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27 resultados encontrados para: AUTOR: Santiesteban Hernández, Antonio
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1.
- Artículo con arbitraje
Resumen en: Inglés |
Resumen en inglés

In this study, we investigated the influence of cultivar type, fruit ripeness, and damage by conspecific larvae on the attraction of Anastrepha obliqua (Macquart) (Diptera: Tephritidae) to and oviposition on carambola fruit (Averroha carambola L.). The attraction of both sexes of A. obliqua to fruit of different quality was evaluated through cage experiments in the field, and the oviposition preferences of mated females were examined in laboratory tests. Both sexes, mated or virgin, were more attracted to the "Maha" fruit than to the "Golden Star" fruit, and the females oviposited more frequently on the Maha cultivar than the Golden Star cultivar. Both sexes were more attracted to ripe and half-ripe Maha fruits than to mature green fruit, and although females did not show a preference for ovipositing on half-ripe or ripe fruits, they did not oviposit on mature green fruits. Males did not show a preference for the volatiles from uninfested, artificially damaged, or infested Maha fruits, but females were more attracted to uninfested fruits than to artificially damaged and infested Maha fruits. Furthermore, females preferred to oviposit on uninfested fruits compared with artificially damaged fruit, and they did not oviposit on infested fruits.


2.
- Artículo con arbitraje
PDF
Resumen en: Español | Inglés |
Resumen en español

En este estudio se investigó la presencia de tres anti-inflamatorios no esteroideos (AINEs: naproxeno [NPX], ketoprofeno [KFN] y el ibupofreno [IBF], en cuerpos de agua superficial receptores de aguas residuales no tratadas de la ciudad de Tapachula (sur de México). Las muestras fueron tomadas durante tres campañas de muestreo en dos ríos (Coatán y Texcuyupan), una corriente urbana (Coatancito) y en una laguna costera (Barra San Simón). Las muestras se analizaron por cromatografía de gases-espectrometría de masas. Los resultados mostraron altas concentraciones de NPX (17.83 a 142.50 μg L-1), KFN (5.30 a 67.87 μg L-1) y IBF (3.97 a 31.30 μg L-1), presente en la mayoría de las muestras. El análisis de correlación entre los compuestos de interés y los parámetros fisicoquímicos muestran que las descargas de aguas residuales son las principales fuentes de estos contaminantes. Por otra parte, los índices de riesgo estimados sugieren una posible amenaza para los organismos acuáticos (algas, microcrustáceos y peces) debido a las altas concentraciones del NPX e IBF en aguas superficiales.

Resumen en inglés

This study investigated the presence of three non-steroidal anti-inflammatory drugs (NSAIDs: naproxen [NPX], ketoprofen [KFN] and ibuprofen [IBF]), in surface water bodies receiving mostly untreated sewage from the city of Tapachula (South Mexico). Samples were taken during three sampling campaigns from two rivers (Coatán and Texcuyuapan), one urban stream (Coatancito), and one coastal lagoon (Barra San Simón), and the samples were analyzed by gas chromatography-mass spectrometry. Results showed high concentrations of NPX (17.83-142.50 μg L-1), KFN (5.30-67.87 μg L-1) and IBF (3.97-31.30 μg L-1), present in most samples. Correlation analysis between target compounds and physicochemical parameters supported the view that sewage discharge is the main source of these pollutants. Furthermore, estimated hazard indexes suggested a potential threat to aquatic organisms (algae, daphnids and fish) due to high concentrations of NPX and IBF in surface water.


3.
- Artículo con arbitraje
Host kairomones elicit area-restricted search by prorops nasuta, a parasitoid of the coffee berry borer
Chiu Alvarado, María del Pilar ; Santiesteban Hernández, Antonio (coaut.) ; Rojas, Julio C. (coaut.) ;
Contenido en: Open Entomology Journal Vol. 6 (2012), p. 17-21 ISSN: 1874-4079
PDF
Resumen en: Inglés |
Resumen en inglés

The bethylid wasp Prorops nasuta Waterston is a natural enemy of the coffee berry borer, Hypothenemus ham- pei Ferrari, the most devastating insect pest of coffee worldwide. Volatiles from H. hampei immature stages and dust/frass are used by P. nasuta as long-range cues during the host location process. In addition, host dust/frass extracts influenced the area-restricted search by P. nasuta females. In this study, we evaluated the effect of organic solvent extracts from H. hampei immature stages and adults on several parameters regarding locomotory behavior of P. nasuta females. P. nasuta females spent more time, covered greater distance, reduced their speed, and turned more per unit time in patches treated with hexanic, acetonic, and methanolic extracts from H. hampei immature stages and adults with respect to the solvent controls. The concentration of the methanolic extract from H. hampei immature stages clearly influenced the locomotory activity of P. nasuta.


4.
- Artículo con arbitraje
Evaluación de trampas de colores para Trips del mango ataulfo en El Soconusco, Chiapas
Virgen Sánchez, Armando (autor) ; Santiesteban Hernández, Antonio (autor) ; Cruz López, Leopoldo Caridad (autor) ;
Disponible en línea
Contenido en: Revista Mexicana de Ciencias Agrícolas Vol. 2, no. 4 (julio-agosto, 2011), p. 579-581 ISSN: 2007-0934
PDF PDF
Resumen en: Español | Inglés |
Resumen en español

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.

