Experimental study of the effect of a glyphosate-based herbicide on a species of earthworm Aporrectodea caliginosa (Savigny, 1826) | Raziskava učinkov herbicidov na osnovi glifosata na vrsto deževnika Aporrectodea caliginosa (Savigny, 1826)aliginosa)

anglais. This work aims to demonstrate the effect of a glyphosate-based herbicide on a species of earthworm, Aporrectodea caliginosa, to provide scientific justification for the species rarity in cultivated environments where this phytosanitary product is widely used. During the fifty-two days of contamination in the laboratory, the life traits monitored and evaluated were growth and mortality. Herbicide concentrations ranging from the lowest (C30) of around 240 L/kg to the highest (C210), equivalent to 1840 L/kg, were tested. The study found that the herbicide is toxic to the Aporrectodea caliginosa species, causing growth to slow and mortality to rise as concentrations rise. We report a delayed negative effect at low concentrations, which appears after several weeks of product exposure, depending on the exposure time. However, at the highest concentrations of the herbicide studied, the early negative effect is visible after the second week of exposure.

slovène. Namen raziskave je bil prikazati učinek herbicidov na osnovi glifosata na vrsto deževnika, Aporrectodea caliginosa za znanstveno potrditev ogroženosti te vrste v urbanem okolju, kjer se ta herbicid veliko uporablja. Med dvainpetdesetimi dnevi zastrupljanja v laboratoriju sta bili spremljani in ovrednoteni rast in mortaliteta. Preiskušene koncentracije herbicida so bile v območju od najmanjših, C30, okrog 240 l kg-1, do največjih, C210, ki so ustrezale 1840 l kg-1. Izsledki raziskave so pokazali, da je herbicid strupen za to vrsto in povzroča upočasnjevanje rasti in veča njeno mortaliteto s povečevanjem koncentracije. Opaženi so bili tudi negativni učinki manjših koncentracij, ki so se pojavili več tednov po izpostavitvi in so bili odvisni od časa izpostavitve. Pri večjih koncentracijah herbicida so bili negativni učinki vidni že po dveh tednih izpostavitve.