Spiders of soybean crops in Santa Fe Province, Argentina: Influence of surrounding spontaneous vegetation on lot colonization

Trials during two consecutive soybean cycles were performed in central Santa Fe in order to determine the main spider families present in the crop and to determine the influence of spontaneous margin flora on colonization towards the lot. Samplings were done by sweeping net and pitfall traps. It was concluded that: 1. Oxyopidae was the most frequent family in the herbaceous layer of both the margins and the soybean crop, and Lycosidae in the lower layer; 2. Margin strips in a soybean lot contribute to the colonization of the crop by spiders of aerial habits and also promote re-colonization following pesticide applications, since they act as shelters. The influence on spiders of terrestrial habits was somewhat lower; 3. The distribution of the populations of spiders of terrestrial habits was homogeneous in a soybean crop seeded directly and these predators had a greater capacity to control pests at all points of the lot.Centro de Estudios Parasitológicos y de Vectore

New records of two species of Toxotrypana (Diptera: Tephritidae) in Argentina

En este estudio se dan a conocer nuevos registros y se extiende la distribución geográfica de Toxotrypana australis Blanchard y T. nigra Blanchard en la Argentina.In this study are disclosed new records that extend the geographical distribution of Toxotrypana australis Blanchard and T. nigra Blanchard, in Argentina.Fil: Bertolaccini, Isabel. Universidad Nacional del LitoralFil: Castro, Damian. Universidad Nacional del LitoralFil: Curis, María Cecilia. Universidad Nacional del LitoralFil: Zucchi, Roberto A.. Escola Superior de Agricultura Luiz de Queiroz (Sao Paulo, Brasil). Departamento de Entomologia e Acarologi

A new genus and species of Eucoilinae (Hymenoptera, Cynipoidea, Figitidae) parasitoid of Euxesta eluta Loew (Diptera, Otitidae) attacked Bt sweet corn in Argentina

Euxestophaga Gallardo, a new genus of Eucoilinae (Hymenoptera, Cynipoidea, Figitidae) and Euxestophaga argentinensis Gallardo, sp. n. from Argentina, are described and illustrated. This new genus belongs to the Ganaspini and morphologically resembles Epicoela Borgmeier and Striatovertex Schick, Forshage and Nordlander. A key to differentiate these genera is given. Specimens were reared from pupae of Euxesta eluta Loew (Diptera: Otitidae), attacked Bt sweet corn in Santa Fe province and other in Tucumán province (Argentina)

Spiders of soybean crops in Santa Fe Province, Argentina: Influence of surrounding spontaneous vegetation on lot colonization

Trials during two consecutive soybean cycles were performed in central Santa Fe in order to determine the main spider families present in the crop and to determine the influence of spontaneous margin flora on colonization towards the lot. Samplings were done by sweeping net and pitfall traps. It was concluded that: 1. Oxyopidae was the most frequent family in the herbaceous layer of both the margins and the soybean crop, and Lycosidae in the lower layer; 2. Margin strips in a soybean lot contribute to the colonization of the crop by spiders of aerial habits and also promote re-colonization following pesticide applications, since they act as shelters. The influence on spiders of terrestrial habits was somewhat lower; 3. The distribution of the populations of spiders of terrestrial habits was homogeneous in a soybean crop seeded directly and these predators had a greater capacity to control pests at all points of the lot.Centro de Estudios Parasitológicos y de Vectore

A new genus and species of Eucoilinae (Hymenoptera, Cynipoidea, Figitidae) parasitoid of Euxesta eluta Loew (Diptera, Otitidae) attacked Bt sweet corn in Argentina

Euxestophaga Gallardo, a new genus of Eucoilinae (Hymenoptera, Cynipoidea, Figitidae) and Euxestophaga argentinensis Gallardo, sp. n. from Argentina, are described and illustrated. This new genus belongs to the Ganaspini and morphologically resembles Epicoela Borgmeier and Striatovertex Schick, Forshage and Nordlander. A key to differentiate these genera is given. Specimens were reared from pupae of Euxesta eluta Loew (Diptera: Otitidae), attacked Bt sweet corn in Santa Fe province and other in Tucumán province (Argentina).El material suplementario de este artículo puede accederse haciendo clic en "Documentos relacionados".Facultad de Ciencias Naturales y Muse

A new genus and species of Eucoilinae (Hymenoptera, Cynipoidea, Figitidae) parasitoid of Euxesta eluta Loew (Diptera, Otitidae) attacked Bt sweet corn in Argentina

