Snails, eradication

Triphenyl- and tributyltin compounds have strongly biocidal properties and are employed in some agricultural fungicides and wood preservatives42. Other possible applications include disinfectants for use in hospitals and for the eradication of snails that transmit bilharzia. However, these compounds are potentially hazardous because of the ease with which they inhibit oxidative phosphorylation in man. Oral administration of diethyltin diiodide as a treatment for boils led to many deaths43. ... 

Chlorophenols have been widely used for a variety of pesticidal applications. Chlorophenols and their sodium salts have been primarily used for wood preservation and as chemical intermediates in the manufacture of other pesticides or chemicals. In China, sodium pentachlorophenate (Na-PCP) was especially used to eradicate snails, Oncomelania hupensis, in the schistosomiasis area in China. Chinese commercial PCP or Na-PCP contained appreciable amounts of PCDD/Fs, and their concentrations in PCP and Na-PCP were 142 and 92 ng I-TEQ g-1, respectively (Bao et al., 1995). 

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