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- Title
Effects of Biochar on Three Pesticide Residues in Flue-cured Tobacco.
- Authors
DAI Kuai; LI Jiangzhou; PU Tianyan; JI Sigui; ZHANG Limeng; ZHANG Lu; DUAN Shuhui; MENG Jun; ZHANG Cuiping; FAN Miaomiao
- Abstract
In order to investigate the effects of biochar on residue of pesticides frequently used in flue-cured tobacco, the effects of exogenous biochar on pesticide residues of α-cypermethrin, metalaxyl and rimsulfuron in tobacco leaves and its planting soil were studied by field experiments. The results showed that the contents of α-cypermethrin, metalaxyl and rimsulfuron in tobacco leaves with biochar application were decreased by 25. 63%, 57. 10% and 39.84%, respectively, after treated for 10 d, compared to the corresponding control. The metalaxyl level at 10 d after pesticides application was below the maximum residue limit standard, and α-cypermethrin and rimsulfuron levels in tobacco leaves with biochar application were reduced bellow the maximum residue limit standard at 40 d after treatment. At 10 d after pesticides treated, the contents of α-cypermethrin, metalaxyl and rimsulfuron in soil treated with biochar increased by 176.23%, 115.05% and 23.28%, respectively, compared with the corresponding control. In conclusion, biochar could significantly reduce the residues of α-cypermethrin, metalaxyl and rimsulfuron in tobacco leaves, and could shorten the safe interval of the 3 pesticides application in flue-cured tobacco. Moreover, biochar application significantly increased the residues of the 3 pesticides in soils. The results provided a theoretical basis for the application of biochar to control pesticide residues in crops.
- Subjects
PESTICIDE residues in food; PESTICIDE pollution; CYPERMETHRIN; BIOCHAR; CROP residues; TOBACCO; RIMSULFURON
- Publication
Journal of Agricultural Science & Technology (1008-0864), 2019, Vol 21, Issue 8, p99
- ISSN
1008-0864
- Publication type
Article
- DOI
10.13304/j.nykjdb.2019.0593