Washing fresh tea leaves before picking decreases pesticide residues in tea.
dissipation
insecticides
penetration
removal rate
Journal
Journal of the science of food and agriculture
ISSN: 1097-0010
Titre abrégé: J Sci Food Agric
Pays: England
ID NLM: 0376334
Informations de publication
Date de publication:
Oct 2020
Oct 2020
Historique:
received:
25
03
2020
revised:
23
05
2020
accepted:
30
05
2020
pubmed:
31
5
2020
medline:
4
2
2021
entrez:
31
5
2020
Statut:
ppublish
Résumé
The use of pesticides during tea plant cultivation helps agricultural production and prevents and controls pests, diseases and weeds. It is of the utmost importance to balance pesticide application with tea quality, safety and consumer health. The uptake of pesticides into plants may lead to the presence of residues that are hazardous to human health, especially for some foliar-applied insecticides. The movability or penetration behavior of a pesticide remains unknown after it has been sprayed on a tea leaf. Two organophosphate (acephate, trichlorfon) and three neonicotinoid pesticides (imidacloprid, thiamethoxam and acetamiprid) were confirmed with respect to their removal from the treated fresh leaves of tea saplings via washing in a phytotron. Four of the targets have little penetrative ability into tea leaves, mainly existing (> 92%) on the tea leaf surface, except for trichlorfon (> 70%), for 30 days. With higher vapor pressures, trichlorfon and acetamiprid had relatively higher penetration ratios of 8.63-29.60% and 0.28-8.03% respectively. Two organophosphate insecticides were found to degrade more quickly, with lower final amounts of residues on and in the whole leaf compared to the neonicotinoid pesticides. In a field test, these residues could be reduced by 45-72% after a pre-harvest interval of 3 days, and by 16-89% after 7 days, when the fresh tea shoots were sprayed with 2 or 4 L m Pesticides with different structures have different penetration abilities on the tea leaf surface, and some pesticides in commercial tea can be reduced by spraying with water before fresh leaves are picked. © 2020 Society of Chemical Industry.
Sections du résumé
BACKGROUND
BACKGROUND
The use of pesticides during tea plant cultivation helps agricultural production and prevents and controls pests, diseases and weeds. It is of the utmost importance to balance pesticide application with tea quality, safety and consumer health. The uptake of pesticides into plants may lead to the presence of residues that are hazardous to human health, especially for some foliar-applied insecticides. The movability or penetration behavior of a pesticide remains unknown after it has been sprayed on a tea leaf.
RESULTS
RESULTS
Two organophosphate (acephate, trichlorfon) and three neonicotinoid pesticides (imidacloprid, thiamethoxam and acetamiprid) were confirmed with respect to their removal from the treated fresh leaves of tea saplings via washing in a phytotron. Four of the targets have little penetrative ability into tea leaves, mainly existing (> 92%) on the tea leaf surface, except for trichlorfon (> 70%), for 30 days. With higher vapor pressures, trichlorfon and acetamiprid had relatively higher penetration ratios of 8.63-29.60% and 0.28-8.03% respectively. Two organophosphate insecticides were found to degrade more quickly, with lower final amounts of residues on and in the whole leaf compared to the neonicotinoid pesticides. In a field test, these residues could be reduced by 45-72% after a pre-harvest interval of 3 days, and by 16-89% after 7 days, when the fresh tea shoots were sprayed with 2 or 4 L m
CONCLUSION
CONCLUSIONS
Pesticides with different structures have different penetration abilities on the tea leaf surface, and some pesticides in commercial tea can be reduced by spraying with water before fresh leaves are picked. © 2020 Society of Chemical Industry.
Substances chimiques
Insecticides
0
Neonicotinoids
0
Nitro Compounds
0
Pesticide Residues
0
Tea
0
Water
059QF0KO0R
imidacloprid
3BN7M937V8
acetamiprid
5HL5N372P0
Thiamethoxam
747IC8B487
Types de publication
Evaluation Study
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
4921-4929Subventions
Organisme : Anhui Provinical Important Science & Technology Specific Projects
ID : 201903a06020019
Organisme : the National Natural Scientific Foundation of China
ID : No.31772076 and No.31270728
Informations de copyright
© 2020 Society of Chemical Industry.
Références
Kwon H, Kim TK, Hong SM, Se EK, Cho NJ and Kyung KS, Effect of household processing on pesticide residues in field-sprayed tomatoes. Food Sci Biotechnol 24:1-6 (2015).
Ekmekyapar F and Deveci M, Dissipation of captan in soil and tomato plants in field conditions. Agrochimica 52:273-284 (2008).
Trapp S, Plant uptake and transport models for neutral and ionic chemicals. Environ Sci Pollut Res 11:33-39 (2004).
Lichtner F, Phloem mobility of crop protection products. Aust J Plant Physiol 27:609-614 (2000).
