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Publications (107)
Mexico generates specific phytosanitary regulations for each product and origin to prevent the entry of quarantine pests and/or delay their spread within the national territory, including fungi and oomycetes. Phytosanitary regulations are established based on available information on the presence or absence of these pathogens in the country; howeve...
In this study, the ability of high-throughput sequencing (HTS) to detect viruses in vegetable prickly pear cactus was exploited. Samples from State of Mexico (EDMX), Hidalgo, and Morelos, as well as Mexico City (CDMX), were analyzed. In the sample from EDMX, the genomes of Opuntia virus 2 (OV2, genus Tobamovirus) and Cactus carlavirus 1 (CCV-1, gen...
The objective of this research was to identify the causal agent of asparagus rhizome rot, as well as evaluate different inoculation methods and the severity of the isolates. Sampling was carried out in five producing plots Atenco, Edo. from Mexico. Five isolates of Fusarium spp. were selected. (one per plot) to perform pathogenicity tests. Three is...
Fungal sclerotia house native bacterial populations of interest for biological control of plant pathogenic fungi. The objectives of this research were: i) to explore the bacterial populations associated with Claviceps gigantea sclerotia in maize from six locations in the State of Mexico, ii) to evaluate the in vitro antagonism of these bacterial po...
Se determina la sensibilidad de Sporisorium reilianum f. sp. zeae a diferentes fungicidas en condiciones de in vitro, como factor previo a su uso en campo. Para cada fungicida se evaluaron cinco concentraciones: 0.0001, 0.001, 0.01, 0.1 y 1 gramo de ingrediente activo por litro; la cantidad necesaria para preparar dichas concentraciones fue adicion...
span lang="EN-US">The incidence of maize monkey´s hand disease was determined in nine states of the Mexican Republic. The evaluation sites were georeferenced, and incidence was estimated along with the farmers to determinate the identity of the germplasm used. Monkey´s hand was found affecting maize plants in localities of the States of Puebla with...
Pseudomonas fluorescentes y Bacillus spp. se encuentran entre las bacterias con mayor potencial para el control biológico de enfermedades en plantas. Los objetivos de esta investigación fueron: i) identificar especies de Pseudomonas fluorescentes y Bacillus de la rizósfera de agaves silvestres antagonistas de bacterias pectinolíticas, y ii) detecta...
Banderita ( Bouteloua curtipendula ), produces abundant and appetizing forage for cattle under extreme arid conditions. The demand for its seed in Mexico is a direct function of the potential for the establishment of pastures and therefore, the sanitary quality of this is fundamental. Phytopathogenic fungi affect the seed and establishment of prair...
Background: The central area of the state of Veracruz is widely known as one of the regions with the largest hectares dedicated to the production of potato (Solanum tuberosum L.), this is susceptible to different diseases, an strategy of managements is with applications of growth-promoting rhizobacteria that have yielded favorable results in other...
p> Background: The central area of the state of Veracruz is widely known as one of the regions with the largest hectares dedicated to the production of potato ( Solanum tuberosum L.), this is susceptible to different diseases, an strategy of managements is with applications of growth-promoting rhizobacteria that have yielded favorable results in ot...
Diaphorina citri se considera la plaga más peligrosa de los cítricos debido a que transmite a Candidatus Liberibacter asiaticus agente causal del Huanglongbing (HLB). Al igual que otros insectos hemipteros, D. citri ha desarrollado interacciones mutualistas con organismos procariontes, conocidos como endosimbiontes. Estas relaciones pueden ser de t...
Anthracnose, caused by Colletotrichum spp., is the most significant field and post-harvest disease of mango worldwide and is mainly controlled through the use of systemic fungicides belonging to the methyl benzimidazole carbamate (MBC) class. In Mexico, this disease in mango has been associated with at least seven cryptic species belonging to the C...
La semilla es una importante forma de diseminación de patógenos; para determinar aquellos asociados a semilla comercial de variedades de pasto Banderita: NdeM-La Zarca, NdeM-303, NdeM-5, NdeM-Zenith, NdeM-La resolana, se analizaron tres tipos de propágulo: espiguillas completas (cariópside + brácteas accesorias; M1), cariópside únicamente con lemas...
Objetivo: Describir la actividad antifúngica de los extractos de P. luteoalbum obtenidos con propanona, hexano, cloruro de metileno y metanol contra Fusarium oxysporum f.sp. lycopersici raza 3. Diseño/metodología/aproximación: Se cultivaron ejemplares de P. luteoalbum establecidos a partir de semilla y se obtuvieron extractos con propanona, hexano,...
