Insecticidal activity of volcanic ash against Sitophilus oryzae L. (Coleoptera: Curculionidae) under laboratory conditions
Ecología Austral, 24:17-22 (2014)This study assessed the acute toxicity and repellence as well as feeding deterrence effect of volcanic ash (VA) on Sitophilus oryzae adults under laboratory conditions. VA resulted in significant adult mortality of S. oryzae. Acute toxicity of the VA was similar to that of commercially available diatomaceous earth DiatomiD® demonstrating its insecticidal potential. Median lethal concentration values (LC50) obtained were 1610 [1449, 1778] mg/kg for VA and 1046 [916, 1168] mg/kg for DiatomiD®.Similarly to other inert dusts, VA particle size shows a bi-modal distribution and porosity which increases its surface area. Among the smallest particles, the highest volumetric loading was close to 5 mm with a distribution of smaller particles peaking at 0.5mm. Results indicate that VA is not repellent to S. oryzae. An “engagement” response or increased interaction of the insects with the VA treated surface was observed. However, feeding deterrence indices showed that both VA and diatomaceous earth had strong feeding deterrent action. Contact of insects with VA may lead to mortality by adherence of the VA particles to the insect cuticle. However, insects prefer feeding on sites without VA covered substrates and this could have a positive impact on its use for pest management.
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Asociación Argentina de Ecología
2014
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rev-ecoaus-article-332023-11-02T19:26:40Z Insecticidal activity of volcanic ash against Sitophilus oryzae L. (Coleoptera: Curculionidae) under laboratory conditions Insecticidal activity of volcanic ash against Sitophilus oryzae L. (Coleoptera: Curculionidae) under laboratory conditions Buteler, Micaela López García, Guillermo P. Pochettino, Arístides A. Stefanazzi, Natalia Ferrero, Adriana A. Stadler, Teodoro Ecología Austral, 24:17-22 (2014)This study assessed the acute toxicity and repellence as well as feeding deterrence effect of volcanic ash (VA) on Sitophilus oryzae adults under laboratory conditions. VA resulted in significant adult mortality of S. oryzae. Acute toxicity of the VA was similar to that of commercially available diatomaceous earth DiatomiD® demonstrating its insecticidal potential. Median lethal concentration values (LC50) obtained were 1610 [1449, 1778] mg/kg for VA and 1046 [916, 1168] mg/kg for DiatomiD®.Similarly to other inert dusts, VA particle size shows a bi-modal distribution and porosity which increases its surface area. Among the smallest particles, the highest volumetric loading was close to 5 mm with a distribution of smaller particles peaking at 0.5mm. Results indicate that VA is not repellent to S. oryzae. An “engagement” response or increased interaction of the insects with the VA treated surface was observed. However, feeding deterrence indices showed that both VA and diatomaceous earth had strong feeding deterrent action. Contact of insects with VA may lead to mortality by adherence of the VA particles to the insect cuticle. However, insects prefer feeding on sites without VA covered substrates and this could have a positive impact on its use for pest management. Ecología Austral, 24:17-22 (2014)En este estudio se evaluó la toxicidad aguda, repelencia y fagodisuación alimenticia de las cenizas volcánicas (VA) en adultos de Sitophilus oryzae y en condiciones de laboratorio. VA causó mortalidad significativa de S. oryzae. Su toxicidad aguda fue similar a la de la tierra de diatomeas comercial DiatomiD ® demostrando su potencial como producto insecticida. Los valores de concentración letal media (CL50) obtenidos fueron de 1610 [1449, 1778] mg/kg para VA y 1046 [916, 1168] mg/kg para DiatomiD ®. De manera similar a otros polvos inertes, la distribución del tamaño de partícula de VA es bi-modal con una porosidad que aumenta su área de superficie. Entre las partículas más pequeñas, la más alta carga volumétrica estaba cerca de 5 mm con una distribución de partículas más pequeñas alcanzando un máximo de 0,5 mm. Los resultados indican que la VA no es repelente para S. oryzae. De hecho, se