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222 resultados encontrados para: AUTOR: Cruz López, Leopoldo Caridad
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1.
Artículo
*Solicítelo con su bibliotecario/a
(S)-2-Heptanol, the alarm pheromone of the stingless bee Melipona solani (Hymenoptera, Meliponini)
Alavez Rosas, David (autor) ; Sánchez Guillén, Daniel (autor) ; Malo Rivera, Edi Álvaro (autor) ; Cruz López, Leopoldo Caridad (autor) ;
Disponible en línea
Contenido en: Apidologie Vol. 50, no. 3 (July 2019), p. 277-287 ISSN: 1297-9678
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

Timely defence response is critical in any highly social bee species. Chemical signalling is closely linked to this behaviour, and several pheromones have been discovered. In this work, we identified the pheromone ofthe stingless bee Melipona solani and evaluated the electrophysiological and behavioural response of the bee to the identified compound. We determined that the mandibular glands serve as the reservoir of the alarm pheromone. Because enantiomeric recognition has been scarcely examined, we performed bioassays and electroantennographic (EAG) studies to determine the role of chirality in pheromone recognition. We found that (S)-2-heptanol was the active compound involved in the alarm response of this species. Although we did not find (R)-2-heptanol in the mandibular gland extracts, bees responded to it in a similar way to the (S)-isomer and to a racemic mixture. The behavioural response of M. solani was flight, different from other Melipona species behaviour. We discuss these findings in an evolutionary and ecological framework.


2.
- Artículo con arbitraje
A reinvestigation of brindley’s gland exocrine compounds of Rhodnius prolixus (Hemiptera: Reduviidae)
Rojas, Julio C. ; Ríos Candelaria, Eder (coaut.) ; Cruz López, Leopoldo Caridad (coaut.) ; Santiesteban Hernández, Antonio (coaut.) ; Bond Compeán, Juan Guillermo (coaut.) ; Brindis Ruíz, Yolanda Concepción (coaut.) ; Malo Rivera, Edi Álvaro (coaut.) ;
Clasificación: AR/595.754 / R4
Contenido en: Journal of Medical Entomology Vol. 39, no. 2 (2002), p. 256-265 ISSN: 0022-2585
Cerrar
SIBE Chetumal
ECO030000322 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE San Cristóbal
SER001399 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE Tapachula
ECO020010047 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE Villahermosa
ECO050002452 (Disponible)
Disponibles para prestamo: 1
PDF
Resumen en: Español |
Resumen en español

A chemical, electrophysiological and behavioral study was carried out to analyze the volatile compounds of the Brindley's gland of Rhodnius prolixus Stål. Six compounds were found in the Brindley's gland of males and females: acetic, isobutyric, caproic acids and three compounds not identified. The mass spectra of the unidentified compounds have the appearance of a propionate ester, a butyrate ester and a valerate ester. There was no difference in the concentration of these compounds in the glands of males and females. The major component was isobutyric acid. The electroantennographic (EAG) evaluation of isobutyric, acetic, and caproic acids elicited weak responses. With both sexes, the EAG responses for the acids were no different from the control response at any of the doses evaluated (1, 10, 100, and 500 microg). The behavioral response of males and females to acetic, isobutyric, and caproic acids at 1, 5, and 10 microg and binary and tertiary mixtures of the three compounds was evaluated in a Y-olfactometer. Males showed preference for acetic acid at a dose of 1 microg, but not at 5 or 10 microg. Females showed preference for this compound at the dose of 5 microg. Males showed preference for isobutyric acid at 1 and 5 microg, but not at 10 microg. Females did not show any preference for isobutyric acid. Males were attracted to caproic acid at the dose of 1 and 10 microg. Females were attracted to the caproic acid. Males, but not females, preferred the mixture of acetic and isobutyric acids over control. Neither males nor females showed preference for the mixture of acetic and caproic acids or hexane control. Females, but not males, were attracted to the mixture of the isobutyric and caproic acids. Only males showed a positive response for the tertiary mixture of the acids.


