Efeito do Cielo ULV ® sobre Tetragona clavipes (Fabricius, 1804) (Hymenoptera: Apidae) em diferentes tempos de degradação ambiental

Abstract

Cielo ULV®, composed of imidacloprid and prallethrin, approved in 2023 forultra-low-volume (fogging) application in Brazil, is used to control Aedes aegypti, the mainvector of the dengue virus. Although effective against the mosquito, the product isnonselective and can affect beneficial insects such as stingless bees. This study evaluatedthe lethal effects of Cielo ULV® on Tetragona clavipes, exposed to the product after differentdegradation times (1 h, 12 h, and 24 h). Bioassays demonstrated a high mortality rate in alltreatments (76–87%), with statistically significant differences compared to the control(p<0.005), but without distinction between exposure times. Furthermore, typical neurotoxicbehaviors were observed. The results indicate that Cielo ULV® maintains its toxicity evenafter 24 hours and poses a real risk to native pollinators. It is recommended to reviewinsecticide application practices, considering the overlap with bees' foraging activity times.