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Within-plant distribution of cotton aphids, Aphis gossypii Glover (Hemiptera: Aphididae), in Bt and non-Bt cotton fields

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dc.contributor.author Fernandes, F. S.
dc.contributor.author Ramalho, F. S.
dc.contributor.author Nascimento Junior, J. L.
dc.contributor.author Malaquias, J. B.
dc.contributor.author Nascimento, A. R. B.
dc.contributor.author Silva, C. A. D.
dc.contributor.author Zanuncio, J. C.
dc.date.accessioned 2018-12-21T11:37:40Z
dc.date.available 2018-12-21T11:37:40Z
dc.date.issued 2012-02
dc.identifier.issn 1475-2670
dc.identifier.uri http://dx.doi.org/10.1017/S0007485311000381
dc.identifier.uri http://www.locus.ufv.br/handle/123456789/22882
dc.description.abstract Knowledge of the vertical and horizontal distribution of Aphis gossypii Glover (Hemiptera: Aphididae) on genetically modified cotton plants over time could help optimize decision-making in integrated cotton aphid management programs. Therefore, the aim of the present study was to determine the vertical and horizontal distribution of A. gossypii in non-transgenic Bt cotton and transgenic Bt-cotton over time during two cotton seasons by examining plants throughout the seasons. There was no significant interaction between years and cotton cultivar treatments for apterous or alate aphids. Considering year-to-year data, analyses on season-long averages of apterous or alate aphids showed that aphid densities per plant did not differ among years. The number of apterous aphids found per plant for the Bt transgenic cultivar (2427 apterous aphids per plant) was lower than for its isoline (3335 apterous aphids per plant). The number of alate aphids found per plant on the Bt transgenic cultivar (12.28 alate aphids per plant) was lower than for the isoline (140.56 alate aphids per plant). With regard to the vertical distribution of apterous aphids or alate aphids, there were interactions between cotton cultivar, plant age and plant region. We conclude that in comparison to non-Bt cotton (DP 4049), Bt cotton (DP 404 BG (Bollgard)) has significant effects on the vertical, horizontal, spatial and temporal distribution patterns of A. gossypii, showing changes in its distribution behaviour inside the plant as the cotton crop develops. The results of our study are relevant for understanding the vertical and horizontal distribution of A. gossypii on Bt cotton cultivar (DP 404 BG (Bollgard)) and on its isoline (DP 4049), and could be useful in decision-making, implementing controls and determining the timing of population peaks of this insect. en
dc.format pdf pt-BR
dc.language.iso eng pt-BR
dc.publisher Bulletin of Entomological Research pt-BR
dc.relation.ispartofseries Volume 102, Issue 1, Pages 79- 87, February 2012 pt-BR
dc.rights Open Access pt-BR
dc.subject Cotton aphid pt-BR
dc.subject Transgenic plants pt-BR
dc.subject Non- target effect pt-BR
dc.subject Dynamic pt-BR
dc.subject Behaviour pt-BR
dc.subject Vertical distribution pt-BR
dc.subject Horizontal distribution pt-BR
dc.subject Cry1Ac protein pt-BR
dc.title Within-plant distribution of cotton aphids, Aphis gossypii Glover (Hemiptera: Aphididae), in Bt and non-Bt cotton fields en
dc.type Artigo pt-BR


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  • Artigos [579]
    Artigos Técnico-científicos na área de Biologia Animal

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