Resumen en inglés

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.


5.
Artículo
*En hemeroteca, SIBE-San Cristóbal
Presencia de orius ensidiosus (Say) (Hemiptera: anthocoridae) en inflorescencias de mango Ataulfo en el Soconusco, Chiapas, México
Santiesteban Hernández, Antonio ; Virgen Sánchez, Armando (coaut.) ; Hénaut, Yann (coaut.) ; Cruz López, Leopoldo Caridad (coaut.) ;
Contenido en: Acta Zoológica Mexicana (Nueva Serie) Vol. 27, no. 2 (agosto 2011), p. 497-499 ISSN: 0065-1737
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
51085-10 (Disponible)
Disponibles para prestamo: 1
Nota: En hemeroteca, SIBE-San Cristóbal
PDF
Resumen en: Inglés |
Resumen en inglés

The pirate bug Orius insidiosus (Say) was found for the first time in the inflorescences of mango cultivar Ataulfo in Soconusco, Chiapas, Mexico.


6.
Artículo
Comparative ecological risks of pesticides used in plantation production of papaya: application of the SYNOPS indicator
Hernández Hernández, Carlos Noé Alejandro ; Valle Mora, Javier Francisco (coaut.) ; Santiesteban Hernández, Antonio (coaut.) ; Bello Mendoza, Ricardo (coaut.) ;
Contenido en: Science of The Total Environment Vol. 381, no. 1-3 (August 2007), p. 112-125 ISSN: 0048-9697
Resumen en: Inglés |
Resumen en inglés

Pesticides are used intensively for crop protection in tropical fruit plantations. Assessments of the relative risks posed by pesticides are needed to assist in the development of management plans that minimize ecological impacts. In this study, the risk indicator SYNOPS_2 was used to compare risks to aquatic ecosystems by pesticides commonly used in papaya plantations. Plant interception and spray drift were measured during six applications of three pesticides (chlorothalonil, chloropyrifos, and malathion) using a turbo fan driven sprayer. Plant interception was estimated to be higher (42.6 ± 12.7%; p = 0.04) in late (8–14 months old) than in early (4 months old) trees (20.1 ± 25.3%). Chlorothalonil concentrations of up to 11.0 μg L− 1 were found in water from an adjacent ditch after field application. Concentrations of this pesticide (7.4 ± 4.1 μg L− 1) in runoff water were also significantly (p < 0.01) higher than those of malathion (2.4 ± 1.9 μg L− 1) and chlorpyrifos (0.8 ± 0.5 μg L− 1). Good correlation between measured and predicted values (r2 = 0.56–0.85, p < 0.01) showed that SYNOPS_2 is able to describe trends in runoff pollution in papaya plantations.

Linear equations were obtained in order to correct numerical disagreement between measured and calculated runoff concentrations. An independent test showed a reasonable agreement between measured chlorothalonil concentrations and the predicted values using the proposed equations. Fifteen pesticides used in papaya cultivation were ranked according to their calculated chronic biological risk index. Pesticides with the highest risk index for non-target organisms were: chlorothalonil for algae, lambda cyahalotrin for Daphnia and fish, and malathion for earthworms. Chlorothalonil was the pesticide with the highest exposure level in water and therefore represents a high risk for aquatic life. Results show that SYNOPS_2 can be used as a pesticide risk indicator on papaya and possibly other tropical fruit plantations.


7.
Artículo
*En hemeroteca, SIBE-Tapachula
Removal of chlorothalonil, methyl parathion and methamidophos from water by the fenton reaction
Gutiérrez, R. F. ; Santiesteban Hernández, Antonio (coaut.) ; Cruz López, Leopoldo Caridad (coaut.) ; Bello Mendoza, Ricardo (coaut.) ;
Contenido en: Environmental Technology Vol. 28, no. 3 (Mar 2007), p. 267-272 ISSN: 1479-487X
Bibliotecas: Tapachula
Cerrar
SIBE Tapachula
43195-10 (Disponible)
Disponibles para prestamo: 1
Nota: En hemeroteca, SIBE-Tapachula
Resumen en español

The efficiency of a dark Fenton system (H2O2/Fe2+) to remove chlorothalonil from water, alone and in the presence of the organophosphorous pesticides methyl parathion and methamidophos, was evaluated. Here we show that the process is rapid and efficient. Nearly complete degradation of chlorothalonil and methyl parathion (98%) was observed in less than 10 min whereas methamidophos showed similar levels of efficiency only after 40 to 90 min. Formulating agents did not appear to impair the degradation of active ingredients. Interactions during the degradation of mixtures of the three pesticides only appeared to affect methamidophos degradation.


