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Registros recuperados: 10
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Effect of the larval density of Chrysodeixis includens (LEPIDOPTERA, NOCTUIDAE) on cotton yield. Repositório Alice
RODRIGUES, S. M. M.; PITTA, R. M.; SANTOS, N. C..
The cultivation of soybean near to cotton areas has favored the migration of lepidopteran pests between those crops, including the soybean looper, Chrysodeixis includens, which usually attacks soybean leaves but can also attack cotton plants. The objective of this study is to identify the density of C. includens larvae capable of decreasing cotton productivity. Six treatments (0, 2, 4, 6, 8 and 16 larvae.meter-1) with five replications were arranged in a completely randomized block design. Plants of cultivar FM 944GL at stage F2 were protected by PVC cages (length, 1.0 m; width, 1.0 m, height, 1.6 m) covered with organza fabric and infested with third-instar larvae. Crop yield and defoliation data were subjected to analysis of variance using the F-test and...
Tipo: Artigo de periódico Palavras-chave: Herbivory; Management; Falsa-medideira; Herbivoria; Soybean looper; Gossypium Hirsutum; Manejo; Herbivores; Pseudoplusia includens virus.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1118778
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Evolutionary diversity in tropical tree communities peaks at intermediate precipitation. Repositório Alice
NEVES, D. M.; DEXTER, K. G.; BAKER, T. R.; SOUZA, F. C. de; OLIVEIRA-FILHO, A. T.; QUEIROZ, L. P.; LIMA, H. C.; SIMON, M. F.; LEWIS, G. P.; SEGOVIA, R. A.; ARROYO, L.; REYNEL, C.; MARCELO-PEÑA, J. L.; HUAMANTUPA-CHUQUIMACO, I.; VILLARROEL, D.; PARADA, G. A.; DAZA, A.; LINARES-PALOMINO, R.; FERREIRA, L. V.; SALOMÃO, R. P.; SIQUEIRA, G. S.; NASCIMENTO, M. T.; FRAGA, C. N.; PENNINGTON, R. T..
Tipo: Artigo de periódico Palavras-chave: Precipitation; Protected Areas; Conservation; Rainfall; Species Richness; Herbivores; Evolution; Deforestation; Phylogeny.
Ano: 2020 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1125199
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Invertebrate herbivory on floating-leaf macrophytes at the northeast of Argentina: should the damage be taken into account in estimations of plant biomass? Anais da ABC (AABC)
MARTÍNEZ,FEDRA S.; FRANCESCHINI,CELESTE.
ABSTRACT: We assessed the damage produced by invertebrate herbivores per leaf lamina and per m2 of populations floating-leaf macrophytes of Neotropical wetlands in the growth and decay periods, and assessed if the damage produced by the herbivores should be taken into account in the estimations of plant biomass of these macrophytes or not. The biomass removed per lamina and per m2 was higher during the growth period than in decay period in Nymphoides indica and Hydrocleys nymphoides, while Nymphaea prolifera had low values of herbivory in growth period. During decay period this plant is only present as vegetative propagules. According to the values of biomass removed per m2 of N. indica, underestimation up to 17.69% should be produced in cases that...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Plant damage; Herbivores; Nymphoides; Nymphaea..
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000100155
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Making a better home: modulation of plant defensive response by brevipalpus mites. Repositório Alice
ARENA, G. D.; RAMOS-GONZÁLEZ, P. L.; ROGERIO, L. A.; RIBEIRO-ALVES, M.; CASTEEL, C. L.; ASTUA, J. de F.; MACHADO, M. A..
False-spider mites of the genus Brevipalpus are highly polyphagous pests that attack hundreds of plant species of distinct families worldwide. Besides causing direct damage, these mites may also act as vectors of many plant viruses that threaten high-value ornamental plants like orchids and economically important crops such as citrus and coffee. To better understand the molecular mechanisms behind plant-mite interaction we used an RNA-Seq approach to assess the global response of Arabidopsis thaliana (Arabidopsis) plants along the course of the infestation with Brevipalpus yothersi, the main vector species within the genus. Mite infestation triggered a drastic transcriptome reprogramming soon at the beginning of the interaction and throughout the time...
Tipo: Separatas Palavras-chave: Herbivores; Plant hormones; Salicylic acid; Jasmonic acid.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1095414
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Mammalian Herbivores in the Boreal Forests: Their Numerical Fluctuations and Use by Man Ecology and Society
Danell, Kjell; Swedish University of Agricultural Sciences; kjell.danell@szooek.slu.se; Willebrand, Tomas; Swedish University of Agricultural Sciences; tomas.willebrand@szooek.slu.se; Baskin, Leonid; Institute of Ecology and Evolution, Russian Academy of Sciences; leonidBaskin@glasnet.ru.
Within the boreal zone, there are about 50 native mammalian herbivore species that belong to the orders Artiodactyla, Rodentia, and Lagomorpha. Of these species, 31 occur in the Nearctic and 24 in the Palaearctic. Only six species occur in both regions. Species of the family Cervidae have probably been, and still are, the most important group for man, as they provide both meat and hides. Pelts from squirrels, muskrats, and hares were commercially harvested at the beginning of the century, but have less value today. The semi-domestic reindeer in the Palaearctic produces meat and hides on a commercial basis. It is also used for milking, to a limited extent, as is the semi-domestic moose in Russia. The Siberian musk deer is used for its musk and is raised in...
