Hostname: page-component-745bb68f8f-l4dxg Total loading time: 0 Render date: 2025-01-27T04:48:09.825Z Has data issue: false hasContentIssue false
  • English
  • Français

Population dynamics of Xyleborus fornicatus Eichhoff (Coleoptera: Scoly-tidae) in relation to yield trends in tea

Published online by Cambridge University Press:  10 July 2009

P. Sivapalan
P. Sivapalan
Affiliation:
Tea Research Institute of Sri Lanka, Talawakelle, Sri Lanka.
Get access Rights & Permissions [Opens in a new window]

Abstract

A highly significant negative linear correlation (r=– 0·911, P=0·001) was observed between Xyleborus fornicatus Eichh. population levels in tea plants and the crop size in the preceding month. A highly significant negative linear correlation (r=– 0·858, P=0·001) was also observed between Xyleborus population levels and the percentage of healed galleries of the respective samples. Cambial activity, which has a direct relationship with crop size, determines the rate of healing of brood galleries, and this seems to be the critical factor that regulates population size within a pruning cycle. Since the population has an inverse relationship to crop size and as the latter could be predicted in advance using weather parameters, it should be possible to predict population levels of Xyleborus in advance.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 67 , Issue 2 , June 1977 , pp. 329 - 335
Copyright
Copyright © Cambridge University Press 1977

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

Calnaido, D.. (1965). The flight and dispersal of shot-hole borer of tea (Xyleborus fornicatus Eichh., Coleoptera: Scolytidae). — Entomologia exp. appl. 8, 249–262.CrossRefGoogle Scholar
Cranham, J. E.. (1961). The chemical control of shot-hole borer (Xyleborus fornicatus Eichh.) on tea. — Tea Q. 32, 171–184.Google Scholar
Cranham, J. E.. (1963). Shot-hole borer: biology and control. Notes for planters, 1963. —Tea Q. 34, 127–143.Google Scholar
Danthanarayana, W.. (1967). Tea entomology in perspective. — Tea Q. 38, 153–177.Google Scholar
Danthanarayana, W.., Fernando, S. N., Shanmugam, C.. (1968). Recent developments in research on shot-hole borer control. — Tea Q. 39, 94–114.Google Scholar
Devanathan, M. A. V.. (1975). Weather and the yield of a crop. — Expl Agric. 11, 183–186.CrossRefGoogle Scholar
Gadd, C. H.. (1941). The life-history of the shot-hole borer of tea. — Tea Q. 14, 5–22.Google Scholar
Gadd, C. H. (1949). Studies of shot-hole borer of tea. V.Borer population. — Tea Q. 20, 66–76.Google Scholar
Judenko, E.. (1958)a.Trials with a method of assessment of infestations caused by shot-hole borer (Xyleborus fornicatus Eich.) on old tea. — Tea Q. 29, 51–59.Google Scholar
Judenko, E.. (1958b). The appearance of adult shot-hole borers (Xyleborus fornicatus Eich.) outside their galleries under natural conditions. — Tea Q. 29, 104–111.Google Scholar
Sivapalan, P.. (1975).The dispersion of brood galleries of Xyleborus fornicatus Eichh. (Coleoptera, Scolytidae) in tea plants. — Bull. ent. Res. 65, 501–506.CrossRefGoogle Scholar
Wickremasinghe, R. L.., Perera, B. P. M., Perera, K. P. W. C. (1976).α-spinasterol temperature and moisture content as determining factors in the infestation of Camellia sinensis by Xyleborus fornicatus. — Biochem. Systematics. 4, 103–110.CrossRefGoogle Scholar