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Shaiene M.pt-br Gouvêa - One of the best experts on this subject based on the ideXlab platform.

  • Effects of paracress (Acmella oleracea) extracts on the aphids Myzus persicae and Lipaphis erysimi and two natural enemies
    Industrial Crops and Products, 2019
    Co-Authors: Ribeiro Arthur, Farias, Elizeu S., Picanço, Marcelo C., Shaiene M.pt-br Gouvêa, Carvalho, Geraldo A., Fidelis, Elisangela G.
    Abstract:

    EntomologiaThis study was conducted to evaluate the toxicity of paracress (Acmella oleracea) extracts to the aphids Myzus persicae (Sulz.) and Lipaphis erysimi (Kalt.) (Hemiptera: Aphididae), and the extracts selectivity to the aphid parasitoid Diaeretiella rapae McIntosh (Hymenoptera: Braconidae) and to the predator Orius insidiosus (Say) (Hemiptera: Anthocoridae). We evaluated water and ethanol extracts from A. oleracea. The ethanol extract caused 90% mortality of both aphid species within 70 h and reduced their fecundity, whereas the water extract was inactive. In addition, this extract caused no mortality of the natural enemies. In an attempt to identify bioactive compounds in the ethanol extract, three alkamides, spilanthol, undeca-2E-en-8,10-diynoic acid isobutylamide (compound 2) and (2E)-N-(2-methylbutyl)-2-undecene-8,10-diynamide (compound 3), were isolated and tested on L. erysimi. From the isolated alkamides, spilanthol and compound 2 showed high insecticidal activity against L. erysimi, indicating that they contributed to the observed extract activity. The results of this study demonstrate the potential of the ethanol extract of A. oleracea as a botanical insecticide in the management of aphids in brassicas

  • effects of paracress acmella oleracea extracts on the aphids myzus persicae and lipaphis erysimi and two natural enemies
    Industrial Crops and Products, 2019
    Co-Authors: Shaiene M.pt-br Gouvêa, Geraldo Andrade Carvalho, Elisangela Gomes Fidelis, Arthur V Ribeiro, Elizeu S Farias, Marcelo Coutinho Picanco
    Abstract:

    Abstract This study was conducted to evaluate the toxicity of paracress (Acmella oleracea) extracts to the aphids Myzus persicae (Sulz.) and Lipaphis erysimi (Kalt.) (Hemiptera: Aphididae), and the extracts selectivity to the aphid parasitoid Diaeretiella rapae McIntosh (Hymenoptera: Braconidae) and to the predator Orius insidiosus (Say) (Hemiptera: Anthocoridae). We evaluated water and ethanol extracts from A. oleracea. The ethanol extract caused 90% mortality of both aphid species within 70 h and reduced their fecundity, whereas the water extract was inactive. In addition, this extract caused no mortality of the natural enemies. In an attempt to identify bioactive compounds in the ethanol extract, three alkamides, spilanthol, undeca-2E-en-8,10-diynoic acid isobutylamide (compound 2) and (2E)-N-(2-methylbutyl)-2-undecene-8,10-diynamide (compound 3), were isolated and tested on L. erysimi. From the isolated alkamides, spilanthol and compound 2 showed high insecticidal activity against L. erysimi, indicating that they contributed to the observed extract activity. The results of this study demonstrate the potential of the ethanol extract of A. oleracea as a botanical insecticide in the management of aphids in brassicas.

Marcelo Coutinho Picanco - One of the best experts on this subject based on the ideXlab platform.

  • effects of paracress acmella oleracea extracts on the aphids myzus persicae and lipaphis erysimi and two natural enemies
    Industrial Crops and Products, 2019
    Co-Authors: Shaiene M.pt-br Gouvêa, Geraldo Andrade Carvalho, Elisangela Gomes Fidelis, Arthur V Ribeiro, Elizeu S Farias, Marcelo Coutinho Picanco
    Abstract:

    Abstract This study was conducted to evaluate the toxicity of paracress (Acmella oleracea) extracts to the aphids Myzus persicae (Sulz.) and Lipaphis erysimi (Kalt.) (Hemiptera: Aphididae), and the extracts selectivity to the aphid parasitoid Diaeretiella rapae McIntosh (Hymenoptera: Braconidae) and to the predator Orius insidiosus (Say) (Hemiptera: Anthocoridae). We evaluated water and ethanol extracts from A. oleracea. The ethanol extract caused 90% mortality of both aphid species within 70 h and reduced their fecundity, whereas the water extract was inactive. In addition, this extract caused no mortality of the natural enemies. In an attempt to identify bioactive compounds in the ethanol extract, three alkamides, spilanthol, undeca-2E-en-8,10-diynoic acid isobutylamide (compound 2) and (2E)-N-(2-methylbutyl)-2-undecene-8,10-diynamide (compound 3), were isolated and tested on L. erysimi. From the isolated alkamides, spilanthol and compound 2 showed high insecticidal activity against L. erysimi, indicating that they contributed to the observed extract activity. The results of this study demonstrate the potential of the ethanol extract of A. oleracea as a botanical insecticide in the management of aphids in brassicas.

