Correlation between Size of Females of White Peach Scale Pseudaulacaspis pentagona (Targioni Tozzetti) (Hemiptera: Diaspididae) from Overwintering Generation and the Quantity of Generated Oocytes in Their Egg Tubes on Prunus persica var. nectarina
Keywords:
correlations; Pseudaulacspis pentagonaAbstract
Analysis of the results of mathematical processing of experimental data obtained shows that there is no clear correlation between size of females of Pseudaulacaspis pentagona from overwintering generation and the quantity of generated oocytes in their egg tubes. As a major argument in support of both foregoing statement outlining analytical results obtained for the Pearson correlation coefficient Rxy measurements as follows – 0.14; 0.09; 0.28. The obtained values for the Pearson correlation coefficient Rxy are extremely low according to both empirical standard scales. This shows that if correlation exists, it is slight and would rather random nature.
References
Съйкова, И. 1981. Статистически анализ на връзки и зависимости. Наука и изкуство, София, 446 с.
Шмойловой, Р. 2002. Общая теория статистики. Фи нансы и Статистика, М., 560 с.
Ферстер, Б. 1983. Mетоды корреляционного и ре грессионного анализа. Финансы и статистика, М., 302 с.
Davidson, J. A., Miller, D. R. and S. Nakahara. 1983. The white peach scale, Pseudaulacaspis pentagona (Targio ni-Tozzetti) (Homoptera: Diaspididae): evidence that current concepts include two species. Proceedings of the Entomo logical Society of Washington, 85: 753-761
Kosztarab, M. and F. Kozár. 1988. Scale insects of Cen tral Europe. Akademiai Kaido, Budapest, Hungary, 456 p.
Kosztarab, M. 1990. Economic importance. (p. 307 311). In D. Rosen, ed., Armored scale insects, Vol. 4B. El sevier, Amsterdam, The Netherlands
Kuitert, L. C. 1967. Observations on the biology bion omics and control of white peach scale, Pseudaulacaspis pentagona (Targ.). Proceedings of the Florida State Horticul tural Society 80: 376-381
Longo, S., Marotta, S., Pellizzari, G., Russo, A. and A. Tranfaglia. 1995. An annotated list of the scale insects (Ho moptera: Coccoidea) of Italy. Israel Journal of Entomology, 29: 113-130
Scale Net. 2011. A Database of the Scale Insects of the World. Available from: http://www.sel.barc.usda.gov/sca lenet.htm. (last accessed feb. 2011).
Theil, H. 2007. Principles of Econometrics. John Wiley & Sons. Ltd, New York, 576 p.
Watson, G. W. 2002. Arthropods of economic impor tance: Diaspididae of the world. An illustrated identification guide and information source. CD-ROM. Expert Center for Taxonomic Identification (ETI), University of Amsterdam, The Netherlands. ISBN No. 90-75000-48-0.
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