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| FRANCESENA,NATALIA; ROCCA,MARGARITA; RIZZO,ESTEFANÍA; ARNEODO,JOEL D.; GRECO,NANCY M.. |
| Abstract Laboratory trials were performed to determine the impact of three Neotropical predatory coccinellids (Cycloneda sanguinea, Eriopis connexa and Coleomegilla quadrifasciata) and a minute pirate bug (Orius insidiosus) on Chaetosiphon fragaefolii, an important strawberry aphid pest. The predation on C. fragaefolii nymphs and adults, as well as the time to the first attack of all predators were compared with predation on Aphis gossypii. Predator preferences for prey and aphid defensive behavior were also evaluated. Moreover, the effect of coccinellids on C. fragaefolii population growth was assessed in experimental greenhouse conditions. The predation rate varied among predators, being significantly lower for O. insidiosus than for the coccinellids.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Behavior; Biological control; Chaetosiphon fragaefolii; Fragaria x ananassa; Predation rate; Coccinellids. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000700869 |
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| TRUOL,GRACIELA A.; USUGI,TOMIO; HIRAO,JUTARO; ARNEODO,JOEL D.; GIMÉNEZ PECCI,M. PAZ; LAGUNA,IRMA G.. |
| Entre las enfermedades que afectan al cultivo de maíz (Zea mays) en Argentina, la producida por el virus del mal de Río Cuarto (MRCV) es la más importante. El MRCV pertenece a la familia Reoviridae, género Fijivirus, y su propagación en la naturaleza es realizada por Delphacodes kuscheli (Hemiptera: Delphacidae). La modalidad de transmisión para los miembros de este género de virus es persistente propagativa. Se estableció la necesidad de ajustar un sistema de transmisión eficiente del virus para estudios de caracterización, partiendo de poblaciones libres de virus criadas en laboratorio, para lo cual se ensayaron distintos períodos de adquisición, latencia e inoculación, evaluándose además un rango de hospedantes diferenciales. Se lograron obtener... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Transmisión por vectores; Delphacidae; Fijivirus; Cereales. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582001000100007 |
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| ARNEODO,JOEL D.; LORENZO,EUGENIA; LAGUNA,IRMA G.; ABDALA,GUILLERMINA; TRUOL,GRACIELA A.. |
| The Mal de Río Cuarto disease is caused by Mal de Río Cuarto virus (MRCV) transmitted by Delphacodes kuscheli. Comparative studies were carried out on the cytopathological alterations produced by MRCV in corn (Zea mays), wheat (Triticum aestivum) and barley (Hordeum vulgare), as seen with a transmission electron microscope. Corn plants were infected with viruliferous D. kuscheli collected from the endemic disease area (i.e. Río Cuarto County, Córdoba, Argentina). For the viral transmission to small grain cereal plants, laboratory rared insects were used. In this case, the inoculum source was wheat and barley plants infected with MRCV isolate grown in a greenhouse. Leaf samples with conspicuous symptoms were collected: enations and size reduction in corn;... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Virus characterization; Electron microscopy; Fijivirus; Reoviridae; Cereals. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582002000300010 |
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