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

  • P. Sivapalan (a1), A. A. C. Karunaratne (a1) and D. G. S. Jayatilleke (a1)

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.

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Danthanarayana, W. & Fernando, S. N. (1970). Biology and control of the live-wood termites of tea.—Tea Q. 41, 3452.
Jepson, F. P.. (1926). Some preliminary notes on tea termites.—Trop. Agriculturist 67, 6779.
Pinto, M. P. D. (1941). Some observations on the biology of the Ceylonese Calotermitidae.—Indian J. Ent. 3, 73105.
Sivapalan, P., Senaratne, K. A. D. W.. & Karunaratne, A. A. C. (1977). Observations on the occurrence and behaviour of live-wood termites (Glyptotermes dilatatus) in low-country tea fields.—PANS 23, 58.
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Bulletin of Entomological Research
  • ISSN: 0007-4853
  • EISSN: 1475-2670
  • URL: /core/journals/bulletin-of-entomological-research
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