Consulta: creatorFacets:"FONTES,ELIANA M.G."
Registros recuperados: 2
Data/hora: 11/06/2024 09:15:10

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

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