Efeito do Estádio Fenológico do Milho (Zea mays L.) Sobre a Infestação pelo Pulgão Rhopalosiphum maidis (Fitch, 1856)

Maia, W. J. M. S.; Cruz, I.; Carvalho, César Freire; Souza, Bruno Araújo de; Waquil, J. M.; Pinho, Renzo Garcia Von; Carvalho, Samuel Pereira de; Maia, Terezinha J. A. Ferreira; Loureiro, Íñigo

doi:10.18512/1980-6477/rbms.v4n3p308-315

Cited by 3 publications

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“…Aphids that are able to transmit maize potyviruses were not found to be influenced in their abundance by the planting period at any growth stage in the present study. In [22], Maia et al studied the effect of the phenological stage of maize on the aphid infestation and concluded that there was a higher incidence of aphid colonies in the V4 stage, which has been recorded in other cereals [23]. In the case of MRDV, its vector, L. striatellus, did show significantly higher abundances in lateplanted fields but only at late growth stages; in this phenological stage, virus transmission is already complete [7,8,11] and the number of vectors is rather irrelevant when considering the virus incidence.…”

Section: Discussionmentioning

confidence: 99%

The Influence of Planting Periods on Herbivore and Natural Enemy Abundance on Yellow Sticky Traps in Bt Maize Fields

Clemente-Orta

Álvarez

Madeira

et al. 2022

Insects

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Knowledge of the insect densities during crop development is necessary for adopting appropriate measures for the control of insect pests and minimizing yield losses. Within integrated pest management programs, crop rotation has been carried out in recent years, but this current trend delays the planting period for Bt maize. The small amount of available information regarding the influence of sowing Bt maize early or late on the seasonal abundance of herbivores prompted us to study these aspects in two current common planting periods in northeastern Spain in 52 maize fields over three consecutive years. We sampled the fields planted on different dates with sticky yellow traps. Our results show that only the abundances of herbivore thrips, other than Frankliniella occidentalis, and Syrphidae were significantly different between the two planting periods. Moreover, when we performed yearly analyses, we found significant effects of the planting period on Coccinellidae and Chrysopidae in 2015 and on Aeolothrips sp. in 2016 and 2017. In most of the taxa, the abundance peaks in earlier growth stages, which is related to pollination (before or during). Only the abundances of Stethorus punctillum and Syrphidae peak later in the season. In addition, F. occidentalis, aphids, Syrphidae, and Coccinellidae registered higher abundance in fields sown in the late planting period. These results highlight the effects of sowing in different planting periods on insect dynamics in Bt maize and can be used to identify the abundance of certain pests and natural enemies in specific phenological stages of maize, which may allow producers to adopt better-integrated management and thus avoid reaching the level of economic damage.

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Section: Discussionmentioning

confidence: 99%

The Influence of Planting Periods on Herbivore and Natural Enemy Abundance on Yellow Sticky Traps in Bt Maize Fields

Clemente-Orta

Álvarez

Madeira

et al. 2022

Insects

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Spatial and Temporal Distribution of Leafhoppers (Hemiptera: Cicadellidae) in a Corn Field

et al. 2021

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Beauveria bassiana em associação com milho geneticamente modificado no manejo de Spodoptera frugiperda e Rhopalosiphum maidis

et al. 2016

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RESUMO: O objetivo deste trabalho foi avaliar a eficiência do fungo Beauveria bassiana (isolado CG 716) no manejo de Spodoptera frugiperda e Rhopalosiphum maidis em milho. Diante disso, montou-se um experimento em blocos ao acaso, utilizando parcelas subdivididas, contendo dez tratamentos e quatro repetições. Os tratamentos foram: B. bassiana , formulado em óleo vegetal, nas doses de 2,0, 4,0 e 6,0 x 1012 conídios ha-1, lambda-cialotrina (7,5 i.a. ha-1) e testemunha (sem aplicação). As aplicações foram realizadas a partir dos 10 dias após a emergência (DAE) das plantas, sendo repetidas aos 16, 23 e 31 DAE. As avaliações foram realizadas semanalmente coletando-se dez plantas consecutivas por parcela e armazenadas em sacos plásticos, para posterior destruição do cartucho e contagem de lagartas, pulgões e inimigos naturais em laboratório. Não ocorreram diferenças significativas em populações de S. frugiperda e R .maidis em lavouras de milho submetidas ou não a aplicações de defensivos; entretanto, na variedade convencional, aos 40 DAE, foi constatado que um maior número médio pulgõessob aplicação do bioinseticida na dosagem de 2,0 x 1012 conídios ha-1. B. bassiana ,em associação com a tecnologia Bt , não produziu resultados satisfatórios no controle de S. frugiperda e R. maidis nas condições em que foi testado.

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Efeito do Estádio Fenológico do Milho (Zea mays L.) Sobre a Infestação pelo Pulgão Rhopalosiphum maidis (Fitch, 1856)

Cited by 3 publications

References 0 publications

The Influence of Planting Periods on Herbivore and Natural Enemy Abundance on Yellow Sticky Traps in Bt Maize Fields

The Influence of Planting Periods on Herbivore and Natural Enemy Abundance on Yellow Sticky Traps in Bt Maize Fields

Spatial and Temporal Distribution of Leafhoppers (Hemiptera: Cicadellidae) in a Corn Field

Beauveria bassiana em associação com milho geneticamente modificado no manejo de Spodoptera frugiperda e Rhopalosiphum maidis

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