scholarly journals Geographic and Host Range of Meloidogyne spp. in North Central Mexico

Plant Disease ◽  
2001 ◽  
Vol 85 (4) ◽  
pp. 445-445 ◽  
Author(s):  
R. Velásquez-Valle
Keyword(s):  
Prunus Persica ◽  
Central Mexico ◽  
Root Knot Nematode ◽  
Dry Bean ◽  
North Central ◽  
First Report ◽  
San Luis ◽  
San Luis Potosi ◽  
Meloidogyne Spp ◽  
San Luis Potosí

A disease survey carried out in 1998, 1999, and 2000 in the states of Aguascalientes, San Luis Potosí, and Zacatecas revealed the dispersal of Meloidogyne spp in this region of Mexico. Pepper (Capsicum annuum L.) Mirasol type plants showing general chlorosis, root rot, and galls were observed in central Zacatecas and western San Luis Potosí. Dry bean (Phaseolus vulgaris L.) plants (Landrace Flor de Mayo) collected in western San Luis Potosí and Aguascalientes also showed root galls. Roots of squash (Cucurbita spp) and sunflower (Helianthus annuus L.) plants that showed galled roots were found under dryland conditions in northern Zacatecas. Nursery peach (Prunus persica L.) plantlets with no foliar symptoms but showing severe root galling were detected in Zacatecas. Perineal patterns of Meloidogyne females obtained from those galled roots were coincident with those of M. incognita according to pictoral keys (1). This is the first report of M. incognita affecting these hosts in that region of the country. Alfalfa (Medicago sativa) plants collected in Aguascalientes showed galls caused by Meloidogyne spp; this is the first report of this nematode affecting alfalfa in the state. Volunteer onion (Allium cepa L., ‘Grano Blanco’) plants growing in a squash field in eastern Zacatecas had galled roots; a few Meloidogyne spp. females were obtained from small galls. This is the first report of the root-knot nematode affecting onion plants in north central México. Onion is known to be a host for several species of this nematode (2). Stunted, chlorotic squash plants had roots severely galled by Meloidogyne spp, but pepper crops growing in the same field in previous years showed general chlorosis, reduced size, and poor yield did not have root galls. References: (1) Eisenback, J. D., et al. 1983. Guia para la identificación de las cuatro especiales más comunes del nematodo agallador (Meloidogyne spp.) con una clave pictorica. International Meloidogyne Project, Raleigh, NC. (2) Schwartz, H. F., and Mohan, S. K. 1995. Compendium of onion and garlic diseases. American Phytopathological Society. St. Paul. MN.

Cretaceous Platform of Valles-San Luis Potosi, Northeastern Central Mexico

1993 ◽  
Author(s):  
M. A. Basáñez-Loyola ◽  
R. Fernández-Turner ◽  
C. Rosales-Domínguez
Keyword(s):  
Central Mexico ◽  
San Luis ◽  
San Luis Potosi ◽  
San Luis Potosí

Diet and habitat of mesomammals and megamammals from Cedral, San Luis Potosí, México

2016 ◽  
Vol 155 (3) ◽  
pp. 674-684 ◽  
Author(s):  
VÍCTOR ADRIÁN PÉREZ-CRESPO ◽  
JOAQUÍN ARROYO-CABRALES ◽  
PEDRO MORALES-PUENTE ◽  
EDITH CIENFUEGOS-ALVARADO ◽  
FRANCISCO J. OTERO
Keyword(s):  
Dental Enamel ◽  
Mixed Diet ◽  
North Central ◽  
San Luis ◽  
San Luis Potosi ◽  
Oxygen Isotopic ◽  
Tree Coverage ◽  
Ground Sloth ◽  
Dire Wolf ◽  
San Luis Potosí

AbstractUsing carbon and oxygen isotopic relationships from dental enamel, diet and habitat were inferred for both mesomammals and megamammals that lived in Cedral (San Luis Potosi, north-central México) during Late Pleistocene time. δ13C and δ18O values show that bison, some horses and mammoth were eating C4 plants and lived in open areas, while tapir, camel and some llamas ate C3 plants and inhabited closed areas. All other studied herbivores (pronghorn, glyptodont, mylodont ground sloth, javelina, mastodon, and other llamas, horses and mammoth) had a C3/C4 mixed diet, living in areas with some percentage of tree coverage. On the other hand, American lion and dire wolf ate either C4 or mixed-diet herbivores, and short-faced bear ate C3 herbivores. At Cedral, more humid conditions existed than presently, allowing the presence of a forested area near the grassland.

