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  • Title: Dissipation and residues of myclobutanil in tobacco and soil under field conditions.
    Author: Wang X, Li Y, Xu G, Sun H, Xu J, Zheng X, Wang F.
    Journal: Bull Environ Contam Toxicol; 2012 May; 88(5):759-63. PubMed ID: 22415649.
    Abstract:
    Field experiments were conducted in two different locations to determine the dissipation pattern and residue levels of myclobutanil in tobacco leaves and soil. Myclobutanil 12.5 % microemulsion (ME) formulation was sprayed once at 3.0 mL/ha, and the residues in green tobacco leaves dissipated to more than 50 % of the initial deposits 5 days after application and up to above 90 % after 21 days. The dissipation rate of myclobutanil in soil was lower than that in green tobacco leaves. The residues dissipated above 50 % of the initial deposits 7 days after treatment and dissipated about 90 % after 42 days. The calculated half-life values (T (1/2)) were found to be 4.89-6.77 days in green tobacco leaves and 12.88-19.20 days in soil, respectively. The ultimate residues of myclobutanil in flue-cured tobacco leaves and soil were determined after the third and fourth applications at levels of 2.0 and 3.0 mL/ha. Myclobutanil residues in cured tobacco leaves 21 days after the last treatment ranged from 0.85 to 3.27 mg/kg. Meanwhile, the residues detected in soil reached below 0.045 mg/kg 21 days after the last treatment.
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