Consulta: creatorFacets:"SUJII,EDISON R."
Registros recuperados: 4
Data/hora: 10/06/2024 07:37:02

Predation as a Mortality Factor in Populations of the Spittlebug, Deois flavopicta Stål (Homoptera: Cercopidae)
Provedor de dados: 82
Autores: SUJII,EDISON R.; GARCIA,MARIA A.; FONTES,ELIANA M.G.; O'NEIL,ROBERT J.
The spittlebug, Deois flavopicta Stål, is the main pest in cultivated pastures of the "Cerrados" (savanna) in the central region of Brazil. The insect has three discrete generations during the rainy season (September-April) and a synchronized population of diapausing eggs during the dry season (May-August). Experiments in cultivated pastures showed that nonspecific predators were able to affect significantly the mortality rates of diapausing eggs and nymphs of D. flavopicta. Predation was a density independent mortality factor that reduced diapausing eggs by approximately 60% and nymphs by 20% to 47%. The nymph mortality rate due to predation did not differ during the first and the second generations of the year. For the third generation however, the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Insecta; Insect community; Population dynamics; Survival curve.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2002000400010

Cinética da esporulação e viabilidade de conídios de Nomuraea rileyi (Farlow) samson sobre cadáveres da lagarta-da-soja, Anticarsia gemmatalis Hübner (Lepidoptera: Noctuidae), em condições de campo
Provedor de dados: 82
Autores: SUJII,EDISON R.; CARVALHO,VANESSA A.; TIGANO,MYRIAN S.
O fungo entomopatogênico Nomuraea rileyi (Farlow) Samson pode produzir epizootias em populações de lagarta-da-soja, Anticarsia gemmatalis Hübner, controlando essa praga naturalmente. No entanto, o fenômeno nem sempre ocorre a tempo de evitar que populações de A. gemmatalis atinjam o nível de dano econômico na cultura. Observações sobre a produção de conídios em cadáveres de A. gemmatalis em condições de campo mostraram que alta umidade relativa e precipitação são fatores determinantes na cinética da esporulação do fungo in vivo. O início da esporulação foi retardado e a produção de conídios diminuída quando cadáveres de A. gemmatalis infectados com N. rileyi foram submetidos a períodos longos de estresse hídrico (umidade relativa de 25-30%). Observações no...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Insecta; Fungo entomopatogênico; Controle biológico; Epizootia; Praga da soja.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2002000100012

The Environmental Effects of Genetically Modified Crops Resistant to Insects
Provedor de dados: 82
Autores: FONTES,ELIANA M.G.; PIRES,CARMEN S.S.; SUJII,EDISON R.; PANIZZI,ANTÔNIO R.
Transgenic crops are currently being cultivated on a commercial scale in many countries. The area devoted to transgenic pest resistant varieties worldwide reached 13 million hectares in 2001. These varieties offer valuable benefits but also pose potential risks. Assessments of their impact on the environment are conducted before they are approved for commercial use, as required by the regulatory biosafety frameworks. In this review, we discuss the potential ecological consequences of the commercial use in agriculture of genetically modified insect resistant crops. We also discuss the impacts caused by the change in agricultural practices, and attempt to identify gaps and possible opportunities for research, considering this new technological tool. We based...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Transgenic crop; Bt gene; Non-target organism; Gene flow; Biosafety.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2002000400001

Artificial tritrophic exposure system for environmental risk analysis on aphidophagous predators
Provedor de dados: 42
Autores: PAULA,DÉBORA P.; SOUZA,LUCAS M. DE; ANDOW,DAVID A.; SOUSA,ALEX A.T. CORTÊS DE; PIRES,CARMEN S.S.; SUJII,EDISON R.
ABSTRACT We evaluated an artificial tritrophic exposure system for use in ecotoxicological evaluations of environmental stressors on aphidophagous predators. It consists of an acrylic tube with a Parafilm M sachet containing liquid aphid diet, into which can be added environmental stressors. Immature Cycloneda sanguinea, Harmonia axyridis and Chrysoperla externa, and adult H. axyridis were reared on Myzus persicae. Larval and pupal development and survival of all species and reproductive parameters of H. axyridis were similar to published results. The system provides a suitable tritrophic exposure route, enables ex-ante evaluation of stressors, and improves the accuracy of the assessment.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beneficial insects; Biosafety; Ecotoxicology; Exposure routes.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000401569