Grasshoppers
Mostrando 1-12 de 28 artigos, teses e dissertações.
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1. Metabolization of Insecticidal Amides from Leaves of Piper tuberculatum by Heraclydes hectorides and Naupactus bipes
Amides have been recognized as potent insecticidal natural products but, despite their variety of targets and mechanisms of action, their metabolic fate in insects is virtually unknown. The currently accepted hypothesis is that specialist herbivores are capable of biotransforming xenobiotics rendering them more polar and excretable while generalist insects d
J. Braz. Chem. Soc.. Publicado em: 2020-04
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2. Chromosome mapping of ribosomal genes and histone H4 in the genus Radacridium (Romaleidae)
In this study, two species of Romaleidae grasshoppers, Radacridium mariajoseae and R.nordestinum, were analyzed after CMA3/DA/DAPI sequential staining and fluorescence in situ hybridization (FISH) to determine the location of the 18S and 5S rDNA and histone H4 genes. Both species presented karyotypes composed of 2n = 23, X0 with exclusively acrocentric chrom
Genet. Mol. Biol.. Publicado em: 19/07/2013
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3. Orthoptera assemblages associated with macrophytes of floodplain lakes of the Paraná River
Orthoptera assemblages associated with macrophytes of floodplain lakes of the Paraná River. The Orthoptera assemblage composition varies considerably, depending on habitat type. This study examines the spatiotemporal relationship between plant diversity, hydrometric level, environmental variables and the Orthoptera richness and abundance in floodplain lakes
Rev. Bras. entomol.. Publicado em: 2013-03
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4. Characterization of a Peruvian isolate of Metarhizium anisopliae var. acridum, a pathogen of grasshoppers.
The objective of this study was to characterize the Peruvian isolate of Metarhizium anisopliae var. acridum, CG 863, obtained from the grasshopper Schistocerca interrita, a crop pest in Peru. The characterization was done by comparing this isolate with two other ones of M. anisopliae var. acridum, from Brazil and Australia, and with an isolate of M. anisopli
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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5. A test of Allen's rule in ectotherms: the case of two south American Melanopline Grasshoppers (Orthoptera: Acrididae) with partially overlapping geographic ranges
We studied the geographic variation of three morphometric characters in relation to body size in two South American grasshoppers (Acrididae), Dichroplus vittatus Bruner and D. pratensis Bruner to test Allen's rule in these ectotherms. Since both species follow the converse to Bergmann's rule owing to latitudinal and/or altitudinal variation in time available
Neotropical Entomology. Publicado em: 2008-08
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6. Estudo de proteases degradadoras de cutícula produzidas por Beauveria bassiana
The entomopathogenic fungus Beauveria bassiana is considered a promising agent of microbial control of insects considered pests of agriculture, such as, the grasshopper Rhammatocerus schistocercoides. This grasshopper attacks economically important plantations in the center-west Brazil. B. bassiana is capable to penetrate through cuticle of the host by apres
Publicado em: 2007
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7. Histomorphometric evaluation of the female reproductive system of Tropidacaris collaris (Stoll,1813) (Orthoptera: Romaleidae) submitted to three photoperiods / Avaliação histomorfométrica do aparelho reprodutor feminino de Tropidacris collaris (Stoll,1813) (Orthoptera : Romaleidae) submetido a três fotoperíodos
In Brazil, the presence and the increase of the population of grasshoppers are linked, certainly, to the deforestation and to the new types of manipulation of agroforestry cultures, implanted in the cerrado and other regions. Among the species of grasshoppers of economic importance, the Tropidacris collaris (Stoll, 1813) (Orthoptera: Romaleidae) is highlight
Publicado em: 2006
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8. AnÃlise citogenÃtica comparativa em gafanhotos das famÃlias acrididae e romaleidae atravÃs de tÃcnicas convencionais e moleculares
A comparative cytogenetic analysis was performed between the romaleid species Chromacris nuptialis and C. speciosa in order to detect possible chromosomic markers through C banding, silver nitrate staining, base-especific fluorochromes (CMA3 and DAPI) and FISH using a 45S rDNA probe. Both species have the same karyotype number, 2n=23,X0 and acrocentric chrom
Publicado em: 2005
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9. Plantas hospedeiras de cornops aquaticum (Bruner) (Orthoptera : Acrididae) no Pantanal de Pocone-MT
The grasshopper Cornops aquaticum lives permanently on aquatic macrophytes in floodplains of tropical South America. Its host plants and its feeding preference were determined by means of field observations, crop analysis and feedings tests in the laboratory. Macrophytes were sampled and their petiols were examined for potential egg deposition in order to re
Publicado em: 1995
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10. Learning improves growth rate in grasshoppers
To quantify the adaptive significance of insect learning, we documented the behavior and growth rate of grasshoppers (Schistocerca americana) in an environment containing two artificial food types, one providing a balanced diet of protein and carbohydrate, which maximizes growth, and the other being carbohydrate-deficient, which is unsuitable for growth
The National Academy of Sciences.
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11. Insect herbivory accelerates nutrient cycling and increases plant production
Ecologists hold two views about the role of herbivory in ecosystem dynamics. First, from a food web perspective in population/community ecology, consumption by herbivores reduces plant abundance. Second, from a nutrient cycling perspective in ecosystem ecology, herbivory sometimes slows down cycling, which decreases plant abundance, but at other times s
The National Academy of Sciences.
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12. Pairing Competition between Identical and Homologous Chromosomes in Rye and Grasshoppers
Meiotic pairing preferences between identical and homologous but not identical chromosomes were analyzed in spontaneous tetraploid/diploid chimeras of three male grasshoppers (Eyprepocnemis plorans) whose chromosome pair 11 were heterozygous for C-banding pattern and in four induced tetraploid/diploid chimaeral rye plants (Secale cereale) heterozygous for te