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 laminai 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 déterminées. Les veines secondaires ont été affectés sur des dimensions quantifiables.
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References
Anonymous (1986) The control of the fried egg scale and cottony scale in coffee in Kenya. Coffee Research Foundation Technical Circular No. 67.
Cilliers C. J. (1976) Citrus pests in the Republic of South Africa. Australian bug, Icerya purchasi (Maskell) (Homoptera: Margorodidae). Sci. Bull. 391, 85–87.
Dahms R. G. (1972) Techniques in the evaluation and development of host-plant resistance. J. Environ. Qual. 1, 254–259.
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.
Gibson R. W. (1972) The distribution of aphids on potato leaves in relation to vein size. Entomol. Exp. Appi. 15, 213–223.
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.
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.
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.
Le Pelley R. H. (1968) Pests of Coffee. Longmans, London.
Schmutterer R. (1969) Pest of Crops in North-East and Central Africa. Gustav. Fischer Verlag, Portland, USA.
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.
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.
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Wanjala, F.M.E., Kinuthia, M.W. Relating Incidence of Icerya Pattersoni Newst (Homoptera: Margorodidae) to Characteristics of Veins of Coffee Leaves. Int J Trop Insect Sci 12, 153–157 (1991). https://doi.org/10.1017/S1742758400020634
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DOI: https://doi.org/10.1017/S1742758400020634