Combined activity of natural products and the fungal entomopathogen Cordyceps farinosa against Bagrada hilaris (Hemiptera: Pentatomidae)

Authors

  • Moisés Felipe-Victoriano Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP), Campo Experimental Las Huastecas (CEHUAS), Sanidad Forestal y Agrícola, Altamira, Tamaulipas 89610, México
  • Renato Villegas-Luján Universidad Autónoma Agraria Antonio Narro (UAAAN), Departamento de Parasitología Agrícola, saltillo, Coahuila 25315, México
  • Diego Treviño-Cueto Universidad Autónoma Agraria Antonio Narro (UAAAN), Departamento de Parasitología Agrícola, saltillo, Coahuila 25315, México
  • Sergio Sánchez Peña Universidad Autónoma Agraria Antonio Narro (UAAAN), Departamento de Parasitología Agrícola, saltillo, Coahuila 25315, México

Abstract

The invasive painted bug, Bagrada hilaris (Burmeister) (Hemiptera: Pentatomidae) is causing important losses in Brassica production. The main tool for management of this insect is the use of synthetic insecticides. There is an urgent need to find efficacious and environmentally friendly alternatives for its management. In this work, natural products (neem and lemongrass oils, and the microbial derivative spinosad) were tested separately and in combination with suspensions of infective conidia of the entomopathogenic fungus Cordyceps farinosa (Holmsk.) Kepler, Shrestha & Spatafora (Hypocreales: Cordycipitaceae) (strain ARSEF 13507) in the laboratory. The application of C. farinosa alone caused significant mortality. Regarding individual natural products, the highest mortality was obtained with spinosad. Neem oil alone caused low, non-significant mortality, and lemongrass oil alone caused low, marginally significant mortality. Both oils in combination with C. farinosa resulted in antagonistic effects, compared with the fungus alone. The combination of C. farinosa with spinosad resulted in increased insect mortality (20% and higher) compared with the separate agents. Our results indicate that spinosad (a high-price insecticide) should be tested in reduced amounts and combined with C. farinosa or possibly other entomopathogenic fungi, for control of painted bugs.

 

Resumen

La chinche pintada Bagrada hilaris (Burmeister) (Hemiptera: Pentatomidae) es un insecto invasor que causa pérdidas importantes en la producción de Brassica. La principal herramienta para su manejo es el control con insecticidas sintéticos. Urge encontrar alternativas eficaces y respetuosas con el medio ambiente para su manejo. En este trabajo, los productos naturales (aceites de neem y zacate limón o limoncillo, y el derivado microbiano spinosad) se probaron por separado y en combinación con suspensiones de conidias infectivas del hongo entomopatógeno Cordyceps farinosa (Holmsk.) Kepler, Shrestha & Spatafora (Hypocreales: Cordycipitaceae) (aislamiento ARSEF 13507) en el laboratorio. La aplicación de C. farinosa sola provocó mortalidad significativa. Con respecto a los productos naturales individuales, la mayor mortalidad se obtuvo con spinosad. El aceite de neem por sí solo causó mortalidad baja, no significativa y el de limncillo causó mortalidad baja, marginalmente significativa. Ambos aceites en combinación con C. farinosa produjeron efectos antagónicos, en comparación con el hongo solo. La combinación de C. farinosa con spinosad resultó en una mayor mortalidad de insectos (20% y más) en comparación con los agentes separados. Nuestros resultados indican que el spinosad (un insecticida de alto precio) debe probarse en cantidades reducidas, combinado con C. farinosa o posiblemente con otros hongos entomopatógenos, para el control de la chinche pintada.

Key Words: fungi; lemongrass; neem; essential oils; biological control; spinosad

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Author Biographies

Moisés Felipe-Victoriano, Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP), Campo Experimental Las Huastecas (CEHUAS), Sanidad Forestal y Agrícola, Altamira, Tamaulipas 89610, México

http://www.inifapcirne.gob.mx/DrMoisesFelipeVictoriano.php

 

 

Renato Villegas-Luján, Universidad Autónoma Agraria Antonio Narro (UAAAN), Departamento de Parasitología Agrícola, saltillo, Coahuila 25315, México

Renato is a Doctoral student in Plant Protection at the Universidad Autónoma Agraria Antonio Narro, Saltillo Coahuila Mexico

Diego Treviño-Cueto , Universidad Autónoma Agraria Antonio Narro (UAAAN), Departamento de Parasitología Agrícola, saltillo, Coahuila 25315, México

Diego Treviño-Cueto is an almost graduated Doctoral student at Universidad Autónoma Agraria Antonio Narro, Saltillo Coahuila Mexico

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Published

2023-10-20

Issue

Vol. 106, No. 3 (September 2023)

Section

Research Papers

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