Neem extracts as a strategy for the control of Meloidogyne javanica on tomato plants

Marlon Henrique Hahn; Louise Larissa May-De-Mio; Sérgio Miguel Mazaro; Walmes Marques Zeviani; Henrique da Silva Silveira Duarte

doi:10.17765/2176-9168.2025v18e12790

Autores

Marlon Henrique Hahn Universidade Federal do Paraná https://orcid.org/0000-0003-2880-7116
Louise Larissa May-De-Mio Universidade Federal do Paraná https://orcid.org/0000-0002-4202-4428
Sérgio Miguel Mazaro Universidade Tecnológica Federal do Paraná https://orcid.org/0000-0003-2787-9409
Walmes Marques Zeviani Universidade Federal do Paraná https://orcid.org/0000-0001-5503-8565
Henrique da Silva Silveira Duarte Universidade Federal do Paraná https://orcid.org/0000-0002-8128-5428

DOI:

https://doi.org/10.17765/2176-9168.2025v18e12790

Palavras-chave:

Azadirachta indica, Dose-response, Effective concentration, Root-knot nematode

Resumo

Neem (Azadirachta indica) extracts are commonly used in agriculture for their pesticidal properties and potential benefits in pest management and crop protection. To evaluate the use of two neem-based extracts to control M. Meloidogyne javanica in tomato plants, experiments were conducted with eggs and second-stage juveniles (J₂) of M. javanica to estimate the 50% effective concentration (EC₅₀) at concentrations of 0.0% to 0.75% (v v^-1) and 0.0% to 20.0% (v v^-1) of neem extracts, respectively. Tomato plants were treated with concentrations from 0.0% to 3.00% of the neem extracts to assess the penetration of M. javanica J₂. The extracts were applied in tomato plants infested with M. javanica eggs for comparison to carbofuran and abamectin. The estimated EC₅₀ values for Extract 1 and Extract 2 were 0.44% and 0.40% for the hatching of J₂ and 13.9% and 19.3% for the mortality of J₂, respectively. The applications of the extracts on tomato plants infested with M. javanica J₂ had no significant effects on the height and dry matter of tomato plants but resulted in a significant reduction on the reproduction factor of M. javanica. The treatment with a concentration of 1.00% of neem extracts reduced the reproduction factor of M. javanica, as did the treatment with abamectin. Neem extracts have a nematicidal effect on eggs and second-stage juveniles of M. javanica and can suppress the population of M. javanica in tomato plants. Neem extracts have potential for controlling M. javanica.

Biografia do Autor

Marlon Henrique Hahn, Universidade Federal do Paraná

Doutor em Agronomia pela Universidade Federal do Paraná (UFPR). Pesquisador em fitopatologia do programa de melhoramentogenético de soja e milho da INOVA Genética em Cristalina, GO, Brasil.

Louise Larissa May-De-Mio, Universidade Federal do Paraná

Doutora em Agronomia na Escola Superior de Agricultura Luiz de Queiroz (USP/ESALQ). Professora Titular da Universidade Federal do Paraná (UFPR), PR, Brasil.

Sérgio Miguel Mazaro, Universidade Tecnológica Federal do Paraná

Doutor em Agronomia pela Universidade Federal do Paraná (UFPR). Professor Titular da Universidade Tecnológica Federal do Paraná (UTFPR), PR, Brasil.

Walmes Marques Zeviani, Universidade Federal do Paraná

Doutorado em Estatística e Experimentação Agropecuária pela Universidade Federal de Lavras (UFLA). Professor Adjunto da Universidade Federal do Paraná (UFPR), PR, Brasil.

Henrique da Silva Silveira Duarte, Universidade Federal do Paraná

Doutor em Agronomia pela Universidade Federal de Viçosa (UFV). Professor Associado da Universidade Federal do Paraná (UFPR), PR, Brasil.

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