3.
Capítulo de libro
Actividad interespecífica de la feromona de agregación de adultos de Triatoma mazzottii (Hemiptera; reduviidae)
Cruz López, Leopoldo Caridad ; Malo Rivera, Edi Álvaro (coaut.) ; Rojas, Julio C. (coaut.) ;
Clasificación: S/614.53372 / C71
Contenido en: V simposio nacional de entomología médica y veterinaria: memoria Oaxaca, México, 1990 p. 25-32
Bibliotecas: San Cristóbal , Tapachula
Cerrar
SIBE San Cristóbal
SER000788 (Disponible) , SER000311 (Disponible)
Disponibles para prestamo: 2
Cerrar
SIBE Tapachula
ECO020010111 (Disponible) , ECO020010110 (Disponible)
Disponibles para prestamo: 2

4.
- Artículo con arbitraje
Aggregation pheromone in five species of triatominae (Hemiptera: reduviidae)
Cruz López, Leopoldo Caridad ; Malo Rivera, Edi Álvaro (coaut.) ; Rojas, Julio C. (coaut.) ;
Clasificación: AR/614.533 / C7
Contenido en: Memórias do Instituto Oswaldo Cruz Vol. 88, no. 4 (Oct.-Dic. 1993), p. 535-539 ISSN: 0074-0276
Bibliotecas: San Cristóbal , Tapachula
Cerrar
SIBE San Cristóbal
SER000727 (Disponible) , SER000140 (Disponible)
Disponibles para prestamo: 2
Cerrar
SIBE Tapachula
ECO020010100 (Disponible)
Disponibles para prestamo: 1
PDF

5.
Artículo
*En hemeroteca, SIBE-Tapachula
Aggregation pheromone of the agave weevil Scyphophorus acupunctatus
Ruiz Montiel, César ; García Coapio, Guadalupe (coaut.) ; Rojas, Julio C. (coaut.) ; Malo Rivera, Edi Álvaro (coaut.) ; Cruz López, Leopoldo Caridad (coaut.) ; del Real Laborde, José Ignacio (coaut.) ; Hernández González, H. (coaut.) ;
Contenido en: Entomologia Experimentalis et Applicata Vol. 127, no. 3 (2008), p. 207-217 ISSN: 0013-8703
Bibliotecas: Tapachula
Cerrar
SIBE Tapachula
10409-30 (Disponible)
Disponibles para prestamo: 1
Nota: En hemeroteca, SIBE-Tapachula
Resumen en: Inglés |
Resumen en inglés

The agave weevil, Scyphophorus acupunctatus Gyllenhal (Coleoptera: Curculionidae), is the most important insect pest of wild and cultivated agaves in the world. Combined gas chromatographyelectroantennography (GC-EAD) analysis of male volatile extracts showed that four peaks elicited antennal responses from males and females. The peaks were identified by GC-mass spectrometry (GC-MS) as 2-methyl-4-heptanol (1), 2-methyl-4-octanol (2), 2-methyl-4-heptanone (3), and 2-methyl-4-octanone (4). Electroantennogram (EAG) recordings of both sexes to 0.01-, 0.1-, 1-, and 10- μ g stimulus load of synthetic compounds showed that the dose of the tested compounds and weevil sex significantly influenced the antennal response of S. acupunctatus . However, there was no sexual dimorphism in the antennal responses to the four synthetic compounds evaluated because the EAG profiles revealed no interaction between doses by sex.

Antennae of S. acupunctatus were most sensitive to compounds 2 and 4, reaching the threshold at a 0.01- μ g stimulus load. Weevil antennae were less sensitive to compounds 1 and 3, and the threshold response to these compounds was 0.1 μ g. Behavioural evaluation of the synthetic compounds showed them to be attractive to both males and females in a Y-tube olfactometer. Field experiments confirmed the laboratory results, showing that all components, singly or in blends, were attractive to the weevils. In general, traps baited with the quaternary blend of compounds 1–4 captured significantly more weevils than traps baited with males. However, compounds 3 and 4 were sufficient to obtain captures equivalent to those by the quaternary blend. The potential use of the aggregation pheromone in the development of a masstrapping programme as a viable pest management alternative for S. acupunctatus is discussed.


