Efficacy and toxicity of insecticides to green peach aphid

Jaconias Escócio Lima Neto; Guilherme Gomes Rolim; Susanne Lúcia Silva De Maria; Sara Yuri Medeiros Watanabe; Thalita Christine Lima Mendes

Jaconias Escócio Lima Neto Departamento de Agronomia (Entomologia), Universidade Federal Rural de Pernambuco (UFRPE). Rua Dom Manoel de Medeiros S/N. Bairro Dois Irmãos. Recife, PE – CEP 52171-900. https://orcid.org/0000-0002-1350-1520
Guilherme Gomes Rolim Departamento de Agronomia (Entomologia), Universidade Federal Rural de Pernambuco (UFRPE). Rua Dom Manoel de Medeiros S/N. Bairro Dois Irmãos. Recife, PE – CEP 52171-900. https://orcid.org/0000-0002-4254-6226
Susanne Lúcia Silva De Maria Departamento de Zoologia – Universidade Federal do Pará, R. Augusto Corrêa 1, 66075-110, Guamá, Belém, PA. https://orcid.org/0000-0002-9513-6204
Sara Yuri Medeiros Watanabe Departamento de Agronomia – Universidade Federal Rural da Amazônia, Tv. Pau Amarelo S/N, Vila Nova, 68650-000, Capitão Poço, PA. https://orcid.org/0000-0002-9284-7879
Thalita Christine Lima Mendes Departamento de Agronomia – Universidade Federal Rural da Amazônia, Tv. Pau Amarelo S/N, Vila Nova, 68650-000, Capitão Poço, PA. https://orcid.org/0000-0002-2907-9598

Keywords: Myzus persicae, piretroide, neonicotinoide, diamidas antranílicas, suscetibilidade

Abstract

Outbreaks of Myzus persicae (Sulzer) (Hemiptera: Aphididae) populations are not rare in Brassica crops in Pernambuco State (Brazil). The aim of the present study was to perform laboratory assessments in seven insecticide formulations against M. persicae. The direct spray and leaf dip methods were used in the experiment. M. persicae mortality rates were subjected to variance and Probit analyses. Based on the results, thiamethoxam + lambda-cyhalothrin, thiamethoxam, lambda-cyhalothrin and thiamethoxam + chlorantraniliprole were the most efficient insecticides after 24-hour exposure, since they caused over 95% mortality through the direct spray method. LC_50s ranged from 0.10 to 9.1 mg a.i./L in chlorfenapyr and chlorantraniliprole, respectively, in the leaf dip method. All insecticides were effective against M. persicae, except for chlorantraniliprole. Chlorfenapyr, lambda-cyhalothrin, pymetrozine and thiamethoxam + lambda-cyhalothrin were the most toxic to this aphid.

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