  • conservation of natural enemies in brassica crops comparative selectivity of insecticides in the management of brevicoryne brassicae hemiptera sternorrhyncha aphididae
    Applied Entomology and Zoology, 2009
    Co-Authors: Leandro Bacci, Marcelo Coutinho Picanco, Jander Fagundes Rosado, Gerson Adriano Silva, Andre L B Crespo, E J G Pereira, Julio Claudio Martins
    Abstract:

    In the present study, we evaluate the toxicity of six insecticides to Brevicoryne brassicae (L.) (Hemiptera: Sternorrhyncha: Aphididae), predatory coleopterans Cycloneda sanguinea (L.) (Coccinellidae) and Acanthinus sp. (Anthicidae), and the hymenopteran parasitoid Diaeretiella rapae (McIntosh) (Braconidae, Aphidiinae). Late-instar nymphs of B. brassicae and adults of C. sanguinea, Acanthinus sp. and D. rapae were exposed to nine concentrations of acephate, deltamethrin, dimethoate, methamidophos, methyl parathion and pirimicarb. Selectivity, toxicity, and tolerance ratios were calculated from LC50 values to determine insecticide toxicity to B. brassicae and natural enemies as well as insecticide tolerance of the natural enemies. Pirimicarb was highly selective to Acanthinus sp., C. sanguinea, and D. rapae. Dimethoate, methamidophos and methyl parathion also showed selectivity to C. sanguinea and Acanthinus sp., but not to D. rapae. Methamidophos was the least potent insecticide against B. brassicae exhibiting the highest LC50 amongst the products tested and was more toxic to the D. rapae relative to the aphid. Overall, the predators Acanthinus sp. and C. sanguinea were more tolerant to the insecticides than was the parasitoid D. rapae. The role of insecticides in IPM systems of brassica crops is discussed based on the toxicity to B. brassicae and selectivity to natural enemies.

J. A. Pickett - One of the best experts on this subject based on the ideXlab platform.

  • A Comparison of Semiochemically Mediated Interactions Involving Specialist and Generalist Brassica-feeding Aphids and the Braconid Parasitoid Diaeretiella rapae
    Journal of Chemical Ecology, 2007
    Co-Authors: J. D. Blande, J. A. Pickett, G. M. Poppy
    Abstract:

    Diaeretiella rapae , a parasitoid that predominately specializes in the parasitism of Brassica -feeding aphids, attacks Lipaphis erysimi , a specialist feeding aphid of the Brassicaceae and other families in the Capparales, at a greater rate than the generalist-feeding aphid, Myzus persicae . In this study, we investigated the orientation behavior of D. rapae to the volatile chemicals produced when these two aphid species feed on turnip ( Brassica rapa var rapifera ). We showed no significant preference orientation behavior to either aphid/turnip complex over the other. Isothiocyanates are among the compounds emitted by plants of the Brassicaceae in response to insect feeding damage, including by aphids. We assessed parasitoid orientation behavior in response to laboratory-formulated isothiocyanates. We tested two formulations and discovered significant orientation toward 3-butenyl isothiocyanate. We also assessed plant and aphid glucosinolate content, and showed large levels of glucosinolate concentration in L. erysimi , whereas there was little change in plant content in response to aphid feeding. Our results suggest that during the process of host location, similar cues may be utilized for locating L. erysimi and M. persicae , whereas the acceptance of hosts and their suitability may involve aspects of nonvolatile aphid chemistry.

  • aphid alarm pheromone produced by transgenic plants affects aphid and parasitoid behavior
    Proceedings of the National Academy of Sciences of the United States of America, 2006
    Co-Authors: Michael H Beale, Michael A Birkett, Toby J A Bruce, Keith Chamberlain, Linda M Field, Alison K Huttly, J L Martin, Rachel Parker, Andrew L Phillips, J. A. Pickett
    Abstract:

    The alarm pheromone for many species of aphids, which causes dispersion in response to attack by predators or parasitoids, consists of the sesquiterpene (E)-β-farnesene (Eβf). We used high levels of expression in Arabidopsis thaliana plants of an Eβf synthase gene cloned from Mentha × piperita to cause emission of pure Eβf. These plants elicited potent effects on behavior of the aphid Myzus persicae (alarm and repellent responses) and its parasitoid Diaeretiella rapae (an arrestant response). Here, we report the transformation of a plant to produce an insect pheromone and demonstrate that the resulting emission affects behavioral responses at two trophic levels.

