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Registros recuperados: 5
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Effect of volcanic ash over Orthoptera survival in Patagonia Ecología austral
Fernández-Arhex,Valeria; Amadio,María E.; Enriquez,Andrea; Pietrantuono,Ana; Becker,Guillermo; Bruzzone,Octavio.
The aim of this work was to evaluate the ash toxicity from the Puyehue-Cordón Caulle volcanic complex on the survival of two Orthopteran species: the grasshoper Dichroplus vittigerum and the green locust Brugilis sp. Two grain size were used to evaluate the effect of volcanic eruption on these insects. Chemical analyses from this eruption proved that the ashes were very abrasive and predominantly composed of silica shards (SiO2) and aluminia (Al2O3), two substances with insecticidal properties. In northern Patagonia, both orthopteran species are polyphagous chewers on grasses and dicots. The laboratory data showed that sustained exposure to volcanic ash induced mortality in adult grasshoppers. Survival of D. vittigerum significantly decreased once exposed...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Grasshoppers; Inert dust; Locusts; Patagonia; Survival.
Ano: 2015 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2015000100010
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First record of the subfamily Proctolabinae (Orthoptera: Acridoidea: Acrididae) from Argentina Rev. Soc. Entomol. Argent.
Bardi,Christian; Pocco,Martina E.; Cigliano,María Marta.
This contribution records for the first time the subfamily Proctolabinae from Argentina. This subfamily contains 29 genera and 209 species restricted to the Neotropics with only one genus, Eucephalacris Descamps, reaching south as far as Mato Grosso in Brazil and northern Paraguay. Specimens belonging to Eucephalacris borellii (Giglio-Tos) were collected in Misiones province. The presence of this species registered herein raises to eleven the number of Acrididae subfamilies known to occur in the country, and highlights the importance of conducting surveys of Acridoidea and Orthoptera in general, in diverse regions of Argentina. Brief diagnoses and illustrations of the characters that allowed the identification of the genus and species are also given in...
Tipo: Info:eu-repo/semantics/report Palavras-chave: Proctolabinae; Eucephalacris borellii; Biodiversity; Grasshoppers.
Ano: 2010 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0373-56802010000200013
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Grasshopper Population Ecology: Catastrophe, Criticality, and Critique Ecology and Society
Lockwood, Dale R; Colorado State University; dale.lockwood@colostate.edu; Lockwood, Jeffrey A; University of Wyoming;.
Grasshopper population dynamics are an important part of the North American rangeland ecosystem and an important factor in the economies that derive from the rangeland. Outbreak dynamics have plagued management strategies in the rangeland, and attempts to find simple, linear and mechanistic solutions to both understanding and predicting the dynamics have proved fruitless. These efforts to ground theory in a correspondence with the “real” world, including whether the population dynamics are ultimately density dependent or density independent, have generated abundant heat but little light. We suggest that a pragmatic approach, in which theories are taken to be “tools” rather than competing claims of truth, has greater...
Tipo: Peer-Reviewed Reports Palavras-chave: Catastrophe theory; Complexity science; Grasshoppers; Models; Pest management; Population dynamics; Rangeland ecosystem; Self-organized criticality.
Ano: 2008
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Notes monographiques preliminares sur Eutropidacris collaris (Stoll, 1813) (Orthoptera, Romaleidae, Romaleinae) au Bresil. Infoteca-e
LAUNOIS, M. A..
Identite taxonomique; Distribution geographique et importance economique; Caracteres bio-ecologiques; Perspectives de controle des pullulations; Conclusion: Les recherches a entreprendre.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E) Palavras-chave: Controle; Eutropidacris collaris (Stoll; 1813) (Orthoptera; Romaleidae; Romaleinae) au Bresil; Memória técnica do CPATSA; Grasshopper; Gafanhoto; Taxonomia; Grasshoppers.
Ano: 1984 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/157779
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Sporulation of Metarhizium anisopliae var. Acridum and Beauveria bassiana on Rhammatocerus schistocercoides under humid and dry conditions BJM
Magalhães,Bonifácio Peixoto; Goettel,Mark Stanislaw; Frazão,Heloisa da Silva.
The sporulation of the fungi Metarhizium anisopliae var. acridum and Beauveria bassiana in cadavers of the grasshopper Rhammatocerus schistocercoides was studied in dry and humid environments. Both fungi were equally virulent against R. schistocercoides. However, internally, M. anisopliae produced more conidia than B. bassiana at 53% and 75% relative humidity. Externally, there was no sporulation at 53% and 75% RH, and M. anisopliae produced more conidia than B. bassiana at 100% RH.
Tipo: Info:eu-repo/semantics/other Palavras-chave: Entomopathogenic fungi; Internal sporulation; Grasshoppers; Microbial control.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822000000300002
Registros recuperados: 5
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