Wilt is currently the most critical disease affecting blackberry crops in Mexico, and more than 2,500 ha have been lost to the disease to date. Thus, the objectives of this research were: a) to determine the etiology of blackberry crop wilt in Mexico and b) to evaluate strategies for season-long integrated disease management. From 2013 to 2015, fun...
Mango anthracnose, caused by Colletotrichum spp., is the most significant disease of mango in almost all production areas around the world. In Mexico, mango anthracnose has been only attributed to C. asianum and C. gloeosporioides. The aims of this study were to identify the species of Colletotrichum associated with mango anthracnose symptoms in Me...
El hongo Puccina graminis f. sp. tritici es el agente causal de la roya del tallo del trigo (Triticum aestivum), éste puede causar pérdidas del rendimiento hasta de 40 % en variedades susceptibles, además puede mutar y vencer genes de resistencia, por lo que es necesario identificar nuevas fuentes de resistencia para combatir las razas virulentas d...
El hongo Puccina graminis f. sp. tritici es el agente causal de la roya del tallo del trigo (Triticum aestivum), éste puede causar pérdidas del rendimiento hasta de 40 % en variedades susceptibles, además puede mutar y vencer genes de resistencia, por lo que es necesario identificar nuevas fuentes de resistencia para combatir las razas virulentas d...
p>El lirio de día ( Hemerocallis spp.) es atacado por el hongo Puccinia hemerocallidis . En México no existen reportes de esta enfermedad o de material vegetal resistente al patógeno. Desde 2008, se han observado síntomas de roya sobre hojas de H. lilioasphodelus en el jardín de una casa particular en el municipio de Chicoloapan de Juárez, Estado d...
The fungus Puccina graminis f. sp. tritici is the causal agent of wheat (Triticum aestivum) stem rust, it can cause yield losses of up to 40 % in susceptible varieties; it can also mutate and overcome resistance genes, so it is necessary to identify new sources of resistance to fight the virulent races of this pathogen. Bread wheat advanced line Ki...
La zarzamora ( Rubus sp.) es una frutilla atacada por el género Botrytis . En México se desconoce que especies están involucradas con el síntoma de moho gris. El objetivo de este estudio fue identificar las especies de Botrytis asociadas a zarzamora. En noviembre-diciembre de 2016, se realizaron muestreos en 17 áreas productoras de zarzamora en Méx...
Es posible que exista tolerancia al virus de la mancha anular del papayo (PRSV-p) en plantas nativas de Carica papaya. Se evaluó la respuesta de 13 accesiones (Acc) de papayo nativo y la variedad Maradol roja respecto a la incidencia y severidad del PRSV-p, inoculado con el insecto vector Aphis nerii, y su relación con el manejo de la planta observ...
Para demostrar la eficiencia de productos inductores de la resistencia a enfermedades en maíz, en 2016 y 2017 se establecieron ensayos en el Campo Experimental de la Universidad Autónoma del Estado de México, Campus Toluca, con el híbrido de maíz comercial BG1384W, donde se estudió la eficiencia de seis agroquímicos como inductores de resistencia,...
Neobuxbaumia tetetzo (Coulter) Backeberg (tetecho) is a columnar cactus endemic to Mexico. Tetecho plants, flowers, fruits, and seeds play an important role in the semiarid ecosystem, as they serve as a refuge and food for insects, bats, and birds, and are widely used by ethnic groups since pre-Hispanic times. Tetecho is affected by a soft rot that...
Mango malformation induced by Fusarium spp. is one of the most destructive diseases worldwide. The production losses vary from 50 to 80%. Mango growth is intermittent being characterized by resting periods (RP) intercalary between each vegetative flow. Each new flush promotes changes in the intensity of epidemics, but the interaction of the RPs on...
During 2015, leaves, stems, and pods of Tecoma stans showing symptoms of galls, rust, and powdery mildew were collected from public gardens located in Panotla, Tlaxcala, Mexico. The fungi present in the tissues were characterized morphologically using light microscopy. Galls on leaves, stems, and pods and erumpent pustules on leaves were associated...
p>La pimienta gorda se ha visto afectada por antracnosis, enfermedad que ataca frutos provocando manchas marrón-oscuras hundidas, hasta necrosar los frutos. Entre 2015-2016 en el norte de Veracruz se colectaron frutos de pimienta gorda con y sin síntomas de antracnosis, de estos se obtuvieron 13 cultivos monospóricos; posteriormente fueron caracter...