6.
Tesis - Licenciatura
Aislamiento e identificación química de la feromona sexual de la mosca de la fruta Anastrepha obliqua (Diptera: tephritidae) / Araceli Ibáñez López
Ibáñez López, Araceli ; Cruz López, Leopoldo Caridad (director) ;
Tapachula, Chiapas, México : Universidad Autónoma de Chiapas. Facultad de Ciencias Químicas, Campus IV , 1999
Clasificación: TE/632.774 / I2
Bibliotecas: San Cristóbal , Tapachula
Cerrar
SIBE San Cristóbal
ECO010016291 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE Tapachula
ECO020003117 (Disponible)
Disponibles para prestamo: 1

7.
- Artículo con arbitraje
Alkaloids in the venom of Messor ants
Cruz López, Leopoldo Caridad ; Jackson, Brian D. (coaut.) ; Hefetz, Abraham (coaut.) ; Morgan, E. David (coaut.) ;
Contenido en: Biochemical Systematics and Ecology Vol. 34, no. 3 (March 2006), p. 199-204 ISSN: 0305-1978
Resumen en: Inglés |
Resumen en inglés

Tobacco alkaloids of the anabasine type have been found or confirmed in the venom of five species of arid-dwelling Messor ants. They are frequently accompanied by alkylpyrazines. Messor mediorubra contains four alkaloids, with anabasine the major component and also minor pyrazines. Anabasine was found alone in the venom of Messor semirufus and confirmed in Messor ebeninus. Messor rugosus from Tel Aviv contained a mixture of alkaloids and pyrazines, but those from Ein Yahav contained 3-ethyl-2,5- dimethylpyrazine, some 2-phenylethylamine, and N-ethylidene 2-phenylethylamine. Messor arenarius is confirmed as having a complex but variable mixture of alkaloids and pyrazines.


8.
- Artículo con arbitraje
*Solicítelo con su bibliotecario/a
Annual capture of two elachistidae moth species using Stenoma catenifer sex Pheromone in criollo avocado (Persea americana) at Chiapas, Mexico
Vázquez López, Miguel Ángel ; Cruz López, Leopoldo Caridad (coaut.) ; Gómez Ruiz, Jaime (coaut.) ; Castillo Vera, Alfredo (coaut.) ;
Contenido en: Southwestern Entomologist Vol. 42, no. 1 (Mar. 2017), p. 91-101 ISSN: 2162-2647
Nota: Solicítelo con su bibliotecario/a
PDF
Resumen en: Inglés |
Resumen en inglés

Native varieties of avocado (Persea americana Mill) called “Criollo” grow in Mexico, but little is known of their association with the seed borer moth, Stenoma catenifer (Walsingham). S. catenifer is the best-known pest of ‘Hass’ avocado fruit. The S. catenifer sex pheromone was used to capture male S. catenifer in Criollo avocado orchards at different elevations at Chiapas, Mexico from September 2012 to August 2013. Polynomial regression analysis was used to assess the relationship between numbers of moths caught and weather factors (precipitation and temperature). We thought temperature and precipitation might affect the moths captured. Initial S. catenifer captures coincided with crop flowering and presence of avocado fruit, independently of the altitude at the site. S. catenifer was caught frequently at the low-altitude site from December to January, while captures increased from February to May at higher altitude. Moths captured and precipitation were positively correlated at the low-altitude site; moths captured were correlated with temperature but not with rainfall at the high-altitude site. As expected, S. catenifer pheromone also attracted Antaeotricha nictitans (Zeller) in the avocado crop. Interestingly, A. nictitans was captured in all seasons, even in larger numbers than S. catenifer. A new unidentified moth species in the Elachistidae family was present from late May to 10 July and was more abundant at Site 2.


