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Search Results: 1 - 10 of 219440 matches for " Virginia;Cruz-López "
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Aromas florales y su interacción con los insectos polinizadores
Grajales-Conesa, Julieta;Meléndez-Ramírez, Virginia;Cruz-López, Leopoldo;
Revista mexicana de biodiversidad , 2011,
Abstract: plants use visual and olfactory cues to attract pollinators and to allow them to detect the presence of flowers, which most of them are insects. some plants have evolved with their pollinators, based on the olfactory messages, which make them unique for their specific pollinators. these mechanisms have evolved in certain plants in relation to their pollinators, and there are also inter and intra-specific variation in fragrance cues which show specific chemical profile for each plant species, so insects attracted are specific to them. most of the floral scents are organic compounds identified with techniques and methodologies which become more specific and efficient along the time. the application of floral scent could be used as a tool in pollination and pest management. in these studies, insect interaction with floral scent is reviewed and specificity of plant-pollinator, additionally the method of analysis, some patterns and trends in these interactions, the application and its importance are examined.
Aromas florales y su interacción con los insectos polinizadores Floral scents and their interaction with insect pollinators
Julieta Grajales-Conesa,Virginia Meléndez-Ramírez,Leopoldo Cruz-López
Revista mexicana de biodiversidad , 2011,
Abstract: Las plantas emplean diversas se ales visuales y olfativas con la finalidad de atraer a los polinizadores que en su mayoría son insectos. Algunas plantas han desarrollado mecanismos, basándose en mensajes olfativos que los hacen únicos para sus polinizadores específicos. Estos mecanismos, así como las variaciones intra- e interespecíficas en el perfil de los aromas florales han evolucionado para determinadas especies. Los aromas florales son un conjunto de compuestos volátiles orgánicos y para su estudio hay varios métodos que requieren de técnicas que cada vez son más eficientes. El uso de estos aromas podría ser una opción en determinados sistemas de polinización, utilizándolos como atrayente de polinizadores o de depredadores y/o herbívoro para incrementar la producción y disminuir los da os por plagas. En este trabajo se revisan las distintas interacciones de los insectos y los aromas florales, los sistemas específicos planta-polinizador, los métodos de análisis, así como algunos patrones o tendencias de estas interacciones y su aplicación e importancia. Plants use visual and olfactory cues to attract pollinators and to allow them to detect the presence of flowers, which most of them are insects. Some plants have evolved with their pollinators, based on the olfactory messages, which make them unique for their specific pollinators. These mechanisms have evolved in certain plants in relation to their pollinators, and there are also inter and intra-specific variation in fragrance cues which show specific chemical profile for each plant species, so insects attracted are specific to them. Most of the floral scents are organic compounds identified with techniques and methodologies which become more specific and efficient along the time. The application of floral scent could be used as a tool in pollination and pest management. In these studies, insect interaction with floral scent is reviewed and specificity of plant-pollinator, additionally the method of analysis, some patterns and trends in these interactions, the application and its importance are examined.
Effect of Citrus floral extracts on the foraging behavior of the stingless bee Scaptotrigona pectoralis (Dalla Torre)
Grajales-Conesa, Julieta;Meléndez Ramírez, Virginia;Cruz-López, Leopoldo;Sánchez Guillén, Daniel;
Revista Brasileira de Entomologia , 2012, DOI: 10.1590/S0085-56262012000100012
Abstract: effect of citrus floral extracts on the foraging behavior of the stingless bee scaptotrigona pectoralis (dalla torre). stingless bees have an important role as pollinators of many wild and cultivated plant species in tropical regions. little is known, however, about the interaction between floral fragrances and the foraging behavior of meliponine species. thus we investigated the chemical composition of the extracts of citric (lemon and orange) flowers and their effects on the foraging behavior of the stingless bee scaptotrigona pectoralis. we found that each type of flower has its own specific blend of major compounds: limonene (62.9%) for lemon flowers, and farnesol (26.5%), (e)-nerolidol (20.8%), and linalool (12.7%) for orange flowers. in the foraging experiments the s. pectoralis workers were able to use the flower extracts to orient to the food source, overlooking plates baited with hexane only. however, orange flower extracts were seemingly more attractive to these worker bees, maybe because of the particular blend present in it. our results reveal that these fragrances are very attractive to s. pectoralis, so we can infer that within citric orchards they could be important visitors in the study area; however habitat destruction, overuse of pesticides and the competitive override by managed honeybees might have put at risk their populations and thus the ecological services they provide to us.
Poincaré theory for compact abelian one-dimensional solenoidal groups
Manuel Cruz-López,Alberto Verjovsky
Mathematics , 2013,
Abstract: The notion of Poincar\'e rotation number for homeomorphisms of the unit circle is generalized to the case of homeomorphisms of a general compact abelian one--dimensional solenoidal group, which is also a one--dimensional foliated space; specifically, the theory is developed for the algebraic universal covering space of the circle. Poincar\'e's dynamical classification theorem is also generalized to homeomorphisms of solenoids whose rotation element is an irrational element (i.e., monothetic generator) of the given group.
