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Incidence of yellows in sugar beet as affected by variation in plant density and arrangement

Published online by Cambridge University Press:  10 July 2009

G. R. Johnstone ,
T. B. Koen  and
H. L. Conley
G. R. Johnstone
Affiliation:
Department of Agriculture, G.P.O. Box 192B, Hobart, Tasmania, 7001
T. B. Koen
Affiliation:
Department of Agriculture, G.P.O. Box 192B, Hobart, Tasmania, 7001
H. L. Conley
Affiliation:
Department of Agriculture, G.P.O. Box 192B, Hobart, Tasmania, 7001
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Abstract

Aphid species found infesting sugar-beet in Tasmania were Aphis craccivora Koch, Aulacorthum solani (Kalt), Macrosiphum euphorbiae (Thos.) and Myzus persicae (Sulz.). The activity of infective alatae over plots of sugar-beet established by sowing at different densities and arrangements to produce 12 treatments was gauged by recording the numbers of plants which became affected with virus yellows symptoms. The incidence of yellows increased as plant density decreased and as plant arrangement altered from rectangular to more square patterns. A regression equation of the form: where a, b, c and d were constants and x and y the intra- and interrow spacings, respectively, accounted for 92% of the variation produced by the 12 treatments. These results indicate that the incidence of virus infection in row crops resulting from aphid flight activity may be manipulated through altering plant density and arrangement.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 72 , Issue 2 , June 1982 , pp. 289 - 294
Copyright
Copyright © Cambridge University Press 1982

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References

Anon. (1980). General purpose graphics system. CSIRO Division of Computing Research Manual no. 10. Canberra, CSIRO.Google Scholar
Anon. (1981). Investigations into the production of sugar beet 1978–79. Department of Agriculture Tasmanian Report. 67 pp.Google Scholar
A'brook, J. (1968). The effect of plant spacing on the numbers of aphids trapped over the groundnut crop.—Ann. appl. Biol. 61, 289–294.CrossRefGoogle Scholar
A'brook, J. (1973). The effect of plant spacing on the number of aphids trapped over cocksfoot and kale crops.—Ann. appl. Biol. 74, 279–285.CrossRefGoogle Scholar
Broadbent, L. (1964). Control of plant virus diseases.—pp. 330–364 in Corbett, M. K. & Sisler, H. D. (Eds.). Plant virology.—527 pp. Gainesville, University of Florida Press.Google Scholar
Frappell, B. D. (1979). Competition in vegetable crop communities.—J. Aust. Inst. agric. Sci. 45, 211–217.Google Scholar
Gregory, P. H. (1948). The multiple-infection transformation.—Ann. appl. Biol. 35, 412–417.CrossRefGoogle ScholarPubMed
Hughes, R. D., Carver, M., Casimir, M., O'loughlin, G. T. & Martyn, E. J. (1965). A comparison of the numbers and distribution of aphid species flying over eastern Australia in two successive years.—Aust. J. Zool. 13, 823–839.CrossRefGoogle Scholar
Johnstone, G. R. & Munro, D. (1980). Yellows of sugar beet caused by subterranean clover red leaf virus.—Australasian Plant Pathology 9 (3), 4–5.CrossRefGoogle Scholar
Knott, C., Palmer, G. M. & Mundy, E. J. (1976). The effect of row width and plant population on the yield of sugar beet grown on silt and black fen soil.—Exp. Agric. 31, 91–99.Google Scholar
Moericke, V. (1957). Der Flug von Insekten über pflanzenfreien und pflanzenbewachsenen Flächen.—Z. PflKrankh. PflPath. PflSchutz 64, 507–514.Google Scholar
Nichol, G. E., Burtch, L. M. & Traveller, D. J. (1969). Seed bed preparation, planting and thinning.—pp. 49–67 in Johnson, R. T., Alexander, J. T., Rush, G. E. & Hawkes, G. R. (Eds.). Advances in sugar beet production; principles and practises.—470 pp. Iowa State University Press.Google Scholar
Siegel, S. (1956). Nonparametric statistics for the behavioral sciences.—196 pp. New York, McGraw-Hill.Google Scholar
Smith, J. G. (1969). Some effects of crop background on populations of aphids and their natural enemies on brussels sprouts.—Ann. appl. Biol. 63, 326–330.CrossRefGoogle Scholar
Tolman, B. (1946). Population and distribution studies with sugar beets.—Proc. Amer. Soc. Sugar Beet Technology 4, 177–184.Google Scholar