Subjects -> AGRICULTURE (Total: 981 journals)
    - AGRICULTURAL ECONOMICS (93 journals)
    - AGRICULTURE (680 journals)
    - CROP PRODUCTION AND SOIL (120 journals)
    - POULTRY AND LIVESTOCK (58 journals)

AGRICULTURE (680 journals)                  1 2 3 4 | Last

Showing 1 - 200 of 263 Journals sorted alphabetically
aBIOTECH : An International Journal on Plant Biotechnology and Agricultural Sciences     Hybrid Journal   (Followers: 2)
Aceh International Journal of Science and Technology     Open Access   (Followers: 6)
Acta agriculturae Slovenica     Open Access   (Followers: 2)
Acta Agrobotanica     Open Access   (Followers: 3)
Acta Agronomica Hungarica     Full-text available via subscription   (Followers: 3)
Acta Agronomica Sinica     Full-text available via subscription   (Followers: 4)
Acta Aquatica Turcica     Open Access   (Followers: 1)
Acta Biologica Sibirica     Open Access   (Followers: 1)
Acta Fytotechnica et Zootechnica     Open Access   (Followers: 2)
Acta Scientiarum Polonorum Technica Agraria     Open Access   (Followers: 1)
Acta Scientiarum. Animal Sciences     Open Access   (Followers: 5)
Acta Scientifica Malaysia     Open Access   (Followers: 1)
Acta Technologica Agriculturae     Open Access   (Followers: 1)
Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis     Open Access   (Followers: 2)
Acta Universitatis Sapientiae, Alimentaria     Open Access   (Followers: 2)
Advanced Research in Life Sciences     Open Access   (Followers: 2)
Advances in Agriculture     Open Access   (Followers: 14)
Advances in Agriculture & Botanics     Open Access   (Followers: 5)
Advances in Agronomy     Full-text available via subscription   (Followers: 20)
Advances in Horticultural Science     Open Access   (Followers: 4)
Advances in Life Science and Technology     Open Access   (Followers: 10)
Africa Research Bulletin: Political, Social and Cultural Series     Hybrid Journal   (Followers: 22)
African Journal of Food, Agriculture, Nutrition and Development     Open Access   (Followers: 15)
African Journal of Range & Forage Science     Hybrid Journal   (Followers: 12)
Agra Europe     Full-text available via subscription   (Followers: 3)
Agribusiness : an International Journal     Hybrid Journal   (Followers: 6)
Agric     Open Access   (Followers: 1)
Agricultura     Open Access   (Followers: 3)
Agricultura Tecnica     Open Access   (Followers: 2)
Agricultura Tropica et Subtropica     Open Access   (Followers: 2)
Agricultura, Sociedad y Desarrollo     Open Access   (Followers: 2)
Agricultural & Environmental Letters     Open Access   (Followers: 4)
Agricultural and Food Science     Open Access   (Followers: 14)
Agricultural Commodities     Full-text available via subscription   (Followers: 1)
Agricultural Economics     Open Access   (Followers: 6)
Agricultural Economics : The Journal of the International Association of Agricultural Economists     Hybrid Journal   (Followers: 60)
Agricultural History Review     Full-text available via subscription   (Followers: 14)
Agricultural Research     Hybrid Journal   (Followers: 9)
Agricultural Science     Full-text available via subscription   (Followers: 1)
Agricultural Sciences     Open Access   (Followers: 5)
Agricultural Systems     Hybrid Journal   (Followers: 35)
Agricultural Water Management     Hybrid Journal   (Followers: 50)
Agriculture     Open Access   (Followers: 2)
Agriculture     Open Access   (Followers: 6)
Agriculture & Food Security     Open Access   (Followers: 19)
Agriculture and Food Sciences Research     Open Access   (Followers: 9)
Agriculture and Human Values     Open Access   (Followers: 25)
Agriculture, Ecosystems & Environment     Hybrid Journal   (Followers: 63)
AGRIEAST : Journal of Agricultural Sciences     Open Access   (Followers: 2)
AgriEngineering     Open Access  
Agrinova (Agrotechnology Innovation)     Open Access   (Followers: 1)
Agriprobe     Open Access   (Followers: 1)
Agriscience     Open Access   (Followers: 1)
Agrisost     Open Access   (Followers: 1)
Agritech     Open Access   (Followers: 1)
AGRITROPICA : Journal of Agricultural Sciences     Open Access   (Followers: 1)
Agrivet : Jurnal Ilmu-Ilmu Pertanian dan Peternakan / Journal of Agricultural Sciences and Veteriner)     Open Access   (Followers: 4)
Agrivita : Journal of Agricultural Science     Open Access  
Agro Sur     Open Access  
