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Clonal susceptibility and the influence of shade trees on the incidence of Glyptotermes dilatatus (Bugnion & Popoff) (Isoptera: Kalotermitidae) in tea

Published online by Cambridge University Press:  10 July 2009

P. Sivapalan ,
A. A. C. Karunaratne  and
D. G. S. Jayatilleke
P. Sivapalan
Affiliation:
Tea Research Institute of Sri Lanka, Talawakelle, Sri Lanka
A. A. C. Karunaratne
Affiliation:
Tea Research Institute of Sri Lanka, Talawakelle, Sri Lanka
D. G. S. Jayatilleke
Affiliation:
Tea Research Institute of Sri Lanka, Talawakelle, Sri Lanka
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Abstract

Amongst 20 tea clones tested in Sri Lanka for susceptibility to Glyptotermes dilatatus (Bugnion & Popoff), five of the high-yielding soft-wooded clones, including the currently recommended and popular TRI 2023 and TRI 2026, were found very susceptible and to suffer a severe net loss in yield. A highly significant negative linear correlation was observed between the mean infestation percentage of clone with an infestation of over 30% and the mean percentage change in yield. In general, the high-yielding clones with soft-wooded sappy frames were particularly susceptible to termite attack. Since yield is one of the important criteria for selection, it is suggested that in areas prone to termite infestation, replanting should be limited to the high-yielding resistant clones such as GMT 9, KEN 16/3 and DG 39. The provision of shade with Gliricidia sepium may have prevented a steep increase in the incidence of infestation in the susceptible clones.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 70 , Issue 1 , March 1980 , pp. 145 - 149
Copyright
Copyright © Cambridge University Press 1980

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References

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