Fate and metabolism of dichlorprop in cereals and field grass

Goedicke, H.; Banasiak, U.

doi:10.1007/bf01055157

Cited by 3 publications

(2 citation statements)

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“…Both dichlorprop and its 4-hydroxy derivatives undergo conjugation with diglucoses via the carboxyl group and the hydroxyl group, respectively . Similar to 2,4-D, amino acid conjugates of dichlorprop are not observed in cereals and grass. , Fluazifop-butyl partly degrades to the free acid fluazifop, , which is also conjugated in the plant . Condensed information on the metabolism of 2,4-D, haloxyfop, dicamba, and MCPA is available from reports of the WHO/FAO Joint Meeting on Pesticide residues (JMPR).…”

Section: Introductionmentioning

confidence: 99%

“…The JMPR report for haloxyfop mentioned the necessity of “mild” alkaline hydrolysis to release the free acid from glycosides or triglycerides. Glycosidic conjugates of diclorprop were hydrolyzed with the enzyme cellulose. , A summary of these and many subsequent studies on the hydrolysis of conjugates is given in Table , in which it can be observed that most authors preferred alkaline hydrolysis, which was mainly applied before extraction with organic solvents. Only one author compared hydrolysis before and after the extraction step and found fewer problems and better performance with hydrolysis after extraction …”

Section: Introductionmentioning

confidence: 99%

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Development of a QuEChERS-Based Method for the Simultaneous Determination of Acidic Pesticides, Their Esters, and Conjugates Following Alkaline Hydrolysis

Steinborn

Alder

Spitzke

et al. 2017

J. Agric. Food Chem.

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An analytical procedure was developed allowing the simultaneous determination of acidic pesticides and their conjugates by addition of an alkaline hydrolysis step into the European Union (EU) version of the QuEChERS method. The procedure resulted additionally in hydrolysis of most esters of phenoxy acids. On the basis of information from metabolism studies and the hydrolytic conditions employed in supervised field trials as well as results on the influence of physical and chemical parameters (temperature, time, type of solvent, type of matrix), alkaline hydrolysis for 30 min at 40 °C was deemed a good compromise for the determination of residues of 2,4-D, dichlorprop, fluazifop, haloxyfop, MCPA, and MCPB. The applicability of the proposed method was tested by analyzing food samples with incurred residues in six German laboratories not involved in method development. Up to 6 times higher residues are measured by using the QuEChERS extraction procedure with the newly developed alkaline hydrolysis step.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development of a QuEChERS-Based Method for the Simultaneous Determination of Acidic Pesticides, Their Esters, and Conjugates Following Alkaline Hydrolysis

Steinborn

Alder

Spitzke

et al. 2017

J. Agric. Food Chem.

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Plant and soil enantioselective biodegradation of racemic phenoxyalkanoic herbicides

1999

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Direct and indirect effects of plant diversity and phenoxy herbicide application on the development and reproduction of a polyphagous herbivore

Gutiérrez

Ott

Scherber

2020

Sci Rep

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Widespread application of synthetic pesticides and loss of plant diversity are regarded as significant drivers of current global change. The effects of such phenomena on insect performance have been extensively studied separately, yet the interactions of these two drivers have been poorly explored. Here, we subjected the polyphagous grasshopper Pseudochorthippus parallelus (Zetterstedt, 1821) to a full-lifecycle field experiment with 50 cages containing experimental plant communities differing in grass species richness (2 vs. 8 grass species), half of them treated with a phenoxy herbicide commonly employed to control broadleaf plants in grasslands. We measured plant elemental content as a proxy for plant physiology, and a wide range of insect traits in both female and male grasshoppers. In females, grass diversity increased herbivory, insect nitrogen content and egg load, while herbicide reduced herbivory but increased the number of offspring, likely mediated by altered plant community composition. In males, grass diversity also increased herbivory, had positive effects on fat body, muscle volume and lifespan, and negative effects on body mass. Herbicide negatively affected herbivory in both females and males. Overall, plant diversity and herbicides may shift resource allocation in generalist terrestrial insect herbivores, indicating complex and unexpected effects of human-induced environmental change.

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Fate and metabolism of dichlorprop in cereals and field grass

Cited by 3 publications

References 10 publications

Development of a QuEChERS-Based Method for the Simultaneous Determination of Acidic Pesticides, Their Esters, and Conjugates Following Alkaline Hydrolysis

Development of a QuEChERS-Based Method for the Simultaneous Determination of Acidic Pesticides, Their Esters, and Conjugates Following Alkaline Hydrolysis

Plant and soil enantioselective biodegradation of racemic phenoxyalkanoic herbicides

Direct and indirect effects of plant diversity and phenoxy herbicide application on the development and reproduction of a polyphagous herbivore

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