Agro-Science     Full-text available via subscription   (Followers: 2)
Agroalimentaria     Open Access  
Agrociencia     Open Access  
Agrociencia Uruguay     Open Access  
Agroecological journal     Open Access  
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 2)
Agronomía & Ambiente     Open Access  
Agronomía Costarricense     Open Access  
Agronomía Mesoamericana     Open Access  
Agronomía Tropical     Open Access  
Agronomie Africaine     Full-text available via subscription  
Agronomy     Open Access   (Followers: 12)
Agronomy Science     Open Access  
Agrosains : Jurnal Penelitian Agronomi     Open Access  
Agrosearch     Open Access  
Agrosintesa Jurnal Ilmu Budidaya Pertanian     Open Access  
Agrosystems, Geosciences & Environment     Open Access   (Followers: 4)
Agrotechnology Research Journal     Open Access  
Agrotekma : Jurnal Agroteknologi dan Ilmu Pertanian     Open Access  
Agrotrop : Journal on Agriculture Science     Open Access   (Followers: 1)
AL-Qadisiya Journal For Agriculture Sciences     Open Access  
American Journal of Agricultural and Biological Sciences     Open Access   (Followers: 6)
American Journal of Botany     Full-text available via subscription   (Followers: 17)
American Journal of Economics and Sociology     Hybrid Journal   (Followers: 36)
American Journal of Potato Research     Hybrid Journal   (Followers: 2)
American Journal of Rural Development     Open Access   (Followers: 5)
Analytical Science Advances     Open Access   (Followers: 1)
Animal - Open Space     Open Access   (Followers: 2)
Animal Diseases     Open Access  
Animal Microbiome     Open Access   (Followers: 1)
Annales des Sciences Agronomiques     Full-text available via subscription  
Annals of Agricultural Sciences     Open Access   (Followers: 1)
Annals of Arid Zone     Open Access   (Followers: 1)
Annals of Silvicultural Research     Open Access  
Annual Review of Resource Economics     Full-text available via subscription   (Followers: 10)
Applied Financial Economics Letters     Hybrid Journal   (Followers: 8)
Aquacultura Indonesiana     Open Access  
Arboricultural Journal : The International Journal of Urban Forestry     Hybrid Journal   (Followers: 6)
Archiva Zootehnica     Open Access  
Archives of Current Research International     Open Access  
Archivos de Zootecnia     Open Access   (Followers: 1)
ARO. The Scientific Journal of Koya University     Open Access  
Arthropod-Plant Interactions     Hybrid Journal   (Followers: 2)
Artificial Intelligence in Agriculture     Open Access   (Followers: 1)
Asia-Pacific Journal of Rural Development     Hybrid Journal   (Followers: 2)
Asian Economic Papers     Hybrid Journal   (Followers: 8)
Asian Food Science Journal     Open Access   (Followers: 1)
Asian Journal of Advances in Agricultural Research     Open Access  
Asian Journal of Agricultural and Horticultural Research     Open Access  
Asian Journal of Agricultural Extension, Economics & Sociology     Open Access   (Followers: 1)
Asian Journal of Agricultural Research     Open Access   (Followers: 6)
Asian Journal of Agriculture     Open Access  
Asian Journal of Medical and Biological Research     Open Access   (Followers: 3)
Asian Journal of Plant Sciences     Open Access   (Followers: 2)
Asian Journal of Research in Agriculture and Forestry     Open Access   (Followers: 1)
Asian Plant Research Journal     Open Access  
Asian Research Journal of Agriculture     Open Access   (Followers: 1)
Atatürk Üniversitesi Ziraat Fakültesi Dergisi     Open Access  
Australian Cottongrower, The     Full-text available via subscription  
Australian Economic Papers     Hybrid Journal   (Followers: 10)
Australian Economic Review     Hybrid Journal   (Followers: 4)
Australian Forest Grower     Full-text available via subscription   (Followers: 2)
Australian Forestry     Hybrid Journal   (Followers: 1)
Australian Grain     Full-text available via subscription  
Australian Holstein Journal     Full-text available via subscription   (Followers: 1)
Australian Journal of Agricultural and Resource Economics     Hybrid Journal   (Followers: 4)
Australian Journal of Agricultural Engineering     Open Access   (Followers: 1)
Australian Sugarcane     Full-text available via subscription  
Avances en Investigacion Agropecuaria     Open Access   (Followers: 1)
Bangladesh Agronomy Journal     Open Access  
