Effect of neonicotinoid and fungicide strobilurin in neotropical solitary bee Centris analis

Autor(es)

Tadei, Rafaela ; Castor, Rebeca E. S. ; Malaspina, Osmar ; da Silva, Elaine C. Mathias

• Tipo de documento: Artigo Científico
• Fonte: Environmental Pollution; v. 360, p. 10-pg., 2024-08-13.

Resumo

The indiscriminate use of pesticides is one of the factors directly impacting bee populations. However, limited information is available on the pesticide effects on solitary bees, especially in Neotropical countries. In this scenario, this study evaluated the survival and histopathological effects caused by the neonicotinoid insecticide acetamiprid (7 ng/mu L) and the fungicide azoxystrobin (10 ng/mu L) in the midgut and parietal fat body of the solitary bee Centris analis. Female and male newly-emerged bees were orally exposed for 48 h to the pesticides, or alone or in combination, under laboratory conditions. The exposure to the insecticide reduced the survival of males, while the mixture reduced survival in both sexes. Acetamiprid promoted a reduction in the number of regenerative nests in the midgut, alterations of fat body cells by increasing carbohydrates in trophocytes, and reduction of oenocyte size, and increased the frequency of pericardial cells in the advanced activity stage. Both pesticides caused changes in HSP70 immunolabelling of midgut from males at the end of pesticide exposure. Comparatively, the effects on males were stronger than in females exposed to the same pesticides. Therefore, acetamiprid alone and in mixture with fungicide azoxystrobin can be harmful to males and females of Neotropical solitary bee C. analis showing lethal and sublethal effects at a concentration likely to be found in the environment. (AU)

• Processo FAPESP: 19/27863-5 - Mistura de agrotóxicos pode prejudicar a saúde, comportamento e reprodução de abelhas solitárias nativas?
• Beneficiário: Rafaela Tadei
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 17/21097-3 - Interações abelha-agricultura: perspectivas para a utilização sustentável
• Beneficiário: Osmar Malaspina
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático