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Boletín de la Sociedad Zoológica del Uruguay
Article . 2020 . Peer-reviewed
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ABUNDANCIA Y FENOLOGÍA DE ARTRÓPODOS DEPREDADORES EN SOJA: ANÁLISIS PRELIMINAR

Authors: Lacava, Mariángeles; García, Luis Fernando; Burla, Juan; Tambasco, Ramiro; Franco, Viviana; Viera, Carmen;

ABUNDANCIA Y FENOLOGÍA DE ARTRÓPODOS DEPREDADORES EN SOJA: ANÁLISIS PRELIMINAR

Abstract

Los artrópodos son organismos que se han adaptado a múltiples ecosistemas, incluyendo los agroecosistemas. La soja es un agroecosistema que ha sufrido una gran expansión y también la fauna acompañante. El conocimiento de esta fauna es escaso en Uruguay, fundamentalmente la de artrópodos depredadores, agentes de control biológico conservativo. En este trabajo se evaluó la fauna de depredadores de suelo en etapas fenológicas de germinación, primer nudo, floración, y llenado de grano. Se recolectó la fauna mediante trampas pitfall a lo largo y ancho del cultivo, y en zonas aledañas, con vegetación natural. Las familias predominantes fueron Lycosidae (Araneae), Carabidae (Coleoptera) y Formicidae (Hymenoptera). En general los índices de diversidad mostraron menores valores en la etapa de llenado de grano. Se encontró una interacción significativa entre el orden y la abundancia de artrópodos con una dominancia consistente de las arañas a lo largo de la mayoría de etapas fenológicas. En general, estos resultados preliminares, coinciden con otros estudios realizados a nivel regional. Se deberán muestrear otros sitios en diferentes zonas del país para evaluar si se mantiene la tendencia encontrada. Además, es necesario evaluar la eficacia de los depredadores encontrados sobre insectos-plaga de soja.

Arthropods are organisms that have been able to adapt to multiple ecosystems, including agroecosystems. Soybean is an agroecosystem that has undergone great expansion and also the accompanying fauna. The knowledge of this fauna is scarce in Uruguay, mainly for native predatory arthropods, agents of conservative biological control. In the present work, the fauna of soil predators is evaluated in the phenological stages of germination, first node, flowering, and grain filling. The fauna was collected by pitfall traps throughout the crop, and in surrounding areas, with natural vegetation. The predominant families were Lycosidae (Araneae), Carabidae (Coleoptera) and Formicidae (Hymenoptera). The diversity varied across phenological stages, being lower in the grain filling stage. We also found a significant interaction between the phenological stage, and arthropod order abundance, where spiders were one of the most abundant groups. Overall,these preliminary results agree with other studies carried out in soybean and other crops. Other sites in different areas of the country should be sampled to assess whether the trend found is maintained. Furthermore, it is necessary to evaluate together with the abundance the predatory efficacy of the groups in soybean insects-plague.

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Keywords

Etapas- fenológicas, Soja, Artrópodos-depredadores, Control-conservativo

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
1
Average
Average
Average
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