Bangladesh Journal of Agricultural Research     Open Access   (Followers: 1)
Bangladesh Journal of Scientific Research     Open Access  
Berichte aus dem Julius Kühn-Institut     Open Access  
Berkala Ilmiah Pertanian     Open Access   (Followers: 1)
BHUMI : Jurnal Agraria dan Pertanahan     Open Access  
Bioagro     Open Access  
Biocatalysis and Agricultural Biotechnology     Hybrid Journal   (Followers: 3)
Biochar     Hybrid Journal   (Followers: 1)
Biocontrol Science and Technology     Hybrid Journal   (Followers: 5)
Biodiversity     Hybrid Journal   (Followers: 25)
Biodiversity : Research and Conservation     Open Access   (Followers: 28)
BIOFIX Scientific Journal     Open Access  
Biological Agriculture & Horticulture : An International Journal for Sustainable Production Systems     Partially Free   (Followers: 10)
Biosystems Engineering     Hybrid Journal   (Followers: 8)
Biotecnología en el Sector Agropecuario y Agroindustrial     Open Access  
Boletín Semillas Ambientales     Open Access  
Botanica Orientalis : Journal of Plant Science     Open Access  
British Poultry Science     Hybrid Journal   (Followers: 6)
Buletin Peternakan : Bulletin of Animal Science     Open Access   (Followers: 1)
Buletin Veteriner Udayana     Open Access   (Followers: 1)
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca : Food Science and Technology     Open Access   (Followers: 1)
CABI Agriculture and Bioscience     Open Access   (Followers: 1)
Caderno de Ciências Agrárias     Open Access  
Cahiers Agricultures     Open Access  
California Agriculture     Open Access   (Followers: 1)
Cambridge Journal of Economics     Hybrid Journal   (Followers: 77)
Canadian Water Resources Journal     Hybrid Journal   (Followers: 18)
Capitalism Nature Socialism     Hybrid Journal   (Followers: 21)
Caraka Tani : Journal of Sustainable Agriculture     Open Access  
Ceiba     Open Access  
Central European Forestry Journal     Open Access   (Followers: 1)
Cereal Chemistry     Full-text available via subscription   (Followers: 4)
CESifo Economic Studies     Hybrid Journal   (Followers: 23)
Ceylon Journal of Science     Open Access  
Chemical and Biological Technologies for Agriculture     Open Access   (Followers: 1)
Chilean Journal of Agricultural & Animal Sciences     Open Access  
Chilean Journal of Agricultural Research     Open Access   (Followers: 1)
Ciencia e Investigación Agraria     Open Access  
Ciência e Técnica Vitivinícola     Open Access  
Ciencia forestal en México     Open Access   (Followers: 1)
Ciencia, Tecnología y Salud     Open Access  
Científic@ : Multidisciplinary Journal     Open Access  
COCOS : The Journal of the Coconut Research Institute of Sri Lanka     Open Access   (Followers: 1)
Coffee Science     Open Access  
Cogent Food & Agriculture     Open Access  
Competition & Change     Hybrid Journal   (Followers: 12)
Compost Science & Utilization     Hybrid Journal  
Computers and Electronics in Agriculture     Hybrid Journal   (Followers: 7)
Corpoica Ciencia y Tecnología Agropecuaria     Open Access  
CSA News     Hybrid Journal   (Followers: 1)
Cuadernos de Desarrollo Rural     Open Access  
Cultivos Tropicales     Open Access  
Cultura Agronômica : Revista de Ciências Agronômicas     Open Access  
Cultural Geographies     Hybrid Journal   (Followers: 20)
Cultural Sociology     Hybrid Journal   (Followers: 34)
Cultural Studies - Critical Methodologies     Hybrid Journal   (Followers: 17)
Cultural Studies of Science Education     Hybrid Journal   (Followers: 10)
Cultural Trends     Hybrid Journal   (Followers: 13)
Culture, Agriculture, Food and Environment     Hybrid Journal   (Followers: 21)
Culture, Agriculture, Food and Environment     Hybrid Journal   (Followers: 8)
Current Agricultural Science and Technology     Open Access  
Current Agriculture Research Journal     Open Access  
Current Applied Science and Technology     Open Access  
Current Protocols in Plant Biology     Hybrid Journal   (Followers: 2)
Current Research in Dairy Sciences     Open Access   (Followers: 3)
Diatom Research     Hybrid Journal   (Followers: 3)
Dinamika Pertanian     Open Access  
Dissertationen aus dem Julius Kühn-Institut     Open Access  
Dossiers Agraris     Open Access  
E-Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology)     Open Access  
Ecological Applications     Full-text available via subscription   (Followers: 133)