Tipo: Peer-Reviewed Reports Palavras-chave: Boreal forests; Conservation; Fluctuations; Herbivores; Human use; Mammals; Management; Populations; Variability..
Ano: 1998
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Occurrence and structure of extrafloral nectariesin Pterodon pubescens Benth. and Pterodon polygalaeflorus Benth. PAB
Paiva,Élder Antônio Sousa e; Morais,Helena Castanheira de; Isaias,Rosy Mary dos Santos; Rocha,Dulce Maria Sucena da; Oliveira,Paulo Eugênio.
Extrafloral nectaries (EFNs) are structurally variable and widely spread among the angiosperms. The occurrence of EFNs in leaves of Pterodon polygalaeflorus Benth. and Pterodon pubescens Benth. (Fabaceae: Papilionoideae) were detected in adult specimens, at the time of production of new buds and flowers. The goals of the present study are to register the occurrence of the EFNs in P. pubescens and P. polygalaeflorus, and provide comparative data on the anatomical structures. The EFNs occur in the rachis and are located under the insertion of each petiolule. Each nectary consists of a small elevation whose apical portion is deeply invaginated, resulting in a depression (secretory pole), a common characteristic of both species. Unicellular, nonglandular...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Nectaries; Plant anatomy; Plant secretions; Nectar; Plant protection; Herbivores; Plant animal relations.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2001000200002
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Plant reproductive phenology and dispersal patterns after natural regeneration in a limestone mining spoil banks BABT
Frenedozo,Rita de Cássia.
Studies were carried out on the phenological patterns and dispersion of a plant community developed naturally after limestone mining operations, in accumulated materials of wastes (spoil banks). The objectives were to focus the seasonality of plant reproductive in a degraded environment; to analyze the community according to dispersal syndrome and to know about plant resources for the animals Monthly observations of flowering and fruiting patterns of the community were done, comparing the herbaceous, shrubs and woody species. Proportion of anemochorous and autochorous was higher in the herbaceous and shrubby strata. The zoochorous ones, on the contrary, were more frequent in the woody stratum. This study showed that natural introduction of the animals at...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Phenology; Mining; Brazil; Plant dispersal; Herbivores; Community.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000200014
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Senescent stem-galls in trees of Eremanthus erythropappus as a resource for arboreal ants Rev. Bras. entomol.
Almeida,Maria Fernanda B. de; Santos,Leonardo Rodrigues dos; Carneiro,Marco Antonio A..
Senescent stem-galls in trees of Eremanthus erythropappus as a resource for arboreal ants. Members of the dipteran families Tephritidae and Cecidomyiidae are inducers of stem-galls in Eremanthus erythropappus (DC.) MacLeish (Asteraceae), a tree common in the state of Minas Gerais, Brazil. When senescent, these galls become available to other organisms, such as ants. The present study describes a community of ants having benefitted from this process of ecosystem-engineering. The colonies in question inhabit the senescent stem-galls of trees of E. erythropappus and were examined in view of answering the following questions: i) whether the presence of stem-galls had any bearing on the richness, composition, or size of the ant colonies therein; and ii) whether...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Herbivores; Insecta; Interaction; Nesting.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262014000300007
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The functional roles of herbivores in the rocky intertidal systems in Chile: A review of food preferences and consumptive effects RChHN
AGUILERA,MOISÉS A.
This paper reviews recent knowledge about the functional roles that herbivores have in intertidal communities in Chile. Specifically, I review field and laboratory studies dealing with the food preferences of herbivores, the responses of algae to herbivore attacks and reports of negative and positive functional effects of herbivores on algal populations and communities. Most herbivores studied are characterized as generalist species. Green ephemeral and a few corticated algae dominate diets, while all species considered ingest larvae and post-metamorphic stages of invertebrates challenging classical characterizations of the herbivore guild. Functional redundancy and complementarity within the herbivore guild is discussed in relation to both quantitative...
Tipo: Journal article Palavras-chave: Chile; Herbivores; Functional role; Guild; Intertidal.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2011000200009
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The partitioning of food resources between two rodents in the subtropical region of southern Brazil Anais da ABC (AABC)
ESPINELLI,FÁBIO P.; CORRÊA,FABIANO; COLARES,ELTON P.; COLARES,IONI G..
ABSTRACT The capybara (Hydrochoerus hydrochaeris) and nutria (Myocastor coypus) are herbivorous semi-aquatic rodents. Although these rodents occur in sympatry in southern South America, little is known about how the two species interact in relationship to food resources. In this context, the aim of this study was to analyze the food resource overlap, the feeding strategy and the diversity of the diet of capybaras and nutria. A micro-histological analysis of feces was used to study the diets. A total of 48 plant species belonging to 10 families were identified in the diet of H. hydrochaeris, and a total of 49 species belonging to 14 families were identified in the diet of M. coypus. According to the Amundsen graphical method, both rodents adopted a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Diet overlap; Feeding strategy; Herbivores; Micro-histological analysis..
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000100191
Registros recuperados: 10
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