Lethal and Sublethal Effects of an Essential Oil-Based Emulsion of Patchouli, Pogostemon cablin (Lamiaceae), on the Tomato Leafminer

Thiago Leandro Costa, Renata Cordeiro dos Santos, Abraão Almeida Santos, Emílio de Souza Pimentel (), Eraldo Lima, Claudio Vieira Batista, Leandro Bacci, Damaris Rosa de Freitas and Marcelo Coutinho Picanço
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Thiago Leandro Costa: Department of Plant Science, Federal University of Viçosa, Vicosa 36570-900, MG, Brazil
Renata Cordeiro dos Santos: Department of Entomology, Federal University of Viçosa, Vicosa 36570-900, MG, Brazil
Abraão Almeida Santos: West Florida Research and Education Center, Entomology and Nematology Department, University of Florida, Jay, FL 32565, USA
Emílio de Souza Pimentel: Department of Entomology, Federal University of Viçosa, Vicosa 36570-900, MG, Brazil
Eraldo Lima: Department of Entomology, Federal University of Viçosa, Vicosa 36570-900, MG, Brazil
Claudio Vieira Batista: Department of Plant Science, Federal University of Viçosa, Vicosa 36570-900, MG, Brazil
Leandro Bacci: Departamento de Engenharia Agronômica, Universidade Federal de Sergipe, Sao Cristovao 49100-000, SE, Brazil
Damaris Rosa de Freitas: Department of Entomology, Federal University of Viçosa, Vicosa 36570-900, MG, Brazil
Marcelo Coutinho Picanço: Department of Entomology, Federal University of Viçosa, Vicosa 36570-900, MG, Brazil

Agriculture, 2023, vol. 13, issue 8, 1-10

Abstract: There has been an excitement toward novel eco-friendly alternatives to pest management, particularly formulations based on essential oils (EOs). Here, the biological activity of an EO-based emulsion derived from patchouli, Pogostemon cablin, was assessed against Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae), a devastating and invasive pest in tomato crops worldwide. Laboratory bioassays were carried out to determine and compare lethal doses, lethal times, oviposition of treated individuals, and oviposition of T. absoluta on treated leaves of tomato to pure patchouli essential oil or its emulsion containing 18% of oil. The LD50 were 10.06 and 2.57 µg of patchouli per mg of insect for the EO and emulsion, respectively. Oviposition was reduced in adults derived from the second instar treated with LD 10 by 78.5% (EO) and 85.4% (emulsion). The EO and its emulsion conferred similar avoidance to adults when sprayed on tomato leaves. Therefore, both formulations present similar lethal and sublethal effects against T . absoluta . This study demonstrated a remarkable potential of an emulsion containing 18% of P. cablin oil to be employed for T . absoluta management on tomato crops. Further studies are needed to assess and guarantee open field applications.

Keywords: acute toxicity; biorational insecticide; integrated pest management; plant-based pesticide (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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