Euxestophaga Gallardo, a new genus of Eucoilinae (Hymenoptera, Cynipoidea, Figitidae) and Euxestophaga argentinensis Gallardo, sp. n. from Argentina, are described and illustrated. This new genus belongs to the Ganaspini and morphologically resembles Epicoela Borgmeier and Striatovertex Schick, Forshage and Nordlander. A key to differentiate these genera is given. Specimens were reared from pupae of Euxesta eluta Loew (Diptera: Otitidae), attacked Bt sweet corn in Santa Fe province and other in Tucumán province (Argentina).El material suplementario de este artículo puede accederse haciendo clic en "Documentos relacionados".Facultad de Ciencias Naturales y Muse

A new genus and species of Eucoilinae (Hymenoptera, Cynipoidea, Figitidae) parasitoid of Euxesta eluta Loew (Diptera, Otitidae) attacked Bt sweet corn in Argentina

Fil: Gallardo, Fabiana Edith. División Entomología. Facultad de Ciencias Naturales y Museo. Universidad Nacional de La Plata; ArgentinaFil: Reche, Vanina Anadina. Universidad Nacional del Litoral. Esperanza; ArgentinaFil: Bertolaccini, Isabel. Universidad Nacional del Litoral. Esperanza; ArgentinaFil: Zárate, Brenda. División Entomología. Facultad de Ciencias Naturales y Museo. Universidad Nacional de La Plata; ArgentinaFil: Curis, María Cecilia. Universidad Nacional del Litoral. Esperanza; Argentin

Diversity of carabids (order: coleoptera) and spiders (class: arachnida) in bt and conventional corn crops in the center of the province of Santa Fé, Argentina

El objetivo de este estudio fue cuantificar y comparar la diversidad de artrópodos benéficos de suelo de Coleopteros carabidae y del Orden Araneae, en cultivos de maíces Bt y convencionales. Anualmente se sembraron dos lotes de 1 ha, uno con maíz Bt y otro con maíz convencional, en la localidad de Pujato Norte, departamento Las Colonias, Santa Fe, Argentina, durante cinco campañas agrícolas (2005-2010). Para la captura de los artrópodos se utilizaron trampas de caída Pitfall, a razón de cuatro por lote. Los recuentos fueron semanales, desde la siembra hasta la cosecha. Se estimaron los siguientes índices ecológicos: abundancia relativa, diversidad de especies, equidad de Shannon, y se calculó el índice de Bray y Curtis para comparar las poblaciones de los dos cultivos. Las comparaciones se evaluaron mediante test no paramétrico de Mann-Whitney para datos apareados. No se hallaron diferencias en la diversidad ni en la abundancia de las especies de Carabidae y Araneae, ni en otras familias de artrópodos benéficos de suelo.The objective of this study was to quantify and compare the diversity of beneficial soil arthropods of Coleopteros carabidae and of the Araneae order, in conventional and Bt corn crops. Two plots of 1 ha were planted annually, one with Bt corn and another with conventional corn, in the town of Pujato Norte, department Las Colonias, Santa Fe, Argentina, between 2005 and 2010. Pitfall traps were used to capture arthropods at a capture rate of four per batch. Counts were conducted on weekly basis from sowing to harvest. The following ecological indices were estimated: relative abundance, species diversity and Shannon equity, while the Bray and Curtis index was calculated to compare the populations of the two crops. The comparisons were evaluated by a non-parametric Mann-Whitney test for paired data. No differences were found in the diversity or abundance of the Carabidae and Araneae species, or in other families of beneficial soil arthropods.Fil: Curis, Maria Cecilia. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; ArgentinaFil: Bertolaccini, Isabel. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; ArgentinaFil: Lutz, Alejandra. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; ArgentinaFil: Trod, María Amalia. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentin

Nuevos registros de dos especies de Toxotrypana (Diptera: Tephritidae) en la Argentina

In this study are disclosed new records that extend the geographical distribution of Toxotrypana australis Blanchard and T. nigra Blanchard, in Argentina.En este estudio se dan a conocer nuevos registros y se extiende la distribución geográfica de Toxotrypana australis Blanchard y T. nigra Blanchard en la Argentina

A new genus and species of Eucoilinae (Hymenoptera, Cynipoidea, Figitidae) parasitoid of Euxesta eluta Loew (Diptera, Otitidae) attacked Bt sweet corn in Argentina

Euxestophaga Gallardo, a new genus of Eucoilinae (Hymenoptera, Cynipoidea, Figitidae) and Euxestophaga argentinensis Gallardo, sp. n. from Argentina, are described and illustrated. This new genus belongs to the Ganaspini and morphologically resembles Epicoela Borgmeier and Striatovertex Schick, Forshage and Nordlander. A key to differentiate these genera is given. Specimens were reared from pupae of Euxesta eluta Loew (Diptera: Otitidae), attacked Bt sweet corn in Santa Fe province and other in Tucumán province (Argentina).El material suplementario de este artículo puede accederse haciendo clic en "Documentos relacionados".Facultad de Ciencias Naturales y Muse