyester row cover on cauliflower yield loss caused by insects. The Canadian Entomologist 120: 45–47.CrossRefGoogle Scholar
Schoene, W.J. 1914. The cabbage maggot in relation to the growing of early cabbage. New York Agricultural Experiment Station Geneva Bulletin 382.Google Scholar
Skinner, G., and Finch, S.. 1986. Reduction of cabbage root fly (Delia radicum) damage by protective disks. Annals of Applied Biology 108: 1–10.CrossRefGoogle Scholar
Tuttle, A.F., Ferro, D.N., and Idoine, K.. 1988. Role of visual and olfactory stimuli in host finding of adult cabbage root flies, Delia radicum. Entomologia Experimentalis et Applicata 47: 37–44.CrossRefGoogle Scholar
Vernon, R.S. 1979. Population monitoring and management of Hylemya antiqua and Thrips tabaci in British Columbia onion fields, with observations on other root maggot populations. Master of Pest Management Professional Paper, Simon Fraser University, Burnaby, British Columbia.Google Scholar
Vernon, R.S., Hall, J.W., Judd, G.J.R., and Bartel, D.L.. 1989. Improved monitoring program for Delia antiqua (Diptera: Anthomyiidae). Journal of Economic Entomology 82: 251–258.CrossRefGoogle Scholar
Wheatley, G.A. 1975. Physical barriers for controlling cabbage root fly. National Vegetable Research Station Annual Report (Wellesbourne) for 1994: 97 pp.Google Scholar