Fusarium Head Blight (FHB) is a destructive disease of small grain cereals and a major food safety concern. Epidemics result in substantial yield losses, reduction in crop quality, and contamination of grains with trichothecenes and other mycotoxins. A number of different fusaria can cause FHB, and there are significant regional differences in the...
This study reports for the first time the presence of citrus psorosis virus (CPsV) in Persian lime (Citrus latifolia) orchards from five counties of the Veracruz state, the main producer and exporter of this fruit in Mexico. The disease was detected in 2016 only in plants grafted on non-certified rootstocks: Volkamerian lemon, Sour orange, Swingle,...
p>El maíz ( Zea mays ) ocupa el segundo lugar como alimento en el mundo y la sequía limita su productividad. Las plantas albergan bacterias endófitas que influyen en la sanidad y tolerancia a la sequía. El objetivo de esta investigación fue estimar la densidad y diversidad de las bacterias endófitas cultivables de la raíz en siete líneas homocigóti...
Resumen. La pimienta gorda se ha visto afectada por antracnosis, enfermedad que ataca frutos pro-vocando manchas marrón-oscuras hundidas, hasta necrosar los frutos. Entre 2015-2016 en el norte de Veracruz se colectaron frutos de pimienta gorda con y sin síntomas de antracnosis, de estos se ob-tuvieron 13 cultivos monospóricos; posteriormente fueron...
p>El carbón de la espiga ( Sporisorium reilianum f. sp. zeae ) del maíz ( Zea mays L.) es una enfermedad de gran importancia que se presenta en zonas productoras de maíz, incluyendo los Valles del Mezquital y Toluca. El objetivo del presente estudio fue identificar líneas C<sub>2</sub>-S<sub>1</sub> y C<sub>2</sub>-S<sub>2</sub> de maíz adaptadas a...
Chemical control of plant diseases exerts high selection pressure for the development of pathogen resistance to fungicides. The objectives of this study were to quantify the existence of late blight in Solanum tuberosum L., detect the presence of variants of the oomycete resistant to agrochemicals and compare the different levels of resistance in t...
Citrus exocortis viroid (CEVd) is a regulated pathogen in Mexican citriculture. The diagnosis by indexing to detect the presence and transmission of CEVd in propagative material of germplasm banks is of official application. The aim of this study was characterizing to CEVd by in vitro and in vivo indexing to analyzing the efficiency of the transmis...
El objetivo de este estudio fue documentar información sobre nuevas plantas hospederas y nuevos registros de distribución geográfica de Melanagromyza floris Spencer, M. tomaterae Steyskal, M. viridis (Frost) y Ophiomyia lantanae (Froggatt). Se realizaron colectas de puparios de agosto de 2007 a agosto de 2008 sobre Tithonia sp. en Tonatico, Estado...
La enfermedad “diente de caballo” del maíz (Claviceps gigantea) afecta hasta 90 % del grano. Se estudiaron condiciones para germinación de esclerocios, formación de estructuras sexuales y se describe parte del ciclo del hongo en laboratorio y campo. Se estableció un diseño con sustrato y tiempo de incubación a 4 °C. Se evaluaron porcentaje de escle...
Malformation disease is an important disease of mango (Mangifera indica L.) worldwide. This disease was first observed in 2008 in mango orchards in Azua and Peravia, provinces of Dominican Republic. Vegetative symptoms included loss of apical dominance, swollen apical and lateral buds; fasciculated, thickened and misshapen stems with shortened inte...
Ammi majus L. (family Apiaceae), known as bishop’s weed, is a medicinal and ornamental plant widely distributed in parts of Europe, the Mediterranean, and western Asia. During July to September 2013, typical symptoms of powdery mildew were observed on bishop’s weed cultivated in gardens throughout Estado de México, Mexico. Diseased plants exhibited...
During September to November of 2013 and 2014, typical symptoms of powdery mildew were detected on the leaves of netleaf oak (Quercus rugosa) trees growing in the Distrito Federal (Mexico). Symptoms appeared as irregular necrotic lesions with greyish powdery masses on both sides of the leaves. The preliminary identification of fungus was done based...
El objetivo de la investigación fue identificar los factores socioeconómicos y parasitológicos que limitan la producción del cacao en Chiapas, México. Se llevaron a cabo encuestas y visitas a 109 productores de las dos principales regiones productoras. Entre los resultados más importantes se registró que solamente el 14.7 % de los productores culti...
