Behavior of Thiamethoxam and Clothianidin in Young Oilseed Rape Plants before Flowering, Monitored by QuEChERS/LC–MS/MS Protocol

Izabela Hrynko (), Gulzhakhan Ilyasova, Magdalena Jankowska, Ewa Rutkowska, Piotr Kaczyński and Bożena Łozowicka
Additional contact information
Izabela Hrynko: Institute of Plant Protection–National Research Institute, Chelmonskiego 22, 15-195 Bialystok, Poland
Gulzhakhan Ilyasova: Faculty of Natural Sciences, L.N. Gumilyov Eurasian National University, Satpayev 2, Astana 010008, Kazakhstan
Magdalena Jankowska: Institute of Plant Protection–National Research Institute, Chelmonskiego 22, 15-195 Bialystok, Poland
Ewa Rutkowska: Institute of Plant Protection–National Research Institute, Chelmonskiego 22, 15-195 Bialystok, Poland
Piotr Kaczyński: Institute of Plant Protection–National Research Institute, Chelmonskiego 22, 15-195 Bialystok, Poland
Bożena Łozowicka: Institute of Plant Protection–National Research Institute, Chelmonskiego 22, 15-195 Bialystok, Poland

Agriculture, 2024, vol. 14, issue 5, 1-15

Abstract: Nitro-substituted neonicotinoid insecticides have been widely used until recently to control a range of important agricultural pests. Growing concerns about thiamethoxam’s toxicity to pollinators have led to its use being restricted or to it even being banned in some countries. Nevertheless, in Asia, Africa, Southeast Europe, and South America thiamethoxam is still used. Although thiamethoxam has been intensively studied all over the world, its dissipation dynamics have not been studied in depth. The subject of the present study was to (1) develop and validate a QuEChERS/LC-MS/MS protocol for the determination of thiamethoxam and its main metabolite clothianidin in samples of young oilseed rape plants with high chlorophyll content, and (2) make a comparison of the degradation behaviors of thiamethoxam and clothianidin in two crops of winter oilseed rape, cultivated on soils with different pH. For determination of thiamethoxam and clothianidin in plant material with high chlorophyll content, a QuEChERS/LC–MS/MS protocol enabling the detection of low levels of compound concentrations was developed. The proposed clean-up protocol provided recoveries within the range of 92–98% for the compounds under analysis. Precision, calculated as relative standard deviation, was below 20%. Satisfactory linearity of the method was obtained in the concentration range under analysis (0.001–1.0 mg kg −1 ). Differences in degradation of both insecticides, depending on the physico-chemical properties of the soil, were observed. Thiamethoxam and clothianidin residues disappeared in plants very quickly, and they were not detected below the limit of quantitation in oilseed rape at the flowering stage.

Keywords: nitro-substituted neonicotinoids; oilseed rape plants; Brassica napus; dissipation; clean-up protocol (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2024
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2077-0472/14/5/759/pdf (application/pdf)
https://www.mdpi.com/2077-0472/14/5/759/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jagris:v:14:y:2024:i:5:p:759-:d:1393978

Access Statistics for this article

Agriculture is currently edited by Ms. Leda Xuan

More articles in Agriculture from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().