        1 2 3 4 | Last

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Chilean Journal of Agricultural & Animal Sciences
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Print) 0719-3882 - ISSN (Online) 0719-3890
Published by SciELO Homepage  [672 journals]

    • Abstract: ABSTRACT This study aimed to evaluate the lactation curve of female Murrah buffaloes, using mixed nonlinear models (NLM), across three lactation periods (180 d, 210 d, and 240 d). A total of 5334 data on daily milk production (kg) were analyzed. The data were collected every seven days in the interval of one to 250 days of lactation, corresponding to 221 lactations and 145 females, with calvings from 2017 to 2019. The data came from a herd located in the Centro municipality, Tabasco, Mexico. Five NLM were evaluated: Wood (WOD), Wiltmink (WIL), Cobby (COB), Brody (BRO), Sikka (SIK). The best fit model was selected based on the mean prediction error, mean absolute percentage error (MAPE), prediction error variance, coefficient of determination (R2), concordance correlation coefficient (CCC), Akaike (AIC) and Bayesian (BIC) information criteria. A regression analysis was performed between the observed and predicted values. All the NLM had a R2 above 0.91. They tend to underestimate the predictions, without residual autocorrelation. The MAPE showed an average value of 23.5%. The best fit model was WOD, followed by SIK and BRO. For WIL and COB, the mixed model did not improve the fitting. The shortest lactation period showed the best fit, followed by the 210 d and 240 d periods. The relationship between observed:predicted values fluctuated from 0.65 to 1.00, with an average value of 0.94. The use of NLM transcended in the AIC and BIC. The evaluated models showed goodness of fit, with good predictability, but low values in accuracy and precision of prediction.

    • Abstract: ABSTRACT Multivariate analysis of morphological variables has been successfully used to estimate genetic variation within and between local breeds. The objective of this study was to differentiate Hararghe highland goat populations based on their morphometric traits by applying multivariate analysis. Sixteen morphometric traits were collected from 450 goats reared in the three agroecological zones (highland, midland and lowland) of West Hararghe. Multivariate canonical discriminant analysis in combination with cluster and discriminant analysis was applied to identify the combination of variables that differentiate goats of the three agroecological zones. The results indicated that all the morphometric traits were significantly affected by age. The cluster analysis indicated that two main groups of midland goats were included in one group, while group two included highland and lowland goats under one sub-cluster. The canonical discriminant analysis identified two canonical variables (CAN) of which CAN1 and CAN2 accounted for 68.2 and 31.8% of the total variation, respectively. The quadratic discriminant analysis correctly assigned the respective 71.3, 77.3, and 81.3% of lowland, midland, and highland goat populations into their source populations, with an overall accuracy rate of 76.7%. The Mahalanobis distance verified that lowland and highland goats are the closest, while midland and highland goats were the furthest. However, the canonical discriminant analysis indicated a visible overlapping between goat populations of the three agroecological zones, indicating the existence of homogeneity among them. In conclusion, multivariate analysis identified 11 morphometric traits as the most imperative traits to differentiate Hararghe highland goat populations effectively. Genetic potentials of Hararghe highland goat populations can be improved through community-based breeding programs for their sustainable utilization and conservation.

