THE United States Environment
Protection Agency has a four-day testing
period to evaluate a pesticide's safety.
A team studied the effect of the pesticide
endosulfan. They concluded the
four-day period is inadequate. It is the
pesticide's impact after the four days
that one should be worried about.
Endosulfan disrupts hormone functions and is banned in 60 countries. It is yet to be banned in India. A single dose between 1.3 ppb to 120 ppb can kill half the population exposed to it. USEPA classifies this range as highly toxic to very highly toxic. The team from the University of Pittsburg, USA, exposed tadpoles of nine frog species to a single dose of endosulfan. The findings, in the September issue of Environmental Toxicology and Chemistry, proved that the USEPA classification should be reset.
|97 per cent of the leopard
frogs died after they were
transferred to clean water
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