Pesticide standards and analytical methods of Chinese manufacturers evaluated, validated at JMPS and CIPAC meetings

21st JMPS Meeting and the 17th Joint CIPAC/FAO/WHO Open Meeting (66th CIPAC Meeting) held virtually due to COVID-19.      

Sixteen JMPS experts from FAO, WHO, Germany, France, the United Kingdom, Belgium, Australia, Switzerland, Canada, Greece, Singapore and China participated in the 21st JMPS Meeting from June 7 to 10, 2022. 

At the meeting, 32 pesticide standards were evaluated, including 17 pending product standards from the previous JMPS meeting, four new FAO standards, three WHO standards and eight Joint FAO/WHO standards. Among the 17 pending standards, eight were presented by Chinese pesticide manufacturers, accounting for 47%. The new FAO standards are filed for difenoconazole TC, EC and WDG; the renewal of existing standards covers ethephon TC, mother concentrate and SL, as well as mancozeb TC and WP. 

Chinese Zhejiang Eastlake Hi-Tech first proposed the renewal of existing standards. The first renewal of tebuconazole was revoked providing an opportunity for Chinese pesticide manufacturers to apply for renewal of the existing standards of tebuconazole. The preparation of FAO/WHO Manual on Development and Use for Microbial Pesticides has been completed, which will be published by the end of 2022.

The 17th Joint CIPAC/FAO/WHO Open Meeting (66th CIPAC Meeting) was held online from June 13 to 15, 2021, with participation of more than 100 CIPAC delegates including CIPAC members, correspondents, experts and industry representatives from more than 40 countries.

The CIPAC Technical Meeting evaluated the results of small and large-scale collaborative verification tests on new analytical methods for 12 active ingredients and formulations. Out of the 12 active ingredients and formulations, nine Chinese pesticide companies, accounting for 75%, which reveals the Chinese manufacturer’s increased capability to file for international standards and analytical methods. 

What has been evaluated and validated includes Eastlake Hi-Tech’s innovative ion chromatography for ethephon TC, mother concentrate and active ingredients in SL; Fengshan Group’s renewal of the analytical methods for the trifluralin TC and active ingredients in EC; Chengdu Newsun’s 14-Hydroxylated Brassinosteroid mother concentrate and SL as well as the sophocarpidine mother concentrate and the active ingredients in SL. Hence, the methods have become CIPAC’s provisional methods. 

Furthermore, what has been evaluated and validated include Shandong Binnong’s small-scale tests of the extension of the analytical methods of the active ingredients in the novel formulations of flumioxazin WG and SC as well as the renewal of CIPAC’s analytical methods of the active ingredients in metolachlor TC, EC and EW; the extension of the analytical methods of the active ingredients in the novel formulations of S-methoprene GR, GR-SB and CS, as organized by Shenyang Research Institute of Chemical Industry along with the small-scale tests of CIPAC analytical method of the active ingredients in S-methoprene TC; Tianjin Yorkool’s extension of the analytical method of pirimiphos-methyl in the long-lasting insecticide-treated bed nets. 

In addition, the MT 178.3 abrasion resistance and MT160.1 spontaneity of dispersion of suspension concentrate organized by the German PAC (DAPA/DAPF) have been validated, which will supersede the MT178, MT178.1 and MT160 methods.