Prothiofos is a non-systemic insecticide and belongs to the group of organophosphates. It is an acetylcholinesterase (AChE) inhibitor causing hyperexcitation and impedes the functioning of the nervous system. Prothiofos gets activated by contact and ingestion and is used to control caterpillars Pseudococcus spp. thrips cockchafer larvae cutworms etc. in vegetables fruit maize sugar cane sugar beets tea tobacco and ornamentals. According to the Commission Implementing Regulation (EU) No 2076/2002 of 20th November 2002 prothiofos is not approved for use in the European Union (EU) as a plant protection agent following Regulation (EC) No. 1107/2009. But a default maximum residue limit of 0,01 mg/kg is applicable for the presence of prothiofos in products of plant and animal origin according to Art 18(1)(b) Reg 396/2005.