Rodenticide efficacy in sewers in Sao Paulo, Brazil

Autor(es)

Papini, Solange ^[1] ; de Masi, Eduardo ^[1] ; Nakagawa, Lia E. ^[2] ; de Oliveira, Jennifer C. B. ^[2]

Afiliação do(s) autor(es)

^[1] Municipal Heath Secretary, Municipal Sao Paulo, Sao Paulo - Brazil

^[2] Biol Inst, Conselheiro Rodrigues Alves Ave 1252, BR-04014900 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Environmental Science and Pollution Research; v. 26, n. 34, p. 35270-35274, DEC 2019.
• Citações Web of Science: 0

Resumo

Rodents infest urban environments, causing damage and acting as vectors for disease transmission. Currently, anticoagulants are the most widely used chemical rodenticides, and their extensive and widespread use can contaminate the environment. To ensure effectiveness and avoid accumulation of rodent baits in the environment, it is important to evaluate how long rodent baits maintain their palatability and efficacy. In rodent control programs, rodent baits are placed in locations such as sewers, but after a few days, baits appear altered, causing doubts about the control efficacy. For this reason, baits are replaced periodically, which increases costs and generation of chemical waste. The objective of this study was to evaluate the palatability and efficacy of commercial paraffin-type rodent bait blocks placed in sewers in Sao Paulo City over a period of 90 days. Bait blocks were placed in sewers and collected after 30, 60, and 90 days. Additionally, in a laboratory two-choice test, wild-caught urban Norway rats were offered 40-60 g of bait and an equal volume of standard rat pellets. The amount of bait and rat pellet consumed was registered, the palatability was calculated, and the efficacy was measured as the percentage mortality over 14 days. The results showed that, even when they had an altered appearance, bait blocks remained palatable to the rats and were effective after at least 90 days. Leaving bait blocks for longer periods could be an effective strategy for reducing costs and could help to ensure the control of urban rodents in an environmentally sustainable way. (AU)

• Processo FAPESP: 12/51431-9 - Avaliação da eficácia do rodenticida bromadiolona formulado como bloco parafinado no controle de Rattus norvegicus capturados em regiões diferentes da Cidade de São Paulo e verificação da ocorrência de resistência a esse ingrediente ativo
• Beneficiário: Solange Papini
• Modalidade de apoio: Auxílio à Pesquisa - Regular