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Item Investigations on toxic, antifeedant and repellent properties of the defensive secretion of Coridiusjanus (Hemiptera: Pentatomidae) and a synthetic mixture of its major volatile constituents(Journal of National Science Council of Sri Lanka, 1991) Pathiratne, A.; Gunawardene, N.E.; Liyanage, S. K. J.Item Effects of short term exposure to therapeutic levels of formalin on health status of fingerlings and sub adult stages of Nile tilapia, Oreochromisniloticus(Journal of National Science Foundation, Sri Lanka, 2005) Perera, H.A.C.C.; Pathiratne, A.Item Toxicity assessment of insecticides commonly used in rice pest management to the fry of common carp, Cyprinuscarpio, a food fish culturable in rice fields(Journal of Applied Ichthyology, 2005) de Mel, G.W.J.L.M.V.T.M.; Pathiratne, A.Item Toxicity of fenthion (Lebaycid) to tilapia, Oreochromismassambicus (Peters): effects on survival, growth and brain acetylcholinesterase activity(Journal of the National Science Foundation of Sri Lanka, 1999) Pathiratne, A.Item Toxicity of chlopyrifos and dimethoate to fingerlings of the Nile tilapia, Oreochromisniloticus: cholinesterase inhibition(Sri Lanka Journal of Aquatic Sciences, 1998) Pathiratne, A.; Athauda, P.Item Influence of temperatureand soil type on the toxicity of three pesticides to Eiseniaandrei(Chemosphere, 2009) de Silva, M.; Pathiratne, A.; Van Gestal, C.A.M.Expansion of agriculture in the tropics has increased the use of pesticides that may affect the soil ecosystems. Few studies so far determined the effects of pesticides in the tropics and tropical risk assessment therefore often relies on data from temperate conditions. Hence we compared the toxicity of chlorpyrifos, carbofuran and carbendazim to the earthworm Eisenia andrei at two different temperatures reflecting temperate and tropical conditions. The toxicity of the three pesticides in both conditions decreased in the order carbendazim > carbofuran > chlorpyrifos. For chlorpyrifos and carbofuran, but not for carbendazim, survival was more sensitive at the higher temperature, probably due to increased earthworm activity. Sub-lethal effects (reproduction and growth) however, varied inconsistently with temperature and soil types. We conclude that toxicity of pesticides in tropics may not be predicted from data generated under temperate conditions, even within the same species.