Ref ID : 6097
Surendar Kumar, Rup Lal, and Pradeep Bhatnagar; The Effects of Dieldrin, Dimethoate and Permethrin on Tetrahymena pyriformis. Environmental Pollution 57:275-280, 1989
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The effects of three insecticides, dieldrin, dimethoate and permethrin, on the growth of a holotrichous ciliate, Tetrahymena pyriformis, were studied for 5 days. The ciliate was very sensitive to dieldrin and dimethoate. Both these insecticides produced approximately 81% and 84% inhibitions of growth within two days. Dieldrin caused rounding of cells, while dimethoate induced cell lysis. Dimethoate also triggered a general mucocyst discharge. Of the three insecticides, permethrin was the least toxic and induced no morphological alterations.