    • Abstract: ABSTRACT The aim of this study was to describe the early growth of Pelibuey lambs raised under an intensive production system in Colima, Mexico, using non-linear models. Weight data were collected from 433 lambs every 30 days from birth to 180 days of age, and growth curves were estimated using non-linear and linear models. According to goodness of fit criteria, the Linear, Gomperrz, Logistic and Von Bertalanffy models are suitable and show a reasonable fit for describing Pelibuey lamb's growth, the Brody and Richards curves did not meet the convergence criterion. The parameter A denotes asymptotic weight; weight was higher in multiple born males and quadruplet born females in the Von Bertalanffy and Gomperrz models, while it was also higher in males in the Logistic model. The parameter k represents maturation rate and indicates the growth speed in reaching asymptotic weight, being higher in single and twin females, and single males in all the non-linear models. From birth up to 90 days of age (weaning), weight of single lambs becomes greater than that of multiple born lambs, but from 90 days of age, weight of multiple born lambs tends to equal that of singles, which happens at 180 days of age. The early growth of Pelibuey lambs can be described with similar precision using linear and non-linear models.

    • Abstract: ABSTRACT Extensive livestock systems have decreased in the last decades. In general, these systems are characterized by low profitability, but they have a key role on environment conservation, maintenance of rural population, and health of meat and milk consumers. The present study was carried out in 2017 with 29 livestock farmers in the cold steppe area, Rio Ibáñez District (Comuna de Rio Ibánez), Aysén Region, Chile. The objective of this work was to compare the characteristics of extensive cattle and sheep farms of Southern Chile with a previous study conducted in 2012, assess their sustainability in 2017 and propose improvement actions. The variables studied were included in five attributes according to MESMIS methodology: Productivity, Stability, Adaptability, Equity and Self-management. There were few and circumstantial changes between 2012 and 2017. The global sustainability index was calculated (58%). The values of the five sustainability attributes were 54-64%. The results indicate that livestock farmers carry out valuable practices for sustainability, such as Cattle carry out short seasonal migration, Farmer vaccinates animals, Farmer desparasites animals, Does soil analyses and Farmer has done training courses. The suggested actions to improve sustainability are related to farm and farmer's characteristics, including trading through farmers' associations and off-farm activities. Collaborative work between livestock farmers and government institutions is required to implement the proposed actions. It is also important to raise consumers' awareness of the importance of extensive production systems and the differentiated quality of their products.
           paraguariensis Saint Hil.)

    • Abstract: RESUMEN Los hongos fitopatógenos afectan a cultivos agrícolas, como la yerba mate (Ilexparaguariensis Saint Hil.). Una alternativa innovadora para el control de plagas es el empleo de hongos biocontroladores del género Trichoderma. Los objetivos del presente trabajo fueron aislar los agentes fúngicos causantes de lesiones foliares en yerba mate, y evaluar la capacidad antagónica de los aislamientos nativos de Trichoderma sp. frente a patógenos en este cultivo. A partir del corte, desinfección y siembra del tejido vegetal enfermo, se aisló e identificó morfológica y molecularmente un hongo fitopatógeno perteneciente a la especie Alternaria alternata. Se ensayaron pruebas de patogenicidad en plantas de yerba mate por triplicado. Se realizaron lesiones mecánicas superficiales en ellas y se inoculó el aislamiento fitopatógeno obtenido (conidios y micelio) para evaluar su capacidad fitopatógena. Se determinaron nuevas variantes de cultivo dual para evaluar la capacidad antagónica biocontroladora en condiciones in vitro. Se evaluó la capacidad biocontroladora in vitro de 30 aislamientos de Trichoderma frente al aislamiento fitopatógeno obtenido. Como control positivo se utilizó una cepa aislada de un producto fungicida comercial a base de T. harzianum. Se determinó que 18 de los 30 aislamientos de Trichoderma lograron inhibir en más del 50% el crecimiento del fitopatógeno A. alternata y presentaron diferencias estadísticamente significativas con respecto al control positivo. Estos resultados reafirman la efectividad de utilizar aislamientos biocontroladores nativos ya adaptados a las condiciones edafo-climáticas del ambiente en donde se encuentra el microorganismo fitopatógeno a controlar biológicamente.ABSTRACT Phytopathogenic fungi attack many agricultural crops such as yerba mate (Ilex paraguariensis Saint Hil.). An innovative alternative for pest control is the use of biocontrol fungi of Trichoderma genus. The objectives of the present work were to isolate the fungal agents that cause foliar lesions in yerba mate, and to evaluate the antagonistic capacity of native Trichoderma sp. isolates against pathogens in this crop. From diseased plant-tissues, a phytopathogenic fungus belonging to Alternaria alternata species was isolated and identified morphologically and molecularly. Pathogenicity assays were done on yerba mate plants in triplicate. Superficial mechanical lesions were made on them and the phytopathogenic isolation obtained (conidia and mycelium) was inoculated to evaluate their phytopathogenic capacity. New dual culture methods were determined to evaluate in vitro antagonism of Trichoderma. The in vitro biocontrol capacity of 30 Trichoderma isolates was evaluated against the phytopathogenic isolation obtained. As a positive control, a strain isolated from a commercial fungicide product based on T. harzianum was used. It was determined that 18 of the 30 isolates of Trichoderma inhibited the growth of the phytopathogen A. alternata by more than 50%, and presented statistically significant differences with respect to the positive control. These results confirm the effectiveness of using native biocontrol isolates adapted to the climatic and soil conditions where the phytopathogenic microorganisms are found.
           bassiana FOR Diatraea saccharalis CONTROL

