Results 61 to 70 of about 9,758 (222)

Utilization of QuEChERS method in food analysis

open access: yes, 2014
Práce se zabývá nově používanou metodou k úpravě vzorku před analýzou zvanou QuEChERS. Dále je zde uvedeno, pro které analyty a matrice se nejčastěji využívá, historie a podstata metody.
Rak, Zdeněk
core   +1 more source

Host resistance modulates in planta efficacy of seed‐applied fluxapyroxad against spot form net blotch in barley

open access: yesPest Management Science, EarlyView.
Barley variety influences fluxapyroxad efficacy by affecting distribution and dissipation of the active ingredient, with plant biomass contributing to these differences. Abstract BACKGROUND Seed‐applied fungicides are used to protect barley seedlings from spot form net blotch, caused by Pyrenophora teres f. maculata, among other diseases.
Varthini Govindaraju Punithan   +5 more
wiley   +1 more source

Development and Validation GC/MS Method for Methamphetamine Analysis in Urine by Miniaturization QuEChERS

open access: yesScience and Technology Indonesia, 2023
This paper explains the development of a quick and easy gas chromatography (GC) approach to identify methamphetamine in urine. This research used gas chromatography with mass spectroscopy and a capillary column TG-5SILMS (5% phenyl methyl siloxane, 30 m ...
Soraya Aulia   +2 more
doaj   +1 more source

Evaluating larvicide performance against Culicoides sonorensis in semi‐field conditions

open access: yesPest Management Science, EarlyView.
This study evaluated the efficacy of larvicide products against Culicoides sonorensis populations under controlled semi‐field conditions. Larvicide efficacy against C. sonorensis declined over time, in different environmental conditions. In particular, precipitation and habitat disturbance influenced residual performance. Abstract BACKGROUND Culicoides
Destiny Cuellar   +8 more
wiley   +1 more source

In planta fluxapyroxad gradients from seed treatment differentially select fungicide‐sensitive and reduced‐sensitive genotypes of Pyrenophora teres f. maculata

open access: yesPest Management Science, EarlyView.
Spatial concentration gradients of seed‐applied fluxapyroxad within barley create heterogeneous exposure environments, driving differential suppression of succinate dehydrogenase inhibitor‐sensitive Pyrenophora teres f. maculata isolates and enrichment of reduced‐sensitive genotypes, thereby shaping within‐host fungicide resistance selection dynamics ...
Arundhati Singh   +5 more
wiley   +1 more source

Rapid determination simultaneously of twelve kinds of nitrophenolic compounds in water by modified QuEChERS-GC-MS

open access: yes, 2021
Objective: A simple, efficient, rapid, sensitive, reproducible, accurate and rapid method was established for the simultaneous determination of 12 nitrophenols in water.
Zhong-jing, ZHAO   +4 more
core   +1 more source

Combined (d)SPE-QuEChERS Extraction of Mycotoxins in Mixed Feed Rations and Analysis by High Performance Liquid Chromatography-High-Resolution Mass Spectrometry

open access: yesToxins, 2020
The objective of this work was the development of a methodology capable of simultaneously determine 26 mycotoxins in mixed feed rations collected in 20 dairy farms.
Rocio Facorro   +2 more
doaj   +1 more source

Persistence of seed‐applied pesticides in soybeans: environmental influences and implications for crop protection

open access: yesPest Management Science, EarlyView.
Early soybean planting in cool, wet soils slows emergence and results in about half the insecticide and fungicide concentrations at vegetative emergence compared with standard planting, where faster emergence maintains roughly double the pesticide concentrations, yet pesticide persistence remains similar across both planting dates.
Sadhana Chhetri   +2 more
wiley   +1 more source

Detected chlorpyrifos, imidacloprid, and propoxur residues in citrus by QuEChERS-high performance liquid chromatography method

open access: yes, 2017
QuEChERS is a simple and efficient extraction method, widely used in the pesticide of residue detection. The purpose of this paper was to compare the extraction methods of pesticides between the improved QuEChERS method and the GB/T 24691—2009 (fruit and
Ran, SHENG   +5 more
core   +1 more source

On‐farm comparison of aerial and chemigation application methods for Striacosta albicosta (lepidoptera: Noctuidae) management in corn using pyrethroid and diamide insecticides

open access: yesPest Management Science, EarlyView.
Aerial applications deposited more insecticide on tassels than on ear level (36.4% vs. 19.8%). Across both application methods, chlorantraniliprole minimized ear injury, while bifenthrin provided moderate control. Effective management of S. albicosta requires delivering sufficient insecticide concentration to the target site and achieving adequate ...
Andrea Rilaković   +6 more
wiley   +1 more source

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