Skip to main content Accessibility help

Natural enemies and their impact on Diuraphis noxia (Mordvilko) (Hemiptera: Aphididae) populations

  • Y. K. Aalbersberg (a1), M. C. Van Der Westhuizen (a2) and P. H. Hewitt (a2)


The influence of natural enemies on the population growth of Diuraphis noxia (Mordvilko) in wheat fields in eastern South Africa was investigated. Since the natural enemies were not present in the initial stages, the apparent mortality observed must have been due to other causes. During the logarithmic phase of aphid population growth, predators, in particular the coccinellid Hippodamia variegata (Goeze), had a slight inhibitory effect on growth. During the decline phase of the aphid population, the potential population size was reduced by as much as 52% by predation. The most abundant parasitoids, Aphidius colemani Viereck and Diaeretiella rapae (M'Intosh), had a negligible effect. Although natural enemy populations showed functional responses to increases in Diuraphis noxia numbers, they did not prevent the latter from attaining and exceeding economic injury levels.


Corresponding author

* Address for reprint requests.


Hide All
Aalbersberg, Y. K. (1987). Ecology of the wheat aphid Diuraphis noxia (Mordvilko) in the eastern Orange Free State.—155 pp. M.Sc. thesis, Univ. Orange Free State, Bloemfontein, South Africa.
Aalbersberg, Y. K., Du Toit, F., Van der Westhuizen, M. C. & Hewitt, P. H. (1987 a). Development rate, fecundity and lifespan of apterae of the Russian wheat aphid, Diuraphis noxia (Mordvilko) (Hemiptera: Aphididae), under controlled conditions.—Bull. ent. Res. 77, 629635.
Aalbersberg, Y. K., Van der Westhuizen, M. C. & Hewitt, P. H. (1987 b). A simple key for the diagnosis of the instars of the Russian wheat aphid, Diuraphis noxia (Mordvilko) (Hemiptera: Aphididae).—Bull. ent. Res. 77, 637640.
Boughey, A. S. (1971). Fundamental ecology.—222 pp. London, Intertext Books.
Brown, H. D. (1969). The predacious Coccinellidae associated with the wheat aphid, Schizaphis graminum (Rond.) in the Orange Free State.—318 pp. D.Sc. thesis, Univ. Stellenbosch, South Africa.
Carter, N., McLean, I. F. G., Watt, A. D. & Dixon, A. F. G. (1980). Cereal aphids: a case study and review.—pp. 271–348 in Coaker, T. H. (Ed.). Applied biology. Vol. V.—407 pp. London, Academic Press.
Chambers, R. J., Sunderland, K. D., Wyatt, I. J. & Vickerman, G. P. (1983). The effects of predator exclusion and caging on cereal aphids in winter wheat.—J. appl. Ecol. 20, 209224.
Coon, B. F. & Rinick, H. B. Jr. (1962). Cereal aphid capture in yellow baffle trays.—J. econ. Ent. 55, 407408.
DeBach, P. (1974). Biological control by natural enemies.—323 pp. London, Cambridge Univ. Press.
Edwards, C. A., Sunderland, K. D. & George, K. S. (1979). Studies on polyphagous predators of cereal aphids.—J. appl. Ecol. 16, 811823.
Griffiths, E., Wratten, S. D. & Vickerman, G. P. (1985). Foraging by the carabid Agonum dorsale in the field.—Ecol. Entomol. 10, 181189.
Hagen, K. S. (1962). Biology and ecology of predaceous Coccinellidae.—A. Rev. Ent. 7, 289326.
Hodek, I. (1967). Bionomics and ecology of predacious Coccinellidae.—A. Rev. Ent. 12, 79104.
Hodek, I. (1973). Biology of Coccinellidae.—260 pp. The Hague, Junk.
Hofsvang, T. & Hågvar, E. B. (1975). Duration of development and longevity in Aphidius ervi and Aphidius platensis (Hym.: Aphidiidae), two parasites of Myzus persicae (Hom.: Aphididae).—Entomophaga 20, 1122.
Huffaker, C. B., Simmonds, F. J. & Laing, J. E. (1976). The theoretical and empirical basis of biological control.—pp. 41–78 in Huffaker, C. B. & Messenger, P. S. (Eds). Theory and practice of biological control.—788 pp. London, Academic Press.
Hughes, R. D. (1972). Population dynamics.—pp. 275–293 in van Emden, H. F. (Ed.). Aphid technology.—344 pp. London, Academic Press.
Kriel, C. F., Hewitt, P. H., van der Westhuizen, M. C. & Walters, M. C. (1986). The Russian wheat aphid Diuraphis noxia (Mordvilko): population dynamics and effect on grain yield in the western Orange Free State.—J. ent. Soc. sth. Afr. 49, 317335.
Kring, T. J., Gilstrap, F. E. & Michels, G. J. Jr. (1985). Role of indigenous coccinellids in regulating greenbugs (Homoptera: Aphididae) on Texas grain sorghum.—J. econ. Ent. 78, 269273.
Raworth, D. A. (1984). Population dynamics of the cabbage aphid, Brevicoryne brassicae (Homoptera: Aphididae) at Vancouver, British Columbia. II. Development, fecundity, and longevity.—Can. Ent. 116, 871878.
Scheller, H. V. (1984). The role of ground beetles (Carabidae) as predators on early populations of cereal aphids in spring barley.—Z. angew. Ent. 97, 451463.
Southwood, T. R. E. (1978). Ecological methods, with particular reference to the study of insect populations.—2nd edn, 524 pp. London, Chapman & Hall.
Starý, P. (1972). Aphidius platensis Brethes, its distribution and host range (Hym.: Aphidiidae).—Orient. Insects 6, 359370.
Starý, P. & Schmutterer, H. (1973). A review of aphid parasites (Hymenoptera: Aphidiidae) in Kenya.—Z. angew. Ent. 74, 351356.
Sunderland, K. D. (1975). The diet of some predatory arthropods in cereal crops.—J. appl. Ecol. 12, 507515.
Sunderland, K. D. & Vickerman, G. P. (1980). Aphid feeding by some polyphagous predators in relation to aphid density in cereal fields.—J. appl. Ecol. 17, 389396.
Vickerman, G. P. & Sunderland, K. D. (1975). Arthropods in cereal crops: nocturnal activity, vertical distribution and aphid predation.—J. appl. Ecol. 12, 755766.
Zadoks, J. C., Chang, T. T. & Konzak, C. F. (1974). A decimal code for the growth stages of cereals.—Weed Res. 14, 415421.

Related content

Powered by UNSILO

Natural enemies and their impact on Diuraphis noxia (Mordvilko) (Hemiptera: Aphididae) populations

  • Y. K. Aalbersberg (a1), M. C. Van Der Westhuizen (a2) and P. H. Hewitt (a2)


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.