Fensulfothion

Fensulfothion is an organophosphorus compound with the formula CH2S(O)C6H4OP(S)(OC2H5)2. It is an insecticide and nematicide that acts by inhibiting the enzyme acetylcholinesterase. Chemically, it is classified as a thiophosphate. It is widely used on corn, onions, rutabagas, pineapple, bananas, sugar cane, sugar beets, pea nuts, etc.

Safety
It is highly toxic and listed as an extremely hazardous substance.