Hostname: page-component-586b7cd67f-tf8b9 Total loading time: 0 Render date: 2024-12-04T09:33:25.567Z Has data issue: false hasContentIssue false
  • English
  • Français

Compensation of oil-seed rape (Brassica napus L.) plants after damage to their buds and pods

Published online by Cambridge University Press:  27 March 2009

Ingrid H. Williams  and
J. B. Free
Ingrid H. Williams
Affiliation:
Rothamsted Experimental Station, Harpenden, Hertfordshire
J. B. Free
Affiliation:
Rothamsted Experimental Station, Harpenden, Hertfordshire
Get access Rights & Permissions [Opens in a new window]

Summary

The relationship has been investigated between the yield of oil-seed rape (Brassica napus L.) plants and (a) the proportion of podless stalks, (b) the proportion of pods infested by seed weevil larvae and (c) the effect of removing a proportion of buds and pods. Plants compensated for damage and, although late removal of buds or pods sometimes caused greater yield loss than early removal, only plants with more than 60% podless stalks or buds removed had diminished yields. The numbers of podless stalks per plant increased with plant size. Removal of 60 % of a plant's pods caused no yield loss; in the field a maximum infestation of only 25% of the plant's pods with seed weevil larvae occurred. The results are discussed in relation to damage by pollen beetles (Meligethes aeneus Fab.) and seed weevils (Ceutorhynch.ua ossimilis Payk.)

Type
Research Article
Information
The Journal of Agricultural Science , Volume 92 , Issue 1 , February 1979 , pp. 53 - 59
Copyright
Copyright © Cambridge University Press 1979

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

Alford, D. V. & Gould, H. J. (1975). Survey of pest incidence on oil-seed rape in the U.K. Proceedings of the Eighth British Insecticides and Fungicides Conference 1, 489–495.Google Scholar
Allen, E. J., Morgan, D. G. & Ridgman, W. J. (1971). A physiological analysis of the growth of oil-seed rape. Journal of Agricultural Science, Cambridge 77, 339–341.CrossRefGoogle Scholar
Dmoch, J. (1965). The dynamics of a population of the cabbage seed-pod weevil (Ceuthorrhynchus assimilis Payk.) and the development of winter rape. Part 1. Ekologia Polska A 8, 249–287.Google Scholar
Free, J. B. & Williams, Ingrid H. (1978). A survey of the damage caused to crops of oil-seed rape (Brassica napus L.) by insect pests in south-central England and their effect on seed yield. Journal of Agricultural Science, Cambridge 90, 417–424.CrossRefGoogle Scholar
Gould, H. J. (1975). Surveys of pest incidence on oilseed rape in south-central England. Annals of Applied Biology 79, 19–26.CrossRefGoogle Scholar
Harris, K. M. (1962). Lepidopterous stem borers of cereals in Nigeria. Bulletin of Entomological Research 53, 139–171.CrossRefGoogle Scholar
Walker, P. T. (1960). The relation between infestation by the stalk borer Busseola fusca and yield of maize in East Africa. Annals of Applied Biology 48, 780–786.CrossRefGoogle Scholar
Williams, , Ingrid, H. (1978). The pollination requirements of swede rape (Brassica napus L.) and of turnip rape (Brassica campestris L.). Journal of Agricultural Science, Cambridge 91, 343–348.CrossRefGoogle Scholar
Williams, , Ingrid, H. & Free, J. B. (1978). The feeding and mating behaviour of pollen beetles (Meligethes aeneus Fab.) and seed weevils (Ceutorhynchus assimilis Payk.) on oil-seed rape (Brassica napus L.). Journal of Agricultural Science, Cambridge 91, 453–459.CrossRefGoogle Scholar
Winfield, A. L. (1962). Effect of early flower-bud removal on subsequent development of some brassica plants. Plant Pathology 11, 17–22.CrossRefGoogle Scholar
Winfield, A. L. (1963). Pests of Brassica seed crops. Agriculture 70, 228–232.Google Scholar