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Appropriate transformation for the population counts of citrus green scale, Coccus viridis (Green) (Coccidae, Homoptera)*

Published online by Cambridge University Press:  19 September 2011

P. L. Tandon  and
G. K. Veeresh
P. L. Tandon
Affiliation:
Indian Institute of Horticultural Research, Bangalore, India-560089
G. K. Veeresh
Affiliation:
Indian Institute of Horticultural Research, Bangalore, India-560089
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Abstract

Six transformations viz., , log[log (x + 2)] and log[log (x + k )] were tested for their efficiency in stabilizing variance of Coccus viridis (Green) population counts which followed negative binomial distribution. Only log[log(x + 2)] transformation was found effective in stabilizing variance. This is a new transformation proposed by the authors.

Résumé

Six transformations, á savoir, , log[log(x + 2)], et log[log(x + k)] ont été essayées pour leur efficacité concernant la stabilisation de variance des comptes de populations de Coccus viridis (Green), lequeles ont suivis une distributions binomiale negative. Seule la transformation log[log(x + 2)] s'est trouvée comme efficace pour stabiliser variance. C'est une nouvelle transformation proposée par les auteurs présents.

Keywords

TransformationsvarianceCoccus viridisnegative binomial distributionTransformationsvarianceCoccus viridisdistribution binomiale negative
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 8 , Issue 2 , April 1987 , pp. 255 - 257
Copyright
Copyright © ICIPE 1987

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References

REFERENCES

Anderson, F. S. (1965) The negative binomial distribution and the sampling of insect populations. Proc. XII Int. Congr. Ent., p. 395.Google Scholar
Anscombe, F. J. (1948) On estimating the population of aphids in a potato field. Annu. appl. Biol. 35, 567–571.CrossRefGoogle Scholar
Harcourt, D. G. (1963) Population dynamics of Leptinotarsa decemlineata (Say.) in eastern Ontario. 1 spatial pattern and transformation of field counts. Can. Entomologist 95, 813–820.Google Scholar
Hayman, B. I. and Lowe, A. D. (1961) The transformation of counts of the cabbage aphid (Brevicoryne brassicae L.). N.Z. J. Sci. 4, 271–278.Google Scholar
Iwao, S. and Kuno, E. (1971) An approach to the analysis of aggregation pattern in biological population. In Statistical Ecology, (Edited by Patil, G. P.et al.), Vol. 1, pp. 461–513. Penn. State University, University Park and London.Google Scholar
Kleczkowaskii, A. (1949) The transformation of local lesion counts for statistical Analysis. Annu. appl. Biol. 36, 139–152.CrossRefGoogle Scholar
Tandon, P. L. (1985) Spatial distribution, sampling technique and population dynamics of citrus green scale, Coccus viridis (Green) on mandarin, Ph.D. Thesis submitted to University of Agricultural Sciences, Bangalore.Google Scholar
Taylor, L. R. (1965) A natural law for the spatial disposition of insects. Proc. 11th Inter. Congr. Ent. (1964) pp. 396–397.Google Scholar