8.
- Artículo con arbitraje
Volatiles of mango var. ataulfo characterized by SPME and capillary GC/MS spectroscopy
Salazar Sandoval, Ignacio ; Santiesteban Hernández, Antonio (coaut.) ; Velásquez Valdez, German (coaut.) ; Cruz López, Leopoldo Caridad (coaut.) ;
Contenido en: Journal of the Mexican Chemical Society Vol. 51, no. 3 (2007), p. 145-147 ISSN: 1870-249X
PDF
Resumen en: Español | Inglés |
Resumen en español

Los compuestos volátiles emitidos por flores y frutas verdes y maduras de mangos de la variedad Ataulfo del Soconusco, Chiapas fueron colectados por medio de la técnica de Microextracción en Fase Sólida (MEFS). El análisis químico de los volátiles se llevó a cabo por Cromatografía de Gases y Espectrometría de Masas (CG-EM). El análisis mostró que los volátiles del mango están formados por una mezcla principalmente demonoterpenos y sesquiterpenos. 3-careno, a-pineno, mirceno, limoneno, terpinoleno, ß-selineno y el sesquiterpeno tentativamente identificado como germacreno D fueron los principales constituyentes. Esta información será de mucha utilidad en los programas de mejoramiento genético de variedades de mango, ofreciendo así confirmación del éxito de las técnicas de polinización cruzada.

Resumen en inglés

Head space volatiles from flowers, as well as green andripe mango fruit of cv. Ataulfo from Soconusco, Chiapas, were col-lected using Solid Phase Microextraction (SPME). Identification ofchemical s pecies was carried out by Gas Chromatography-MassSpectrometry (GC-MS). A complex mixture of monoterpenes andsesquiterpenes was found. 3-carene, a-pinene, myrcene, limonene,terpinolene, ß-selinene and the sesquiterpene tentatively identified asgermacrene D were the major constituents. This information could bevaluable to characterize certain aspects of genetic traits, which in turnwill be useful for breeding programs, and to provide assessment ofcross pollination techniques.


9.
Capítulo de libro - Memoria en extenso sin arbitraje
*Solicítelo con su bibliotecario/a
Comparación del riesgo ecológico de plaguicidas utilizados en plantaciones de papaya: uso y validación del indicador synops
Hernández Hernández, Carlos Noé Alejandro (autor) ; Tovilla Hernández, Cristian (autor) ; Valle Mora, Javier Francisco (autor) ; Santiesteban Hernández, Antonio (autor) ; Bello Mendoza, Ricardo (autor) ;
Disponible en línea
Contenido en: Resúmenes : x congreso internacional de manejo integrado de plagas y agroecología / Alfredo Castillo, Jaime Gómez, Helda Morales, Jorge Toledo y Ramón Jarquín, editores Tapachula, Chiapas, México : El Colegio de la Frontera Sur, 2006 p. 101-101 ISBN:970-9712-22-5
Bibliotecas: San Cristóbal , Tapachula
Cerrar
SIBE San Cristóbal
51813-10 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE Tapachula
51813-20 (Disponible)
Disponibles para prestamo: 1
Nota: Solicítelo con su bibliotecario/a

10.
- Artículo con arbitraje
*En hemeroteca, SIBE-Tapachula
A new blend of white sapote fruit volatiles as potential attractant to Anastrepha ludens (Diptera : tephritidae)
González, Ricardo ; Toledo, Jorge (coaut.) ; Cruz López, Leopoldo Caridad (coaut.) ; Virgen Sánchez, Armando (coaut.) ; Santiesteban Hernández, Antonio (coaut.) ; Malo Rivera, Edi Álvaro (coaut.) ;
Contenido en: Journal of Economic Entomology Vol. 99, no. 6 (December 2006), p. 1994-2001 ISSN: 0022-0493
Bibliotecas: Tapachula
Cerrar
SIBE Tapachula
41786-10 (Disponible)
Disponibles para prestamo: 1
Nota: En hemeroteca, SIBE-Tapachula
Resumen en: Inglés |
Resumen en inglés

The behavioral and electrophysiological responses of nonirradiated male and female Anastrepha ludens (Loew) (Diptera: Tephritidae), to white sapote, Casimiroa edulis Oerst. (Rutaceae), volatiles were investigated. Females ßew upwind and landed more often on fruit than on artiÞcial fruit in wind tunnel bioassays. Males ßew upwind (but not landed) more frequently on fruit than on artiÞcial fruit. Porapak Q volatile extracts of white sapote also elicited upwind ßight and landing on artiÞcial fruit for both sexes. Gas chromatography-electroantennographic detection analysis of white sapote extracts revealed that antennae of both sexes responded to eight compounds. Two peaks were unidentiÞed because they did not separate from the solvent. Subsequent peaks were identiÞed by gas chromatography-mass spectrometry as styrene, myrcene, 1,2,4-trimethylbenzene, 1,8-cineole, and linalool in a proportion of 50: 21: 0.5: 27: 1.5, respectively. Eight peaks were tentatively identiÞed as -trans-ocimene. The number of A. ludens captured in multilure traps baited with the synthetic white sapote blend was higher than the ßies captured by the multilure unbaited traps (control) in Þeld cages. However, the number of ßies captured by traps baited with the white sapote blend was not different from that of ßies captured by traps baited with hydrolyzed protein. Using standard chemical ecology techniques, we found potential attractants from wild sapote fruit for monitoring and management of A. ludens population.