During September to November of 2013 and 2014, typical symptoms of powdery mildew
were detected on the leaves of netleaf oak (Quercus rugosa) trees growing in the Distrito Federal
(Mexico). Symptoms appeared as irregular necrotic lesions with greyish powdery masses on both
sides of the leaves. The preliminary identification of fungus was done based...
The species Casimiroa edulis, Diospyros digyna, Psidium guajava, and Annona reticulata were reported as new host plants of Chlorocoris distinctus in Mexico. This species exhibited maternal care of eggs and nymphs, but despite this behavior, 52.9% of the egg masses and as much as 43% of eggs, were parasitized by Trissolcus occiduus (Hymenoptera: Pla...
The species Casimiroa edulis, Diospyros digyna, Psidium guajava, and Annona reticulata were reported as new host plants of Chlorocoris distinctus in Mexico. This species exhibited maternal care of eggs and nymphs, but despite this behavior, 52.9% of the egg masses and as much as 43% of eggs, were parasitized by Trissolcus occiduus (Hymenoptera: Pla...
Endosulfan (EN), chlorpyrifos (CRP) and chlorothalonil (CTL) are carcinogenic and toxic pesticides in the environment, by which bioremediation efficient actions must be directed for detoxifying contaminated systems. Fungi such as Phanerochaete chrysosporium (PC), Trametes versicolor (TV) and some species of Trichoderma (TRI), Mucor, Fusarium and Pe...
The main goal of this research was to identify the socioeconomic and parasitological factors that limit cocoa production in Chiapas, Mexico. One hundred and nine cacao-growers were visited and interviewed in the two main cocoa-producing regions. According to results only 14.7 % farmers grow white-almond cacao. The average production unit is 2.6 hec...
Este estudio se llevó a cabo en Ceballos del municipio de Mapimí, Durango con el objetivo de evaluar la efectividad del extracto de gobernadora (Larrea tridentata (D.C.) coville (L.)), para el control de cenicilla en el cultivo de melón. Se estableció un experimento en una parcela de 2,500 bajo un diseño de bloques con arreglo de parcelas sub sub-d...
In the State of Mexico, cut rose (Rosa x hybrida) grown under greenhouse conditions has as a commercial constraint the low phytosanitary quality of its flower buds. To improve this quality, three growth regulators containing cytokinins (two commercial products and one prepared at a dose of 0.001 ppm from a technical-grade growth regulator, all at t...
Anthracnose caused by Colletotrichum gloeosporioides, is the most important postharvest disease in mango (Mangifera indica L.) producing areas worldwide, and the strategy most used to control this disease is the pre-and post-harvest treatment with fungicides, but their use is increasingly restricted due to public awareness of hazardous residues in...
Anthracnose caused by Colletotrichum gloeosporioides, is the most important postharvest disease in mango (Mangifera indica L.) producing areas worldwide, and the strategy most used to control this disease is the pre-and post-harvest treatment with fungicides, but their use is increasingly restricted due to public awareness of hazardous residues in...
El objetivo de este estudio fue determinar si la reflectancia espectral de imágenes de satélite QuickBird permite diferenciar árboles de aguacate (Persea americana Mill.) infectados por el viroide de la mancha de sol, ASBVd (Avocado sunblotch viroid) de árboles sanos o asintomáticos, así como diferenciar árboles de aguacate de otras especies presen...
The objective of this work was to determine if spectral images form the QuickBird satellite can differentiate avocado (Persea americana Mill.) trees infected with Avocado sunblotch viroid (ASBVd) from healthy or asymptomatic trees, and also from other tree species. Differentiation between healthy and ASBVd symptomatic trees was approached with the...
Endosulfan (EN), chlorpyrifos (CRP) and chlorothalonil (CTL) are carcinogenic and toxic pesticides in the environment, by which bioremediation efficient actions must be directed for detoxifying contaminated systems. Fungi such as Phanerochaete chrysosporium (PC), Trametes versicolor (TV) and some species of Trichoderma (TRI), Mucor, Fusarium and Pe...
One of the most important phytosanitary problems in two-year plantations of Agave tequilana var. Azul. is agave wilt, that is caused by several organisms, among those pathogens are reported several species of Fusarium and Thielaviopsis pradoxa. The main goal of this research was to introduce beneficial organisms in micropropagation plants as contro...
Cowpea is one of the most important grain legume crops worldwide. Although Pseudocercospora cruenta on cowpea was first observed in Mexico in 1976, this is the first documented report of this pathogen in Mexico. The fungus was isolated from symptomatic cowpea leaves collected from Nayarit state, Mexico and identified on the basis of morphology and...