scholarly journals First Report of Neoerysiphe sechii Causing Powdery Mildew on Sechium edule in San Luis Potosi, Mexico

Plant Disease ◽  
2021 ◽  
Author(s):  
Jorge Cadena-Iñiguez ◽  
Gildardo Olguín-Hernández ◽  
Moises Camacho-Tapia ◽  
Kamila C. Correia ◽  
Alma Rosa Solano-Báez ◽  
...  
Keyword(s):  
Powdery Mildew ◽  
Its Region ◽  
Morphological Data ◽  
Pathogenicity Test ◽  
Accession Number ◽  
First Report ◽  
San Luis ◽  
Sechium Edule ◽  
San Luis Potosi ◽  
San Luis Potosí

From 2018 to 2020, powdery mildew-like signs and symptoms were observed on chayote (Sechium edule var. virens levis) in a commercial field located in Santa María del Río, San Luis Potosí, Mexico. Signs appeared as whitish powdery masses on both sides of leaves and stems. Disease incidence was about 30% and signs covered up to 70% of leaf surface. Ten samples were collected and analyzed. Mycelium was amphigenous, persistent, white, in dense patches. Hyphal appressoria were lobed and solitary. Conidiophores (n = 30) were hyaline, erect, straight, and 62 to 101 μm long. Foot cells were cylindrical and straight, followed by 1–3 shorter cells, and forming conidia in short chains. Conidia (n = 100) were hyaline, surface striate, cylindrical-ellipsoid, doliiform or ovoid, 25.7 to 37.6 × 11.9 to 18.4 μm, without fibrosin bodies, and with germ tubes terminal or subterminal. Conidial appressoria were lobed. Chasmothecia were not observed. The morphological characters were consistent with those of the anamorphic state of Neoerysiphe sechii (Gregorio-Cipriano et al. 2020). A voucher specimen was deposited in the Herbarium of the Department of Agricultural Parasitology at the Chapingo Autonomous University under accession number UACH192. To confirm the identification of the fungus, genomic DNA was extracted from conidia and mycelium, and the internal transcribed spacer (ITS) region and part of the 28S gene were amplified by PCR and sequenced. The ITS region of rDNA was amplified using the primers ITS5/ITS4 (White et al. 1990). For amplification of the 28S rRNA partial gene, a nested PCR was performed using the primer sets PM3 (Takamatsu and Kano 2001)/TW14 (Mori et al. 2000) and NL1/TW14 (Mori et al. 2000) for the first and second reactions, respectively. Phylogenetic analyses using the maximum parsimony and maximum likelihood methods, including ITS and 28S sequences of isolates of Neoerysiphe spp. were performed and confirmed the results obtained in the morphological analysis. The isolate UACH192 grouped in a clade with isolates of N. sechii. The ITS + 28S sequence was deposited in GenBank under accession number MZ468642. Pathogenicity was confirmed by gently dusting conidia from infected leaves onto ten leaves of healthy chayote plants. Five non-inoculated leaves served as controls. The plants were maintained in a greenhouse at 25 to 30 ºC, and relative humidity of 60 to 70%. All inoculated leaves developed similar symptoms to the original observation after 8 days, whereas control leaves remained disease free. Microscopic examination of the fungus on inoculated leaves showed that it was morphologically identical to that originally observed. The pathogenicity test was repeated twice with similar results. Based on morphological data and phylogenetic analysis, as well as pathogenicity test, the fungus was identified as N. sechii. This pathogen has been previously reported causing powdery mildew on S. edule and S. mexicanum in Veracruz, Mexico (Gregorio-Cipriano et al. 2020). However, to our knowledge, this is the first report of N. sechii causing powdery mildew on chayote in San Luis Potosí (Central Mexico). This pathogen represents a serious threat to chayote production and disease management strategies should be developed.