observó una respuesta de "acoplamiento" o aumento de la interacción de los insectos con la superficie tratada con VA. Sin embargo, los índices de fagodisuasión alimenticia mostraron que tanto la tierra de diatomeas como la VA tuvieron una fuerte acción disuasiva de la alimentación. Los resultados sugieren que los insectos se pondrán en contacto con el polvo de una superficie tratada con VA dado que no hay repelencia, conduciendo a la mortalidad de los mismos por la adhesión de las partículas de VA a la cutícula. Sin embargo, los insectos prefieren alimentarse en sitios sin VA y esto podría tener un impacto positivo en su uso para el manejo de insectos. Asociación Argentina de Ecología 2014-04-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/33 10.25260/EA.14.24.1.0.33 Ecología Austral; Vol. 24 No. 1 (2014): April 2014, Pages 1-132; 17-22 Ecología Austral; Vol. 24 Núm. 1 (2014): April 2014, Pages 1-132; 17-22 1667-782X 0327-5477 eng https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/33/36 Derechos de autor 2014 Micaela Buteler, Guillermo P. López García, Arístides A. Pochettino, Natalia Stefanazzi, Adriana A. Ferrero, Teodoro Stadler https://creativecommons.org/licenses/by/3.0/ |
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Buteler, Micaela López García, Guillermo P. Pochettino, Arístides A. Stefanazzi, Natalia Ferrero, Adriana A. Stadler, Teodoro |
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Buteler, Micaela López García, Guillermo P. Pochettino, Arístides A. Stefanazzi, Natalia Ferrero, Adriana A. Stadler, Teodoro Insecticidal activity of volcanic ash against Sitophilus oryzae L. (Coleoptera: Curculionidae) under laboratory conditions |
| author_facet |
Buteler, Micaela López García, Guillermo P. Pochettino, Arístides A. Stefanazzi, Natalia Ferrero, Adriana A. Stadler, Teodoro |
| author_sort |
Buteler, Micaela |
| title |
Insecticidal activity of volcanic ash against Sitophilus oryzae L. (Coleoptera: Curculionidae) under laboratory conditions |
| title_short |
Insecticidal activity of volcanic ash against Sitophilus oryzae L. (Coleoptera: Curculionidae) under laboratory conditions |
| title_full |
Insecticidal activity of volcanic ash against Sitophilus oryzae L. (Coleoptera: Curculionidae) under laboratory conditions |
| title_fullStr |
Insecticidal activity of volcanic ash against Sitophilus oryzae L. (Coleoptera: Curculionidae) under laboratory conditions |
| title_full_unstemmed |
Insecticidal activity of volcanic ash against Sitophilus oryzae L. (Coleoptera: Curculionidae) under laboratory conditions |
| title_sort |
insecticidal activity of volcanic ash against sitophilus oryzae l. (coleoptera: curculionidae) under laboratory conditions |
| description |
Ecología Austral, 24:17-22 (2014)This study assessed the acute toxicity and repellence as well as feeding deterrence effect of volcanic ash (VA) on Sitophilus oryzae adults under laboratory conditions. VA resulted in significant adult mortality of S. oryzae. Acute toxicity of the VA was similar to that of commercially available diatomaceous earth DiatomiD® demonstrating its insecticidal potential. Median lethal concentration values (LC50) obtained were 1610 [1449, 1778] mg/kg for VA and 1046 [916, 1168] mg/kg for DiatomiD®.Similarly to other inert dusts, VA particle size shows a bi-modal distribution and porosity which increases its surface area. Among the smallest particles, the highest volumetric loading was close to 5 mm with a distribution of smaller particles peaking at 0.5mm. Results indicate that VA is not repellent to S. oryzae. An “engagement” response or increased interaction of the insects with the VA treated surface was observed. However, feeding deterrence indices showed that both VA and diatomaceous earth had strong feeding deterrent action. Contact of insects with VA may lead to mortality by adherence of the VA particles to the insect cuticle. However, insects prefer feeding on sites without VA covered substrates and this could have a positive impact on its use for pest management. |
| publisher |
Asociación Argentina de Ecología |
| publishDate |
2014 |
| url |
https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/33 |
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