  • aphid alarm pheromone produced by transgenic plants affects aphid and parasitoid behavior
    Proceedings of the National Academy of Sciences of the United States of America, 2006
    Co-Authors: Michael H Beale, Michael A Birkett, Toby J A Bruce, Keith Chamberlain, Linda M Field, Alison K Huttly, J L Martin, Rachel Parker, Andrew L Phillips, J. A. Pickett
    Abstract:

    The alarm pheromone for many species of aphids, which causes dispersion in response to attack by predators or parasitoids, consists of the sesquiterpene (E)-β-farnesene (Eβf). We used high levels of expression in Arabidopsis thaliana plants of an Eβf synthase gene cloned from Mentha × piperita to cause emission of pure Eβf. These plants elicited potent effects on behavior of the aphid Myzus persicae (alarm and repellent responses) and its parasitoid Diaeretiella rapae (an arrestant response). Here, we report the transformation of a plant to produce an insect pheromone and demonstrate that the resulting emission affects behavioral responses at two trophic levels.

Fidelis, Elisangela G. - One of the best experts on this subject based on the ideXlab platform.

  • Effects of paracress (Acmella oleracea) extracts on the aphids Myzus persicae and Lipaphis erysimi and two natural enemies
    Industrial Crops and Products, 2019
    Co-Authors: Ribeiro Arthur, Farias, Elizeu S., Picanço, Marcelo C., Shaiene M.pt-br Gouvêa, Carvalho, Geraldo A., Fidelis, Elisangela G.
    Abstract:

    EntomologiaThis study was conducted to evaluate the toxicity of paracress (Acmella oleracea) extracts to the aphids Myzus persicae (Sulz.) and Lipaphis erysimi (Kalt.) (Hemiptera: Aphididae), and the extracts selectivity to the aphid parasitoid Diaeretiella rapae McIntosh (Hymenoptera: Braconidae) and to the predator Orius insidiosus (Say) (Hemiptera: Anthocoridae). We evaluated water and ethanol extracts from A. oleracea. The ethanol extract caused 90% mortality of both aphid species within 70 h and reduced their fecundity, whereas the water extract was inactive. In addition, this extract caused no mortality of the natural enemies. In an attempt to identify bioactive compounds in the ethanol extract, three alkamides, spilanthol, undeca-2E-en-8,10-diynoic acid isobutylamide (compound 2) and (2E)-N-(2-methylbutyl)-2-undecene-8,10-diynamide (compound 3), were isolated and tested on L. erysimi. From the isolated alkamides, spilanthol and compound 2 showed high insecticidal activity against L. erysimi, indicating that they contributed to the observed extract activity. The results of this study demonstrate the potential of the ethanol extract of A. oleracea as a botanical insecticide in the management of aphids in brassicas

Ribeiro Arthur - One of the best experts on this subject based on the ideXlab platform.

  • Effects of paracress (Acmella oleracea) extracts on the aphids Myzus persicae and Lipaphis erysimi and two natural enemies
    Industrial Crops and Products, 2019
    Co-Authors: Ribeiro Arthur, Farias, Elizeu S., Picanço, Marcelo C., Shaiene M.pt-br Gouvêa, Carvalho, Geraldo A., Fidelis, Elisangela G.
    Abstract:

    EntomologiaThis study was conducted to evaluate the toxicity of paracress (Acmella oleracea) extracts to the aphids Myzus persicae (Sulz.) and Lipaphis erysimi (Kalt.) (Hemiptera: Aphididae), and the extracts selectivity to the aphid parasitoid Diaeretiella rapae McIntosh (Hymenoptera: Braconidae) and to the predator Orius insidiosus (Say) (Hemiptera: Anthocoridae). We evaluated water and ethanol extracts from A. oleracea. The ethanol extract caused 90% mortality of both aphid species within 70 h and reduced their fecundity, whereas the water extract was inactive. In addition, this extract caused no mortality of the natural enemies. In an attempt to identify bioactive compounds in the ethanol extract, three alkamides, spilanthol, undeca-2E-en-8,10-diynoic acid isobutylamide (compound 2) and (2E)-N-(2-methylbutyl)-2-undecene-8,10-diynamide (compound 3), were isolated and tested on L. erysimi. From the isolated alkamides, spilanthol and compound 2 showed high insecticidal activity against L. erysimi, indicating that they contributed to the observed extract activity. The results of this study demonstrate the potential of the ethanol extract of A. oleracea as a botanical insecticide in the management of aphids in brassicas