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Effects of the interaction between flupyradifurone and pyraclostrobin combined with fluxapyroxad on foragers of the stingless bee Melipona scutellaris (Latreille, 1811)

Grant number: 23/02599-9
Support Opportunities:Scholarships in Brazil - Master
Effective date (Start): June 01, 2023
Effective date (End): December 31, 2024
Field of knowledge:Biological Sciences - Zoology - Applied Zoology
Principal Investigator:Osmar Malaspina
Grantee:Lais Vieira Bello Inoue
Host Institution: Instituto de Biociências (IB). Universidade Estadual Paulista (UNESP). Campus de Rio Claro. Rio Claro , SP, Brazil
Associated research grant:17/21097-3 - Bee-agriculture interactions: perspectives to sustainable use, AP.BTA.TEM

Abstract

Bees are essential pollinators for the balance of natural ecosystems, relevant for agricultural production and with high pharmaceutical potential, playing an indispensable role biodiversity and world economy. However, anthropic actions have threatened the survival of these important pollinating insects, especially the use of pesticides, which is increasingly present in crops of commercial interest. In Brazil, stingless bee species stand out for their high ecological and economic relevance, as is the case of the species Melipona scutellaris (Latreille, 1811), native to the Northeast region of the country. Currently, studies have demonstrated its high sensitivity to concentrations of active ingredients of pesticides in the environment. However, there is a lack of knowledge regarding the sublethal effects on stingless bees when compared to the model species (Apis mellifera) in ecotoxicological studies. In this sense, and based on the increase in pesticides released on the national market, the amount of research relating their effects to non-target organisms is still insufficient. As a result, this project aims to analyze, through oral exposure, the possible effects of formulated products containing the active ingredients flupyradifurone (insecticide) and pyraclostrobin combined with fluxapyroxad (fungicides) on behavior, survival rate, morphophysiology and cell viability of the midgut and Malpighian tubules in M. scutellaris, through quantitative and semi-quantitative analyses. The results obtained will contribute to reduce the knowledge gap of the real sublethal effects on stingless bees, as well as may encourage programs for more adequate management of pesticides in crops visited by the species.

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