    • Abstract: RESUMEN El desarrollo y uso de plaguicidas microbianos para el control de plagas agrícolas se ha intensificado en los últimos años, debido a la creciente necesidad de reducir el uso de agroquímicos de alta toxicidad. Pero para suplir esta creciente necesidad de bioplaguicidas, es necesario desarrollar formulaciones adecuadas que estabilicen a los microorganismos frente a los factores ambientales de estrés que reducen su eficacia y persistencia de en campo. En este contexto, el objetivo del presente trabajo fue determinar la actividad insecticida y persistencia en plantas de caña de un concentrado emulsionable (CE) a base de Beauveria bassiana para el control del barrenador de la caña, Diatraea sp. La fotoestabilidad frente a la radiación UV tipo B y las concentraciones letales media y noventa del bioplaguicida también se determinaron bajo condiciones de laboratorio. El CE presentó una eficacia superior al 80% para el control de larvas de D. saccharalis bajo condiciones semicontroladas de campo. La formulación fotoestabilizó eficientemente los conidios, manteniendo un 68,9% de germinación después de nueve minutos de irradiación, mientras que los conidios sin formular perdieron completamente la capacidad de germinar. Este efecto también se observó para la actividad insecticida, ya que los conidios sin formular perdieron un 30% más de eficacia que los conidios formulados, después de nueve minutos de irradiación. La actividad insecticida y el recuento de conidios en plantas de caña de azúcar en campo disminuyeron a partir de la primera y segunda semana después de la aplicación, respectivamente. Aunque el CE a base de B. bassiana demostró una efectiva actividad insecticida contra D. saccharalis, es necesario realizar estudios de campo para optimizar la formulación y determinar el método y frecuencia de aplicación que permitan maximizar su desempeño.ABSTRACT The development and use of microbial pesticides for the control of agricultural pests has intensified in recent years due to the increasing need for reductions in the use of highly toxic agrochemicals. To fill this growing need for biopesticides it is necessary to develop suitable formulations that stabilize microorganisms against environmental stress factors that reduce their efficacy and persistence in the field. In this context, the objective of the present work was to determine the insecticidal activity and persistence on sugarcane plants, of an emulsifiable concentrate (EC) containing Beauveria bassiana for the control of sugarcane borer, Diatraea sp. Photostability of the formulation under UV radiation type B and the mean and ninety lethal concentrations were also determined under laboratory conditions. The EC reached more than 80% efficacy against D. saccharalis larvae under semi-controlled field conditions. The EC efficiently photostabilized the conidia, maintaining 68.9% germination after nine minutes of irradiation while unformulated conidia completely lost the ability to germinate. This effect was also observed for the insecticidal activity, with unformulated conidia losing 30% more efficacy than formulated conidia after nine minutes of irradiation. The insecticidal activity and conidia count on sugarcane plants under field conditions decreased one and two weeks post application, respectively. Although the EC containing on B. bassiana demonstrated effective insecticidal activity against D. saccharalis, it is necessary to carry out field trials to optimize the formulation and determine the method and frequency of application to maximize its performance.

