Acute toxicity of two dry glyphosate-based herbicide formulations (Water Dispersible Granules and Solubles Granules) on the earthworm Eudrilus eugeniae, KINBERG, 1867 (Oligochaeta, Eudrilidae)

• Published in: International journal of innovation and applied studies Vol. 39; no. 1; pp. 517 - 524
• Main Authors: Gains, Kpan Kpan Kouakou, Emile, Yao Kouadio, Ehouman, Moise N'Guetta, Mamadou, Toure, Seydou, Tiho, Ardjouma, Dembele
• Format: Journal Article
• Language: English
• Published: Rabat International Journal of Innovation and Applied Studies 01.03.2023
• Subjects: Agrochemicals; Enzymes; Granular materials; Herbicides; Ingredients; Lethality; Pesticides; Soils; Toxicity; Worms; United States > US; Germany
• ISSN: 2028-9324

The dry formulations of agrochemicals reduce the difficulties related to transport and exposure of users. Nevertheless, these products do not exclude drawbacks and their use requires a deeper knowledge of their toxicological and ecotoxicological effects. The purpose of this work was to study the acute toxicity and reproductive toxicity of glyphosate-based RAPID MAX 750 WG and TAKO-KELE 757 SG on the earthworm Eudrilus eugeniae, ubiquitous in tropical area. Lethality tests were conducted according to EPS1/RM/43, MA.500-VTL1.0, and OECD guideline 207 Methods. LC50 of RAPID MAX were (1687.56±50.53 mg of glyphosate (a.e.) /kg of soil (DW) for adult earthworms and 1416,99±53,06 mg of glyphosate (a.e.) /kg of soil (DW) for juvenile earthworms. LC50 of TAKO-KELE 757 SG were 2215.66±61.83 mg of glyphosate (a.e.) /kg of soil (DW) and 1658.62±38.72 mg of glyphosate (a.e.) /kg of soil (DW), respectively for adult and juvenile earthworms. Juvenile and adult earthworms were more sensitive to RAPID MAX 750 WG compared with TAKO-KELE 757 SG, as LC50 related to RAPID MAX 750 WG were lower than those of SG TAKO-KELE 757 SG. The acute toxicity (lethality) of both herbicides was more severe on juvenile earthworms.