Hostname: page-component-76fb5796d-wq484 Total loading time: 0 Render date: 2024-04-25T10:04:23.091Z Has data issue: false hasContentIssue false
  • English
  • Français

Relating Incidence of Icerya Pattersoni Newst (Homoptera: Margorodidae) to Characteristics of Veins of Coffee Leaves

Published online by Cambridge University Press:  19 September 2011

F. M. E. Wanjala  and
M. W. Kinuthia
F. M. E. Wanjala
Affiliation:
Coffee Research Foundation, P. O. Box 4, Ruiru, Kenya
M. W. Kinuthia
Affiliation:
Coffee Research Foundation, P. O. Box 4, Ruiru, Kenya
Get access

Abstract

Correlations were established between an endemic infestation of the coffee margorodid, Icerya pattersoni Newst and the characteristics of the veins of the leaves it infested in four coffee species in Kenya. The attack was variable between species although there was an affinity for it to be confined to midribs of definite length and thickness and laminal veins of quantifiable dimensions.

Résumé

Les corrélations ont été établies entre les infestations endémiques de Icerya pattersoni sur le cafeier et les charactéristiques des veines des foliares de quatres espèces de cafeier au Kenya. L'attaque a ètè variable entre les espèces bien qu'il y a eu une affinité en se limitant à la veine principale de longueur et d'épaisseur determinées. Les veines secondaires ont été affectés sur des dimensions quantifiables.

Keywords

Icerya pattersonilaminal veinscoffee species
Type
Articles
Information
International Journal of Tropical Insect Science , Volume 12 , Issue 1-2-3: Current Topics in Tropical Entomology , June 1991 , pp. 153 - 157
Copyright
Copyright © ICIPE 1991

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Anonymous (1986) The control of the fried egg scale and cottony scale in coffee in Kenya. Coffee Research Foundation Technical Circular No. 67.Google Scholar
Cilliers, C. J. (1976) Citrus pests in the Republic of South Africa. Australian bug, lcerya purchasi (Maskell) (Homoptera: Margorodidae). Sci. Bull. 391, 85–87.Google Scholar
Dahms, R. G. (1972) Techniques in the evaluation and development of host-plant resistance. J. Environ. Qual. 1, 254–259.CrossRefGoogle Scholar
Dethier, V. G. (1970) Chemical interaction between plants and insects. In Chemical Ecology (Edited by Sondheiner, E. and Simeone, J. B.), pp. 83–103. Academic Press Inc., New York.CrossRefGoogle Scholar
Gibson, R. W. (1972) The distribution of aphids on potato leaves in relation to vein size. Entomol. Exp. Appl. 15, 213–223.CrossRefGoogle Scholar
Kairo, M. T. K., Murphy, S. T. and Pijls, J. W. A. M. (1987) Second Report on the Coffee Margorodid Project. CAB International Institute of Biological Control, Kenya Station.Google Scholar
Kinuthia, M. W. (1986) Studies on the biology of Icerya pattersoni (Homoptera: Margorodidae), a coffee pest in Kenya. M.Sc. Dissertation, University of Nairobi, Nairobi.Google Scholar
Kinuthia, M. W. and Mwangi, R. W. (1988) Growth, development and life cycle of Icerya pattersoni (Newstead) (Homoptera: Margorodidae), a coffee pest in Kenya. Insect Sci. Applic. 9, 69–72.Google Scholar
Le Pelley, R. H. (1968) Pests of Coffee. Longmans, London.Google Scholar
Schmutterer, R. (1969) Pest of Crops in North-East and Central Africa. Gustav. Fischer Verlag, Portland, USA.Google Scholar
Wanjala, F. M. E., Kinuthia, M. W., Mwangi, S. N. and Dooso, B. S. (1986a) Incidence of Icerya pattersoni Newst in Kenya. Trop. Pest Manage. 32, 169–170.CrossRefGoogle Scholar
Wanjala, F. M. E. (1986b) The soft scale insect of the genus Icerya (Homoptera: Margorodidae) infesting coffee in Kenya. Kenya Coffee Bull. 51, 86–88.Google Scholar