Dissipation and Residues of Myclobutanil in Tobacco and Soil Under Field Conditions

作者：Wang Xiuguo; Li Yiqiang^*; Xu Guangjun; Sun Huiqing; Xu JinLi; Zheng Xiao; Wang Fenglong

来源：Bulletin of Environmental Contamination and Toxicology, 2012, 88(5): 759-763.

DOI：10.1007/s00128-012-0596-9

• Myclobutanil
• Tobacco
• Residue
• Dissipation

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.

• 出版日期2012-5
• 单位中国农业科学院