WARNING! Do not consume any tea from the Chinese mainland
On July 7, July 1, 2015, in Beijing , packaged teas on the shelves of supermarkets were found to contain high remnants of tetradiphon (tetradifon, tedion), a severely toxic insecticide. In June, 2015, in the city of Wuhan, similarly contaminated teas were found. In May, 2015, a “zhi fu tea” produced in Fujian province was found to contain remnants of tetradiphon. In March, 2015, in Jinan, Shandong province, Oolong tea sold there was found to contain remnants of tetradiphon. Recently, jasmine tea sold in Anhui province was found to contain 2.28 mg/kg.
On January 1, 2004, the legal limit of remnant tetradiphon must be less than 0.1 mg/kg. In May, 2014, the last producer of tetradiphon, the Yang Nong company of Jiangsu province announced it is terminating production of tetradiphon. However, on July 27, 2015, tetradiphon was still available for purchase on the open market.
Tetradiphon was banned on the Chinese mainland since June, 1997.
[Master Chen says]
This means that this toxic insecticide tetradiphon is still being used and sprayed on tea trees in Fujian and other tea producing provinces.