Electroantennography in the study of two stingless bee species (Hymenoptera: meliponini)
Patricio, E. F. L. R. A.;Cruz-López, L.;Morgan, E. D.;
Brazilian Journal of Biology , 2004, DOI: 10.1590/S1519-69842004000500012
Abstract: the first recorded electroantennographic preliminary studies on stingless bees have been performed using two species of frieseomelitta from brazil. experiments with f. silvestrii and f. varia showed that antennae respond to hexane extracts of heads and abdomens of both species and posterior tibia of f. silvestrii (which carry plant resin), as well as to the pure compounds 2-heptanol and 2-nonanol, which occur in the mandibular glands of both species, and to the terpenes a-cubebene, humulene, and b-caryophyllene found on their tibia and in the cerumen of their nests.
Evaluación de trampas de colores para trips del mango Ataulfo en el Soconusco, Chiapas
Virgen Sánchez, Armando;Santiesteban Hernández, Antonio;Cruz-López, Leopoldo;
Revista mexicana de ciencias agrícolas , 2011,
Abstract: in this paper colored traps were evaluated to capture thrips in mango cv. ataulfo trees in soconusco, chiapas, mexico. sticky traps were compared in different colors: blue, yellow and violet. it was placed a trap of each color per tree and they were evaluated in five trees. the results showed that significantly more thrips were caught in violet traps.
Evaluación de trampas de colores para trips del mango Ataulfo en el Soconusco, Chiapas Evaluation of color traps for the mango Ataulfo thrips in the Soconusco, Chiapas
Armando Virgen Sánchez,Antonio Santiesteban Hernández,Leopoldo Cruz-López
Revista mexicana de ciencias agrícolas , 2011,
Abstract: En este trabajo se evaluaron trampas de colores para capturar trips en árboles de mango cv. Ataulfo en el Soconusco, Chiapas, México. Se compararon trampas pegajosas de color azul, amarillo y violeta. Se colocó una trampa de cada color por árbol y se evaluaron en 5 árboles. Los resultados mostraron que se capturaron significativamente más trips en las trampas de color violeta. In this paper colored traps were evaluated to capture thrips in mango cv. Ataulfo trees in Soconusco, Chiapas, Mexico. Sticky traps were compared in different colors: blue, yellow and violet. It was placed a trap of each color per tree and they were evaluated in five trees. The results showed that significantly more thrips were caught in violet traps.
Miasis de nasofaringe, completando ciclo biológico in vitro
Cruz-López, Othón;Tamariz-Cruz, Orlando José;Mu?oz-López, Arturo;Cruz-López, María Cristina;Mu?oz-López, Sandra;
Boletín médico del Hospital Infantil de México , 2005,
Abstract: introduction. myasis is the parasitism of organs and tissues of warm-blooded vertebrates by the larvae of flies of different species. case report. thirteen year old female. her house is provided with running water and sewer she had contact with farm house poultry. she began presenting symptoms 5 days prior to admission she presented with nasal discharge and pharyngitis. her temperature was 38° c. at emergency services the patient was diagnosed with bacterial pharyngytis. penicillin and clorfeniramine were administered. three days later, larvae started coming out of her nose and mouth. in total 10 larvae were documented. in emergency services at a hospital, physical examination revealed pharyngeal erythema and rinorrhea. the larvae were described as yellowish, 10 mm long and 3 mm wide. the worms were sent to the department of parasitology of the school of medicine of puebla, mexico, where they completed the in vitro cycle and were identified as dermatobia hominis (fly), belonging to the enterebridae family. in the hospital, 85 larvae were extracted from the patient. she discharged after 10 days of asymptomatic hospitalization. conclusion. myasis is not frequent and it can cause great tissue destruction. antibiotic administration is generally not warranted unless there is evidence of concomitant superinfection.
Presencia de Orius insidiosus (Say) (Hemiptera: Anthocoridae) en inflorescencias de mango ataulfo en el Soconusco, Chiapas, México
A. Santiesteban-Hernández,A. Virgen-Sánchez,Y. Henaut,L. Cruz-López
Acta zoológica mexicana , 2011,
Abstract: The pirate bug Orius insidiosus (Say) was found for the first time in the inflorescences of mango cultivar Ataulfo in Soconusco, Chiapas, Mexico.
Presencia de Orius insidiosus (Say) (Hemiptera: Anthocoridae) en inflorescencias de mango ataulfo en el Soconusco, Chiapas, México
SANTIESTEBAN-HERNáNDEZ, Antonio;VIRGEN-SáNCHEZ, Armando;HENAUT, Yann;CRUZ-LóPEZ, Leopoldo;
Acta zoológica mexicana , 2011,
Abstract: the pirate bug orius insidiosus (say) was found for the first time in the inflorescences of mango cultivar ataúlfo in soconusco, chiapas, mexico.
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