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The extraction, distribution and sampling of the eggs of the sugar-cane froghopper, Aeneolamia varia saccharina (Dist.) (Homoptera, Cercopidae)

Published online by Cambridge University Press:  10 July 2009

A. B. S. King
A. B. S. King
Affiliation:
Caroni Research Station, Carapichaima, Trinidad, West Indies
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Abstract

The eggs of Aeneolamia varia saccharina (Dist.) were separated from samples of cane-field soils by means of a rotary sieve, hydrogen peroxide treatment and flotation; this method gave 76% extraction. Absolute population estimates of eggs were obtained from samples of soil (one-eighth of a cane stool) scraped from between the stems of 10 or 25 sugar-cane stools per field, the 25 pooled to give five sample groups. Relative population estimates, which took less time, were obtained from 20-g scoops of soil from between the stems of 25 stools, giving one composite sample. Taylor's power law was used to show that eggs were strongly aggregated in the dry season but less so in the wet season. The numbers of samples or sample groups needed for given levels of error were calculated from the indices of aggregation. Absolute and relative estimates of egg density were generally well correlated. The quicker relative method, suitably replicated and standardised, was considered suitable for extensive and intensive sampling.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 65 , Issue 1 , March 1975 , pp. 157 - 164
Copyright
Copyright © Cambridge University Press 1975

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References

Evans, D. E. (1972). The spatial distribution and sampling of Aeneolamia varia saccharina and A. postica jugata (Homoptera: Cercopidae).—Entomologia exp. appl. 15, 305–318.CrossRefGoogle Scholar
Fewkes, D. W. (1960). Entomology.—Rep. Caroni and Ste Madeleine Sug. Co. cent, agric. Res. Stn, Trinidad 1959–1960, 155–178.Google Scholar
Fewkes, D. W. (1961). Stool size as a factor in the sampling of sugarcane froghopper nymph populations.—J. econ. Ent. 54, 771–772.CrossRefGoogle Scholar
Fewkes, D. W. & Buxo, D. A. (1965). Entomology.—Rep. Tate and Lyle cent. agric. Res. Stn, Trinidad 1964, 12–120.Google Scholar
Hardy, F. & Rodriguez, G. (1930). Progress report.—Minut. Proc. Froghopper Invest. Comm. 3, 132–144.Google Scholar
Hardy, F. & Urich, F. W. (1931). Progress Report.—Minut. Proc. Froghopper Invest. Comm. 3, 198–211.Google Scholar
Horsfall, W. R. (1956). A method for making a survey of floodwater mosquitoes.—Mosquito News 16, 66–71.Google Scholar
Morris, R. F. (1955). The development of sampling techniques for forest insect defoliators, with particular reference to the spruce budworm.—Can. J. Zool. 33, 225–294.CrossRefGoogle Scholar
Pickles, A. (1930). Notes on biological studies on the froghopper during the dry season, 1930.—Minut. Proc. Froghopper Invest. Comm. 3, 150–157.Google Scholar
Pickles, A. (1931). On the oviposition of Tomaspis saccharina Dist. (Rhynch., Cercop.), an insect pest of sugar-cane in Trinidad.—Bull. ent. Res. 22, 461–468.CrossRefGoogle Scholar
Pickles, A. (1933). Entomological contributions to the study of the sugar-cane froghopper. II.—The influence of host relations and of cultural operations in limiting blight incidence amongst plant canes.—Trop. Agric, Trin. 10, 240–245, 286–295.Google Scholar
Pickles, A. (1946). Estimation of the number of froghopper eggs in cane-field soil.—Proc. agric. Soc. Trin. 46, 75–83.Google Scholar
Pickles, A. & Robinson, C. K. (1932). Progress Report.—Proc. Sug. Cane Invest. Comm. Trin. 4, 5–12.Google Scholar
Salt, G. & Hollick, F. S. J. (1944). Studies of wireworm populations. I. A census of wire-worms in pasture.—Ann. appl. Biol. 31, 52–64.CrossRefGoogle Scholar
Southwood, T. R. E. (1966). Ecological methods with particular reference to the study of insect populations.—391 pp. London, Methuen.Google Scholar
Taylor, L. R. (1961). Aggregation, variance and the mean.—Nature, Lond. 189, 732–735.CrossRefGoogle Scholar
Taylor, L. R. (1965). A natural law for the spatial disposition of insects.— Int. Congr. Ent. XII, 396–397.Google Scholar