Hostname: page-component-77c89778f8-n9wrp Total loading time: 0 Render date: 2024-07-20T01:09:52.044Z Has data issue: false hasContentIssue false
  • English
  • Français

EFFECTS OF ROOT DAMAGE BY CABBAGE MAGGOT, DELIA RADICUM (L.) (DIPTERA: ANTHOMYIIDAE), ON YIELD OF CANOLA, BRASSICA CAMPESTRIS L., UNDER LABORATORY CONDITIONS

Published online by Cambridge University Press:  31 May 2012

R.S. McDonald  and
M.K. Sears
R.S. McDonald
Affiliation:
Department of Environmental Biology, University of Guelph, Guelph, Ontario, Canada N1G 2W1
M.K. Sears
Affiliation:
Department of Environmental Biology, University of Guelph, Guelph, Ontario, Canada N1G 2W1
Get access Rights & Permissions [Opens in a new window]

Abstract

The effects of root damage by larval cabbage maggots, Delia radicum (L.), on yield of canola, Brassica campestris L., were examined in laboratory experiments. Inoculations of eggs or first-instar larvae resulted in significant root damage. Damage that exceeded 50% of taproot surface area resulted in fewer racemes, fewer productive seed pods on axillary racemes, lower total biomass, and reduced yield of seed. Despite the latter effect, damage that restricts the number of flowering racemes and induces abortion of seed on axillary racemes may increase the efficiency of yield in canola, which flowers indeterminately over a short growing season.

Résumé

Les effects de l’endommagement des racines du colza canola Brassica campestris L., occasionnes par la larve de la mouche du chou, Delia radicum (L.), et ses effets sur le rendement du canola, ont fait l’object d’expérimentations en laboratoire. Des innoculations de densités comparables d’ouefs ou de premiers stades larvaires ont eu comme résultat des dommages significatifs sur les racines en question. Quand les dégats excédaient 50% de la surface de la racine pivotant, les résultats suivants furent constates : moins de racemes, moins de cossess a graines productives sur les racèmes auxilliaires, une bio-masse totale moins importante, et un rendement réduit de graines. Malgré ce dernier effect, les dommages qui limitent le nombre de racèmes fleurissants, et qui induisent l’avortement des grains sur les racèmes auxilliares, peuvent augmenter l’efficience du rendement du canola, qui fleurit de maniere indéterminée pendant une courte saison.

Type
Articles
Information
The Canadian Entomologist , Volume 123 , Issue 4 , August 1991 , pp. 861 - 867
Copyright
Copyright © Entomological Society of Canada 1991

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Allen, W.R. 1964. The occurrence of cabbage maggot on rape in Manitoba and evaluation of insecticides for control. Proc. ent. Soc. Man. 20: 54–58.Google Scholar
Askew, W.L., Westdal, P.H., Romanow, W., and Stefansson, B.R.. 1976. Control of flea beetles and cabbage maggots on rape with insecticides, and effect on yield of rapeseed. Pesticide Res. Rep. 1976: 131–132.Google Scholar
Beirne, B.P. 1971. Hylemya brassicae (Bouché), the cabbage maggot. pp. 53–56 in Pielou, D.P. (Ed.), Pest Insects of Annual Crops in Canada. I. Lepidoptera. II. Diptera. III. Coleoptera. Mem. ent. Soc. Can. 78. 124 pp.Google Scholar
Griffiths, G.C.D. 1986 a. Relative abundance of the root maggots Delia radicum (L.) and D. floralis (Fallen) (Diptera: Anthomyiidae) as pests of canola in Alberta. Quaest. Ent. 22: 253–260.Google Scholar
Griffiths, G.C.D. 1986 b. Phenology and dispersion of Delia radicum (L.) (Diptera: Anthomyiidae) in canola fields at Morinville, Alberta. Quaest. Ent. 22: 29–50.Google Scholar
Lamb, R.J. 1989. Entomology of oilseed Brassica crops. A. Rev. Ent. 34: 211–229.CrossRefGoogle Scholar
Liu, H.J., and Butts, R.A.. 1982. Delia spp. (Diptera: Anthomyiidae) infesting canola in Alberta. Can. Ent. 114: 651–653.CrossRefGoogle Scholar
McDonald, R.S. 1985. Impact of the cabbage maggot, Delia radicum (L.) (Diptera: Anthomyiidae), on canola, Brassica campestris L., in north central Alberta. M.Sc. thesis, University of Guelph, Guelph, Ont. 98 pp.Google Scholar
McGregor, D.I. 1981. Pattern of flower and pod development in rapeseed. Can. J. Plant Sci. 61: 275–282.CrossRefGoogle Scholar
Morgan, D.G. 1982. The regulation of yield components in oilseed rape (Brassica napus). J. Sci. Food Agric. 33: 1266–1268.Google Scholar
Mukerji, M.K. 1971. Major factors in survival of immature stages of Hylemya brassicae (Diptera: Anthomyiidae) on cabbage. Can. Ent. 103: 717–728.CrossRefGoogle Scholar
Richards, R.A., and Thurling, N.. 1978. Variation between and within species of rapeseed (Brassica campestris and B. napus) in response to drought stress. I. Sensitivity at different stages of development. Aust. J. Agric. Res. 29: 469–477.CrossRefGoogle Scholar
SAS Institute Inc. 1985. SAS User's Guide, Version 5 Edition. SAS Institute Inc., Cary, NC. 956 pp.Google Scholar
Swailes, G.E. 1963. Effects of temperature on hatching and on longevity of starved first-instar larvae of Hylemya brassicae (Bouché) (Diptera: Anthomyiidae). Can. Ent. 95: 878–881.CrossRefGoogle Scholar
Zar, J.H. 1984. Biostatistical analysis, 2nd ed. Prentice-Hall Inc., Englewood Cliffs, NJ. 718 pp.Google Scholar