Strontium isotopes and mobility of a Columbian mammoth (Mammuthus columbi) population, Laguna de las Cruces, San Luis Potosí, México

2016 ◽  
Vol 153 (4) ◽  
pp. 743-749 ◽  
Author(s):  
VÍCTOR ADRIÁN PÉREZ-CRESPO ◽  
PETER SCHAAF ◽  
GABRIELA SOLÍS-PICHARDO ◽  
JOAQUÍN ARROYO-CABRALES ◽  
LUIS M. ALVA-VALDIVIA ◽  
...  
Keyword(s):  
Dental Enamel ◽  
Strontium Isotopes ◽  
The Other ◽  
Central Mexico ◽  
Isotopic Ratios ◽  
San Luis ◽  
San Luis Potosi ◽  
Leaching Procedure ◽  
San Luis Potosí

AbstractBy using strontium isotopic ratios of dental enamel from molars, we were able to reconstruct the migration context for three individuals of a Columbian mammoth population (Mammuthus columbi) around Laguna de las Cruces, San Luis Potosí, central México. A three-step leaching procedure was applied to eliminate secondary Sr contributions in the molar enamel. One of the studied individuals showed 87Sr/86Sr ratios similar to those obtained from soils and plants from Laguna de las Cruces and was identified as local, whereas the other two mammoths had different molar 87Sr/86Sr values, indicative of migration and mobility contexts.

Counterclockwise rotations in the Late Eocene–Oligocene volcanic fields of San Luis Potosí and Sierra de Guanajuato (eastern Mesa Central, Mexico)

2014 ◽  
Vol 637 ◽  
pp. 289-304 ◽  
Author(s):  
Louis Andreani ◽  
Jerôme Gattacceca ◽  
Claude Rangin ◽  
Juventino Martínez-Reyes ◽  
François Demory
Keyword(s):  
Late Eocene ◽  
Central Mexico ◽  
San Luis ◽  
San Luis Potosi ◽  
Volcanic Fields ◽  
San Luis Potosí

scholarly journals Medical therapeutic itineraries of women with breast cancer diagnosis affiliated to the People's Health Insurance in San Luis Potosí, central Mexico

2015 ◽  
Vol 31 (1) ◽  
pp. 60-70 ◽  
Author(s):  
Luz María Tejada-Tayabas ◽  
Liseth Amell Salcedo ◽  
Joel Monárrez Espino
Keyword(s):  
Breast Cancer ◽  
Health Insurance ◽  
Screening Program ◽  
Cancer Control ◽  
Diagnostic Process ◽  
Central Mexico ◽  
Diagnose Breast Cancer ◽  
San Luis ◽  
San Luis Potosi ◽  
San Luis Potosí

This study aims to describe the medical itineraries followed by breast cancer women affiliated to the People's Health Insurance in San Luis Potosí, central Mexico. We used an ethnographic approach based on oral histories of 12 women diagnosed with breast cancer in the year prior to the first meeting. Two face-to-face sessions per participant lasting 60 minutes each were conducted followed by a telephone interview. Content and diachronic analyses were used. Three main itineraries were identified: (1) diagnostic process, (2) final diagnosis to treatment, and (3) cancer control and relapse. Findings suggested that infrastructure and human resources to adequately screen and timely diagnose breast cancer were scant and insufficiently trained, respectively. Deferral of medical assessment was related with lack of information about breast cancer consequences, with women being afraid of a positive result, and with economic constraints. The current screening program needs to be redesigned to prevent diagnostic delays, as these seem to explain the high frequency of advanced stages reported at the time of diagnosis.

Eocene to Quaternary mafic-intermediate volcanism in San Luis Potosí, central Mexico: The transition from Farallon plate subduction to intra-plate continental magmatism

2014 ◽  
Vol 276 ◽  
pp. 152-172 ◽  
Author(s):  
Alfredo Aguillón-Robles ◽  
Margarito Tristán-González ◽  
Gerardo de Jesús Aguirre-Díaz ◽  
Rubén A. López-Doncel ◽  
Hervé Bellon ◽  
...  
Keyword(s):  
Central Mexico ◽  
San Luis ◽  
San Luis Potosi ◽  
Continental Magmatism ◽  
San Luis Potosí ◽  
Plate Subduction
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