Durrant WEDX, Systemic acquired resistance. Annu Rev Phytopathol 42:185-209 (2004).
Goulson D, Review: an overview of the environmental risks posed by neonicotinoid insecticides. J Appl Ecol 50:977-987 (2013).
Hou R, Zhang Z, Pang S, Yang T, Clark JM and He L, Alteration of the nonsystemic behavior of the pesticide ferbam on tea leaves by engineered gold nanoparticles. Environ Sci Technol 50:6216-6223 (2016).
Shawki MA, Titěra D, Kazda JA and Kohoutková J, Toxicity to honeybees of water guttation and dew collected from winter rape treated with Nurelle D. Plant Prot Sci 42:9-14 (2006).
Collins C, Fryer M and Grosso A, Plant uptake of non-ionic organic chemicals. Environ Sci Technol 40:45-52 (2006).
Fantke P and Juraske R, Variability of pesticide dissipation half-lives in plants. Environ Sci Technol 47:3548-3562 (2013).
Pan R, Chen HP, Zhang ML, Wang QH, Jiang Y and Liu X, Dissipation pattern, processing factors, and safety evaluation for Dimethoate and its metabolite (Omethoate) in tea (Camellia sinensis). PLoS One 10:e0138309 (2015).
Park JY, Choi JH, Kim BM, Park JH, Cho SK, Ghafar MW et al., Determination of acetamiprid residues in zucchini grown under greenhouse conditions: application to behavioral dynamics. Biomed Chromatogr 25:136-146 (2011).
Wild E, Dent J, Thomas GO and Jones KC, Real-time visualization and quantification of PAH photodegradation on and within plant leaves. Environ Sci Technol 39:268-273 (2005).
Schynowski F and Schwack W, Photochemistry of parathion on plant surfaces: relationship between photodecomposition and iodine number of the plant cuticle. Chemosphere 33:2255-2262 (1996).
Niu J, Chen J, Henkelmann B, Quan X, Yang F, Kettrup A et al., Photodegradation of PCDD/fs adsorbed on spruce (Picea abies (L.) karst.) needles under sunlight irradiation. Chemosphere 50:1217-1225 (2003).
Lavieille D, Halle AT and Richard C, Understanding mesotrione photochemistry when applied on leaves. Environ Chem 5:420-425 (2008).
Eyheraguibel B, ter Halle A and Richard C, Photodegradation of Bentazon, Clopyralid, and Triclopyr on model leaves: importance of a systematic evaluation of pesticide Photostability on crops. J Agric Food Chem 57:1960-1966 (2009).
Fukushima M and Katagi T, Photodegradation of fenitrothion and parathion in tomato epicuticular waxes. J Agric Food Chem 54:474-479 (2006).
Katagi T, Photodegradation of pesticides on plant and soil surfaces, in Reviews of environmental contamination and toxicology. Springer, New York, pp. 1-78 (2004).
Hou RY, Jiao WT, Qian XS, Wang XH, Xiao Y and Wan XC, Effective extraction method for determination of neonicotinoid residues in tea. J Agric Food Chem 61:12565-12571 (2013).
Di MA, Fidente P, Barbini DA, Dommarco R, Seccia S and Morrica P, Application of solid-phase extraction and liquid chromatography-mass spectrometry to the determination of neonicotinoid pesticide residues in fruit and vegetables. J Chromatogr A 1108:1-6 (2006).
Guo J, Tong M, Tang J, Bian H, Wan X, He L et al., Analysis of multiple pesticide residues in polyphenol-rich agricultural products by UPLC-MS/MS using a modified QuEChERS extraction and dilution method. Food Chem 274:452-459 (2019).
Tong M, Gao W, Jiao W, Zhou J, Li Y, He L et al., Uptake, translocation, metabolism, and distribution of glyphosate in nontarget tea plant (Camellia sinensis L.). J Agric Food Chem 65:7638-7646 (2017).
Jetter R and Schaffer S, Chemical composition of the Prunus laurocerasus leaf surface. Dynamic changes of the epicuticular wax film during leaf development. Plant Physiol 126:1725-1737 (2001).
Schönherr J, Characterization of aqueous pores in plant cuticles and permeation of ionic solutes. J Exp Bot 57:2471-2491 (2006).
Hou R, Tong M, Gao W, Wang L, Yang T and He L, Investigation of degradation and penetration behaviors of dimethoate on and in spinach leaves using in situ SERS and LC-MS. Food Chem 237:305-311 (2017).
Edgington LV, Structural requirements of systemic fungicides. Annu Rev Phytopathol 19:107-124 (1981).
Wang CJ and Liu ZQ, Foliar uptake of pesticides - present status and future challenge. Pest Biochem Physiol 87:1-8 (2007).
Casida JE and Lykken L, Metabolism of organic pesticide chemicals in higher plants. Annu Rev Plant Physiol 20:607-636 (1969).