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Characteristics on the Conversion of EBDCs Fungicides to ETU for Mancozeb and Metiram  

Jang, Mi-Ra (Gangnam Agro-marin Products Inspection Center, Seoul Metropolitan Government Research Institute of Public Health and Environment)
Hwang, Kwang-Eun (Gangnam Agro-marin Products Inspection Center, Seoul Metropolitan Government Research Institute of Public Health and Environment)
Lee, Eun-Soon (Gangnam Agro-marin Products Inspection Center, Seoul Metropolitan Government Research Institute of Public Health and Environment)
Kim, Eun-Hee (Gangnam Agro-marin Products Inspection Center, Seoul Metropolitan Government Research Institute of Public Health and Environment)
Kim, Dong-Hyun (Gangnam Agro-marin Products Inspection Center, Seoul Metropolitan Government Research Institute of Public Health and Environment)
KIm, Jung-Hun (Gangnam Agro-marin Products Inspection Center, Seoul Metropolitan Government Research Institute of Public Health and Environment)
Park, Seog-Gee (Gangnam Agro-marin Products Inspection Center, Seoul Metropolitan Government Research Institute of Public Health and Environment)
Publication Information
The Korean Journal of Pesticide Science / v.14, no.1, 2010 , pp. 30-36 More about this Journal
Abstract
This study was conducted to investigate the characteristics of conversion and residue for two EBDCs fungicides (mancozeb and metiram) and their metabolite, ethylenethiourea (ETU) under laboratory conditions. The sampling on the pesticides was done at 0, 1, 2, 5, 7, 9, 12, 15, 19, 22 and 26 days. The amounts of their residues and ETU were analyzed with an HPLC-DAD. The average recoveries were $86.9{\pm}4.3\;and\;90.2{\pm}8.0%$ for mancozeb, $85.2{\pm}2.4\;and\;98.6{\pm}1.6%$ for metiram, and $64.1{\pm}3.4\;and\;80.0{\pm}4.6%$ for ETU. The half-lives of mancozeb and metiram were 7.5 and 27.8 day, respectively. The conversion rates of mancozeb and metiram to ETU ranged from 4.7 to 67.2% and from 7.5 to 34.6%, respectively. These results may be different under the real environmental conditions. Therefore, following many studies are recommended to make the criteria for applying the use and safety for mancozeb and metiram.
Keywords
Mancozeb; Metiram; Ethylenethiourea; Half-life;
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