9.
Artículo
Antennal olfactory sensitivity in response to task-related odours of three castes of the ant Atta mexicana (Hymenoptera: formicidae)
López Riquelme, Germán Octavio ; Malo Rivera, Edi Álvaro (coaut.) ; Cruz López, Leopoldo Caridad (coaut.) ; Fanjul Moles, María Luisa (coaut.) ;
Contenido en: Physiological Entomology Vol. 31, no. 4 (November 2006), p. 353–360 ISSN: 0307-6962
Resumen en: Inglés |
Resumen en inglés

The relationship between scent composition and antennal sensitivity in different castes of Atta mexicana is investigated under laboratory conditions. Extracts of dead ants are analysed by gas chromatography-mass spectrometry to identify the compounds presumably responsible for the specific undertaking behaviour. Oleic acid is identified as one compound that triggers undertaking behaviour. To determine differences in odour reception between workers of different castes (i.e. foragers, undertakers and soldiers), further antennal sensitivity to task-related odours is tested using electroantennographic techniques. Soldiers are the most specialized caste because of their low response to all odours, except odourants related to alarm pheromones. The behavioural specialization of soldiers and their reduced behavioural repertoire are discussed.


10.
- Artículo con arbitraje
*En hemeroteca, SIBE-Tapachula
Antennal sensilla and electrophysiological response of male and female Spodoptera frugiperda (Lepidoptera: Noctuidae) to conspecific sex pheromone and plant odors
Malo Rivera, Edi Álvaro ; Castrejón Gómez, Víctor Rogelio (coaut.) ; Cruz López, Leopoldo Caridad (coaut.) ; Rojas, Julio C. (coaut.) ;
Contenido en: Annals of the Entomological Society of America Vol. 97, no. 6 (2004), p. 1273-1284 ISSN: 0013-8746
Bibliotecas: Tapachula
Cerrar
SIBE Tapachula
3270-20 (Disponible)
Disponibles para prestamo: 1
Nota: En hemeroteca, SIBE-Tapachula
Resumen en: Inglés |
Resumen en inglés

The olfactory system of male and female Spodoptera frugiperda (J. E. Smith) was studied by examining the morphology and distribution of antennal sensilla and determining the responses of both sexes to conspecific female sex pheromone components and plant volatiles using electroantennography (EAG). Seven types of sensilla were observed on the flagellum of the antennae: trichodea, chaetica, coeloconica, styloconica, auricilica, squamiformia, and basiconica. Only one type of trichodea sensilla was found on the antennae of both sexes, but these sensilla were more abundant on male than on female. EAG records of both sexes to 10-µg stimulus loads of six pheromone components showed that (Z)-7-dodecenyl acetate (Z7-12: Ac) and (Z)-9-dodecenyl acetate (Z9-12: Ac) elicited larger responses than those evoked by (Z)-11-hexadecenyl acetate (Z11-16: Ac), (Z, E)-9,11-tetradecadienyl acetate (Z9, E11-14: Ac), (Z, E)-9,12-tetradecadienyl acetate (Z9, E12-14: Ac), and hexane in female antennae. In the case of male antennae, (Z)-9-tetradecenyl acetate (Z9-14: Ac) and Z9, E12-14: Ac evoked larger EAG responses than those elicited by Z7-12: Ac, Z11-16: Ac, Z9, E11-14: Ac, and hexane.

The compounds that selectively evoked larger EAG responses from males than females were Z9, E12-14: Ac, and Z9-14: Ac. Dose-response experiments showed that, at the lowest dose tested, Z9-14: Ac and Z9, E12-14: Ac elicited larger EAG responses than Z9-12: Ac and Z7-12: Ac in male antennae. At the highest doses tested, the diene elicited the largest EAG responses. In the case of female antennae, the dose, but not the pheromone component, had a significant effect. Male and female responses to 10-µg stimulus loads of 16 plant volatiles showed that hexan-1-ol evoked larger EAG responses in comparison with those elicited by hexanal, (E)-3-hexenol, 2-carene, phellandrene, limonene, β-pinene, and hexane. The response of male antennae was significantly stronger than the female. Dose-response experiments showed that both sexes appeared to be most sensitive to alcohols, particularly at the highest dose tested.