Insecticidal effects of plant extracts on immature whitefly Bemisia tabaci Genn. (Hemiptera: Aleyroideae)

Background: The whitefly (Bemisia tabaci Genn.) is a widely distributed and highly harmful plant pest species. The management of B. tabaci has been typically carried out by chemical pesticides. In the last decade however, there has been an increasing interest in natural products, particularly those...

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Autores principales:	Cruz-Estrada,Angel, Gamboa-Angulo,Marcela, Borges-Argáez,Rocío, Ruiz-Sánchez,Esaú
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso 2013
Materias:	Annona squamosa Bemisia tabaci botanical insecticides plant extracts Petiveria alliaceae
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000100006
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spelling	oai:scielo:S0717-345820130001000062013-01-21Insecticidal effects of plant extracts on immature whitefly Bemisia tabaci Genn. (Hemiptera: Aleyroideae)Cruz-Estrada,AngelGamboa-Angulo,MarcelaBorges-Argáez,RocíoRuiz-Sánchez,Esaú Annona squamosa Bemisia tabaci botanical insecticides plant extracts Petiveria alliaceae Background: The whitefly (Bemisia tabaci Genn.) is a widely distributed and highly harmful plant pest species. The management of B. tabaci has been typically carried out by chemical pesticides. In the last decade however, there has been an increasing interest in natural products, particularly those of plant origin, to control this pest species. In the present work, aqueous and ethanolic extracts of native plants from the flora of the Yucatán peninsula (Acalypha gaumeri, Annona squamosa, Carlowrightia myriantha, Petiveria alliaceae and Trichilia arborea) and the introduced plant Azadirachta indica were collected and evaluated for insecticidal activity against eggs and nymphs Bemisia tabaci. Results: Most of the aqueous and ethanolic extracts showed high insecticidal effects on B. tabaci eggs. The lowest LC50 values were recorded in the aqueous extracts of A. gaumeri (0.39% w/v), A. squamosa (0.36% w/v), P. alliaceae (0.42% w/v) and A. indica (0.30% /v), as well as in the ethanolic extracts of P. alliaceae (2.09 mg mL-1) and T. arborea (2.14 mg mL-1). On the other hand, B. tabaci nymphs were not affected by the aqueous extracts, but were highly sensitive to the ethanolic extracts of the tested plants. The lowest LC50 values were recorded in the ethanolic extracts of P. alliaceae (1.27 mg ml-1) and T. arborea (1.61 mg mL-1). The GC-MS analysis showed that phytol was the major component of the ethanolic extract of P. alliaceae and fatty acids were the major components of ethanolic extract of T. arborea. Conclusions: Overall, results suggest that ethanolic extracts of P. alliaceae and T. arborea leaves showed the highest insecticidal effects on eggs and nymphs B. tabaci. The extracts from P. alliaceae and T. arborea are good candidates to be developed as sources of natural insecticides for the management of immature B. tabaci since their effects were comparable with that showed by the extracts of A. indica, a well-known plant species for its insecticidal activity.info:eu-repo/semantics/openAccessPontificia Universidad Católica de ValparaísoElectronic Journal of Biotechnology v.16 n.1 20132013-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000100006en10.2225/vol16-issue1-fulltext-6
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Annona squamosa Bemisia tabaci botanical insecticides plant extracts Petiveria alliaceae
spellingShingle	Annona squamosa Bemisia tabaci botanical insecticides plant extracts Petiveria alliaceae Cruz-Estrada,Angel Gamboa-Angulo,Marcela Borges-Argáez,Rocío Ruiz-Sánchez,Esaú Insecticidal effects of plant extracts on immature whitefly Bemisia tabaci Genn. (Hemiptera: Aleyroideae)
description	Background: The whitefly (Bemisia tabaci Genn.) is a widely distributed and highly harmful plant pest species. The management of B. tabaci has been typically carried out by chemical pesticides. In the last decade however, there has been an increasing interest in natural products, particularly those of plant origin, to control this pest species. In the present work, aqueous and ethanolic extracts of native plants from the flora of the Yucatán peninsula (Acalypha gaumeri, Annona squamosa, Carlowrightia myriantha, Petiveria alliaceae and Trichilia arborea) and the introduced plant Azadirachta indica were collected and evaluated for insecticidal activity against eggs and nymphs Bemisia tabaci. Results: Most of the aqueous and ethanolic extracts showed high insecticidal effects on B. tabaci eggs. The lowest LC50 values were recorded in the aqueous extracts of A. gaumeri (0.39% w/v), A. squamosa (0.36% w/v), P. alliaceae (0.42% w/v) and A. indica (0.30% /v), as well as in the ethanolic extracts of P. alliaceae (2.09 mg mL-1) and T. arborea (2.14 mg mL-1). On the other hand, B. tabaci nymphs were not affected by the aqueous extracts, but were highly sensitive to the ethanolic extracts of the tested plants. The lowest LC50 values were recorded in the ethanolic extracts of P. alliaceae (1.27 mg ml-1) and T. arborea (1.61 mg mL-1). The GC-MS analysis showed that phytol was the major component of the ethanolic extract of P. alliaceae and fatty acids were the major components of ethanolic extract of T. arborea. Conclusions: Overall, results suggest that ethanolic extracts of P. alliaceae and T. arborea leaves showed the highest insecticidal effects on eggs and nymphs B. tabaci. The extracts from P. alliaceae and T. arborea are good candidates to be developed as sources of natural insecticides for the management of immature B. tabaci since their effects were comparable with that showed by the extracts of A. indica, a well-known plant species for its insecticidal activity.
author	Cruz-Estrada,Angel Gamboa-Angulo,Marcela Borges-Argáez,Rocío Ruiz-Sánchez,Esaú
author_facet	Cruz-Estrada,Angel Gamboa-Angulo,Marcela Borges-Argáez,Rocío Ruiz-Sánchez,Esaú
author_sort	Cruz-Estrada,Angel
title	Insecticidal effects of plant extracts on immature whitefly Bemisia tabaci Genn. (Hemiptera: Aleyroideae)
title_short	Insecticidal effects of plant extracts on immature whitefly Bemisia tabaci Genn. (Hemiptera: Aleyroideae)
title_full	Insecticidal effects of plant extracts on immature whitefly Bemisia tabaci Genn. (Hemiptera: Aleyroideae)
title_fullStr	Insecticidal effects of plant extracts on immature whitefly Bemisia tabaci Genn. (Hemiptera: Aleyroideae)
title_full_unstemmed	Insecticidal effects of plant extracts on immature whitefly Bemisia tabaci Genn. (Hemiptera: Aleyroideae)
title_sort	insecticidal effects of plant extracts on immature whitefly bemisia tabaci genn. (hemiptera: aleyroideae)
publisher	Pontificia Universidad Católica de Valparaíso
publishDate	2013
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000100006
work_keys_str_mv	AT cruzestradaangel insecticidaleffectsofplantextractsonimmaturewhiteflybemisiatabacigennhemipteraaleyroideae AT gamboaangulomarcela insecticidaleffectsofplantextractsonimmaturewhiteflybemisiatabacigennhemipteraaleyroideae AT borgesargaezrocio insecticidaleffectsofplantextractsonimmaturewhiteflybemisiatabacigennhemipteraaleyroideae AT ruizsanchezesau insecticidaleffectsofplantextractsonimmaturewhiteflybemisiatabacigennhemipteraaleyroideae
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Insecticidal effects of plant extracts on immature whitefly Bemisia tabaci Genn. (Hemiptera: Aleyroideae)

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