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Related Experiment Video

Updated: Feb 3, 2026

Characterization of Aquatic Biofilms with Flow Cytometry

Characterization of Aquatic Biofilms with Flow Cytometry

Published on: June 6, 2018

Behavior of cyphenothrin in aquatic environment.

Yusuke Suzuki¹, Mayumi Yoshida¹, Terumi Sugano¹

¹Environmental Health Science Laboratory, Sumitomo Chemical Co., Ltd., 4-2-1, Takatsukasa, Takarazuka, Hyogo 665-8555, Japan.

Journal of Pesticide Science

|October 27, 2018

Summary

Cyphenothrin rapidly partitions to sediment and degrades quickly in aquatic environments. Microbial action and photolysis prevent long-term persistence of this insecticide.

Keywords:

biodegradation cyphenothrin photodegradation soil adsorption water-sediment

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Area of Science:

Environmental Chemistry
Insecticide Degradation
Aquatic Toxicology

Background:

Cyphenothrin is a synthetic pyrethroid insecticide.
Understanding its environmental fate is crucial for risk assessment.

Purpose of the Study:

To investigate the behavior and degradation of cyphenothrin in aquatic environments.
To determine the degradation pathways and rates of cyphenothrin isomers.

Main Methods:

Utilized 14C-labeled trans and cis isomers of cyphenothrin.
Investigated degradation in a water-sediment system under dark and photolytic conditions.
Analyzed degradation products and mineralization to CO2.

Main Results:

Cyphenothrin rapidly partitions from water to sediment.
Degradation half-lives were 2.0 days (trans) and 7.3 days (cis) in the dark.
Aqueous photolysis reduced half-life to <1 day, primarily via oxidation and ester cleavage.
Microbial degradation yielded 3-phenoxybenzoic acid, bound residues, and CO2.

Conclusions:

Cyphenothrin is unlikely to persist in aquatic environments.
Rapid photolysis and extensive microbial degradation contribute to its low persistence.
Environmental factors significantly influence cyphenothrin's fate.