Persistence and Metabolism of Mancozeb in Pearl Millet

Persistence and metabolism of mancozeb in pearl millet grains were studied following foliar application of Ridomil MZ at the dose of 720 and 1440 g a.i. ha⁻¹. The residue levels reached to half of the initial deposits after 2.38 and 4.33 d at normal and double dose treatments, respectively, with waiting periods of 1 and 7 days. Ethylenethiourea, the carcinogenic metabolite of mancozeb appeared in grains within one d of final application and became non-detectable within 15 days. The harvest samples did not show any detectable residues of mancozeb and its metabolites.