Abstract: Chlorothalonil (CTN) is abroad-spectrum, protective organic chlorine bactericide, commonly used to control fungus diseases of vegetable, fruit, peanuts, rice, wheat and other crop. For its hazards to environment and human health, determination of CTN residue has attracted increasing attention of people. The physical and chemical properties, application and detection methods of CTN are reviewed here, in order to provide some reference for further development of CTN detection methods.

Key words: chlorothalonil(CTN), toxicity, residue determination