Dieback of sapote mamey [Pouteria sapota (Jacq.) H. E. Moore and Stearn] grafts caused by Lasiodiplodia theobromae significantly reduces the success of grafting in Mexican nurseries. Semi-commercial tests were conducted in a sapote mamey nursery during two grafting seasons to evaluate the effectiveness of a physical treatment (washing) and three ch...
Dieback of sapote mamey [Pouteria sapota (Jacq.) H. E. Moore and Stearn] grafts caused by Lasiodiplodia theobromae significantly reduc- es the success of grafting in Mexican nurseries. Semi-commercial tests were conducted in a sapote mamey nursery during two grafting sea- sons to evaluate the effectiveness of a physical treatment (washing) and thre...
The Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP), in Zacatepec Morelos, started a genetic improvement program of wild and semi-cultivated poinsettia plants (nochebuena de sol). It is important to generate a phytos-anitary database that allows the release of new varieties and hybrids that provide tolerance to the...
The fungus Moniliophthora roreri, causal agent of frosty pod rot, is the main limiting disease of cocoa (Theobroma cacao) production in Tabasco, México. The fungicide azoxystrobin was assessed as a healing agent of M. roreri. In vitro, azoxystrobin at 450 mg L-1 inhibited 100 % of the conidial germination and 96 % of mycelium growth at 1250 mg L-1....
The objective of this work was to develop an inoculation method with teliospores of the fungus Sporisorium reilianum f. sp. zeae in maize seeds resulting in a consistently high rate of infection of seedlings, and implement its use in maize germplasm selection programs for resistant to this pathogen. Susceptible maize seeds to the disease were inocu...
El brócoli contiene glucorafano, este compuesto ha mostrado actividad anticancerígena. El contenido del glucorafano, al igual que otros parámetros de calidad, pueden ser afectados por la precocción a la cual son sometidos los floretes de brócoli para comercializarlos. El presente trabajo tuvo como objeto determinar el efecto de tratamientos de prec...
Flower necrosis, rot, and dropping of young fruits of the papaya (Carica papaya L.) are diseases with high incidence and which reduce productivity of commercial groves in Huamuxtitlán, Guerrero, Mexico. The objective of the present study was to determine the etiology and epidemiology of these diseases. Cladosporium sp. and Fusarium spp. were isolat...
The temporal progress of anthracnose (Colletotrichum gloeosporioides) epidemics was studied in mango (Mangifera indica) orchards treated with fungicides from different chemical groups, mode of action, and application sequences in two regions of contrasting climates (sub-humid and dry tropics) in Guerrero, Mexico. Full flowering, initial setting, an...
In Alpoyeca, Guerrero, México, floral necrosis is a disease of unknown etiology that occurs with high incidence (80 to 100 %) in sapotes mamey (Pouteria sapota) and reduces the productivity of commercial orchards. The objectives of the present study were to determine the etiology and temporal progress of the disease. Penicillium olsonii and Alterna...
The control of black Sigatoka (Mycosphaerella fijiensis) of banana (Musa acuminate Colla AAA) and (Musa balbisiana Colla AAB) requires numerous applications of fungicides, mainly of the triazoles group that impose high selection pressure in populations of this pathogen. The aim of the this study was to determine the response of strains of Mycosphae...
Flower necrosis, rot, and dropping of young fruits of the papaya (Carica papaya L.) are diseases with high incidence and which reduce productivity of commercial groves in Huamuxtitlán, Guerrero, Mexico. The objective of the present study was to determine the etiology and epidemiology of these diseases. Cladosporium sp. and Fusarium spp. were isolat...
In Alpoyeca, Guerrero, México, floral necrosis is a disease of unknown etiology that occurs with high incidence (80 to 100 %) in sapotes mamey (Pouteria sapota) and reduces the productivity of commercial orchards. The objectives of the present study were to determine the etiology and temporal progress of the disease. Penicillium olsonii and Alterna...
The control of black Sigatoka (Mycosphaerella fijiensis) of banana (Musa acuminate Colla AAA) and (Musa balbisiana Colla AAB) requires numerous applications of fungicides, mainly of the triazoles group that impose high selection pressure in populations of this pathogen. The aim of the this study was to determine the response of strains of Mycosphae...
En México, la antracnosis del mango (Colletotrichum spp.) es la principal enfermedad que afecta el rendimiento y calidad de este frutal en pre y postcosecha. Su control químico se ha concentrado en el uso continuo de fungicidas sistémicos del grupo de los benzimidazoles, los cuales presentan alto riesgo de generar resistencia. En este estudio se pl...
