Folsomia candida (Collembola) locomotor activity pattern is changed by a neurotoxicant pesticide

Abstract

Behavioural traits, including locomotor activity, have become relevant parameters in contemporary ecotoxicology. However, insecticide effects on soil animal behaviour has remained a neglected field until now. The Trebon 30 EC is an expansively used pyrethroid insecticide in many countries, which has a broad spectrum of activity. It is recommended against pests of different vegetables, cereals, fruits, and flowers. The effect of this insecticide on the behaviour of collembola Folsomia candida has never been tested. Nevertheless, an effect is likely, because of the neurotoxic nature of the Trebon 30 EC insecticide. This study aimed to determine, (i) whether the Trebon 30 EC insecticide (active ingredient: etofenprox) prevails on the collembola F. candida locomotor activity pattern immediately after insecticide application and (ii) if there is any temporal change in the locomotor activity pattern within one hour of insecticide application. Prompt hyperactivity followed by strongly reduced locomotor activity of F. candida due to Trebon 30 EC application has been demonstrated in this study. Collembola started to run faster even when a tenfold concentration of the recommended field rate was applied. Moreover, this insecticide causes locomotor irregularity in F. candida. Chronic insecticide exposure has a negative impact on all studied locomotor traits of this collembola, resulting in a knockdown effect.

Reproduction inhibiting effects of deoxynivalenol or T-2 toxin contaminated maize on Folsomia candida (Collembola)

“…Folsomia candida Willem, 1902 (Collembola, Isotomidae) is a widely used model animal in soil ecotoxicology (Krogh 2009, Szabó et al 2018, Szabó et al 2019. This species is distributed all over the world in organic matter-rich soils.…”

The Recolonization Concentration Concept: Using Avoidance Assays with Soil Organisms to Predict the Recolonization Potential of Contaminated Sites

“…From the contaminant perspective, it is important to consider the fate of the contaminant in soil but also its mechanisms of action, which can affect avoidance behavior dynamics and consequently recolonization processes. For instance, dimethoate was found to impair the locomotion of F. candida providing false negative avoidances [ 43 ] and etofenprox (under the formulation Trebon 30 EC) was found to promote locomotory hyperactivity followed by very reduced locomotory activity [ 44 ].…”

Agricultural trichothecene mycotoxin contamination affects the life-history and reduced glutathione content of Folsomia candida Willem (Collembola)

“…Folsomia candida is a model organism extensively used in soil ecotoxicology (Fountain & Hopkin 2005, Krogh 2009, Szabó et al 2018. It is a cosmopolitan species, distributed in organic material rich soils (Fountain & Hopkin 2005, Krogh 2009, and has a role in the humification of organic matter and the regulation of the soil microbial community (Hopkin 1997).…”