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Control of the live-wood tea termite Glyptotermes dilatatus using Heterorhabditis sp. (Nemat.)


, : Control of the live-wood tea termite Glyptotermes dilatatus using Heterorhabditis sp. (Nemat.). Agriculture Ecosystems and Environment, 194: 333-342

Glyptotermes dilatatus is the main pest of the lowland-grown tea in Sri Lanka, affecting some 42,000 ha. Infested bushes suffer debilitation of their structure, loss of yield and death. The concealed habit of Glyptotermes and its social organization makes it difficult to control by chemical, classical biological and other conventional methods. It was recently found that the nematode Heterorhabditis sp. (isolated in Darwin, Australia, and mass-produced by CSIRO entomologists) infests Glyptotermes and is able to kill the termite and breed in the cadaver both in the laboratory (22.degree. C; 100% relative humidity) and under extreme climatic conditions experienced in the field (mean temp.: 28.3.degree. C; range, 19.5-38.4.degree. C; only 7 days low rainfall between 20 December 1981 and 28 February 1982). Within each cadaver, up to about 3500 juveniles were produced which are able to infect healthy termites in the laboratory as well as in the field, creating a chain of infection that leads to complete annihilation of a colony. In the laboratory, the dosage mortality equation predicted an LD50 of 3670 .+-. 564 worms/ml, suggesting that a very high rate of application is needed to obtain 99.9% kill. In the field, experimental application of infectives at rates of 4000 and 8000 worms/ml in doses of 40 and 30 ml per bush, respectively, gave complete control within 60-95 days. The cost of control is US$2.39 (50.20 Sri Lankan rupees) per 1000 infected bushes (1987 values).

Accession: 001554817

DOI: 10.1016/0167-8809(87)90060-0

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Related references

Danthanarayana W.; Vitarana S.I., 1987: Control of the live wood tea termite glyptotermes dilatatus using heterorhabditis sp nematoda. Glyptotermes dilatatus is the main pest of the lowland-grown tea in Sri Lanka, affecting some 42,000 ha. Infested bushes suffer debilitation of their structure, loss of yield and death. The concealed habit of Glyptotermes and its social organizati...

Senanayake, P.D.; Mohotti, K.; Paranagama, P.A., 2015: Bioactive constituents of wood rot extract of tea, Camellia sinensis L.O. Kuntze against alates of low country live wood termite Glyptotermes dilatatus Bugnion and Popoff (Isoptera: Kalotermitidae). Low country live wood termite (LCLWT), Glyptotermes dilatatus is attractive to rotted stumps of tea plant, Camellia sinensis. Rotted stumps are formed due to the attack of wood rot fungi in pruned stems. The objective of the present study was to i...

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Sivapalan P.; Senaratne K.A.D.W.; Karunaratne A.A.C., 1977: Observations on the occurrence and behavior of live wood termites glyptotermes dilatatus in low country tea fields. PANS (Pest Articles & News Summaries) 23(1): 5-8

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Sivapalan, P.; Senaratne, KADW.; Karunaratne, AAC., 1981: Observations on the occurrence and behaviour of live wood termites (Glyptotermes dilatatus) in low-country tea fields. Tea Quarterly, 501: 26-29

Sivapalan, P.S.naratne, K.1; Karunaratne, A., 1981: Observations on the occurrence and behaviour of live-wood termites (Glyptotermes dilatatus) in low-country tea fields Sri Lanka, Pest in seedling tea. Tea quarterly Tea Research Institute of Sri Lanka 50(1): 26-29

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D As, G.M.; B.B., 1965: Control of Microcerotermes, a termite attacking live wood of tea. Sanitation measures and treatment with aldrin or dieldrin, which is described in detail, are recommended for control.