Abstract

In this article an attempt was made to present the results of toxicity assessment of insecticides from the group of neonicotinoids, Mospilan RP (active substance acetamiprid) and Actara 25 WG (active substance thiamethoxam) in white mice. The aim was to investigate the acute toxicity of Mospilan RP and Actara 25 WG in white mice. The half-lethal dose (LD50) of Mospilan RP was found to be131.25 ± 34.12 mg/kg Body Weight (BW) per active substance and 656.25 ± 170.6 mg/kg BW per drug, and the Lethal Dose (LD100) was 200 mg/kg BW by the active ingredient (1000 mg/kg BW by drug). The half-life dose (DL50) of Actara 25 WG for white mice was 907.81 ± 24.03 mg/kg BW for the active substance, and 3631.24 ± 96.12 mg/kg BW for the drug; The lethal dose (LD100) was also 1200 mg/kg BW per active ingredient (4800 mg/kg BW per drug). The acute course of poisoning by Mospilan RP and Actara 25 WG in mice was characterized mainly by nervous disorders (lesions of the central and peripheral nervous systems), which is evidenced by the clinical features of poisoning including depression, convulsions, ataxia (impaired movement coordination), tremor and impaired breathing. It has been established that Mospilan RP belongs to the third toxicity class according to the Hygienic classification of substances by skin-resorptive toxicity (DL50> 2000 mg/kg).