    • Abstract: RESUMEN La presencia de hormigas en los apiarios ha sido considerada durante mucho tiempo un problema para la apicultura. En la producción apícola es muy importante el aspecto sanitario de las colmenas, ya que las abejas melíferas son afectadas por virus, bacterias, hongos y parásitos. Penicillium, Aspergillus y Fusarium son micotoxigénicos con una amplia distribución en el mundo. Se ha demostrado la presencia de estos hongos en el tubo digestivo de las abejas y en la miel. Una de las bacterias más estudiadas como antagonistas es Bacillus. El objetivo del estudio fue determinar la actividad antifúngica de Bacillus subtilis frente Aspergillus sección nigri y Fusarium solani. Se realizó el aislamiento en Agar nutritivo de B. subtilis de cutículas de hormigas de colmenares de los valles templados de la provincia de Jujuy, Argentina. Los hongos fueron provistos por el cepario del Laboratorio de Microbiología Agrícola y Sanidad Apícola y Meliponícola de la Facultad de Ciencias Agrarias, UNJu. Las pruebas de antagonismo se realizaron en placas con medio agar papa dextrosa con explantes de los hongos frente a Bacillus subtilis incubadas a 28°C durante una semana. Se registraron los diámetros de las colonias y se determinó el porcentaje de inhibición a los 5, 10 y 15 días. Los porcentajes de inhibición fueron mayores a los 5 días de incubación. El porcentaje de inhibición fue mayor al 50% en Aspergillus sección nigri y mayor al 65% en Fusarium solani. Bacillus subtilis mostró actividad antifúngica contra los hongos patógenos de abejas en estudio.ABSTRACT The presence of ants in apiaries has long been considered a problem for beekeeping. The health of the hives is a key issue in beekeeping since honey bees are affected by viruses, bacteria, fungi and parasites. Penicillium, Aspergillus and Fusarium are mycotoxigenic fungi, which are widely distributed throughout the world. The presence of these fungi has been observed in both the digestive tract of bees and honey. One of the most studied bacteria as antagonists is Bacillus. The objective of the study was to determine the antifungal activity of Bacillus subtilis against Aspergillus section nigri and Fusarium solani. The isolation was carried out in nutritive agar of B. subtilis from cuticles of ants from apiaries of the temperate valleys of the province of Jujuy, Argentina. The fungal strains were obtained from the strain collection of the Laboratory of Agricultural Microbiology and Beekeeping/ Stingless beekeeping Health of the Faculty of Agrarian Sciences, UNJu. The antagonism tests were performed on plates with potato dextrose agar medium with explants of the fungi against Bacillus subtilis incubated at 28 ° C for one week. Colony diameters were recorded, and the percentage of growth inhibition was determined at 5, 10 and 15 days. The inhibition percentages were higher after 5 days of incubation. The inhibition percentage was greater than 50% in Aspergillus section nigri and greater than 65% in Fusarium solani. Bacillus subtilis showed antifungal activity against the pathogenic fungi of bees under study.
  • CHARACTERIZATION OF Cochliobolus sativus AND Pyrenophora teres FUNGI

    • Abstract: ABSTRACT Barley (Hordeum vulgare) is generally used for animal feed, and food and beer production industries. Its production is affected by phytopathogens, of which Ramularia collo-cygni, Puccinia spp., Pyrenophora teres and Cochliobolus sativus are of global concern. In Mexico, there are few studies available on the morphological and molecular identification of fungi responsible for causing fungal diseases of barley. Therefore, the objective of this work was to identify, morphologically and molecularly, fungi isolated from barley seeds. The strains were identified by morphological analysis and by sequencing of the conserved ITS1/5.8s/ITS2 region of the ribosomal gene. Morphologically, the strains were identified as P. teres and C. sativus, which was confirmed with bioinformatics techniques using BLAST and MEGA6 programs. The results showed that the strains isolated from barley seeds in the highlands of Mexico were consistent with the sequences of P. teres and C. sativus deposited in the GenBank. These results will allow identifying some of the species of native fungi found in barley seeds.

    • Abstract: ABSTRACT Pteridium aquilinum (L.) Kuhn is a cosmopolitan plant with great competitive abilities, including allelopathy. The search for plants with negative allelopathic effects on other undesirable plants has led to the discovery of new useful substances for weed control. The objective of this research was to evaluate the allelopathic effect of P. aquilinum on seed germination and growth of four economically important weeds: Bidens pilosa L., Brachiaria decumbens Stapf, Emilia sonchifolia (L.) DC. ex DC and Rumex crispus L. Two experiments were conducted under laboratory and greenhouse conditions using extracts and dried plant residues of P. aquilinum, respectively. For the first experiment, extracts of bracken were obtained using four different solvents (hexane, dichloromethane, ethyl acetate, and methanol) and applied to the test seeds; germination rates were determined. For the second experiment, dry residues of bracken were applied to the soil at concentrations of 2, 5, and 10% and their effect on weed growth variables was determined; a control treatment (no appliacation) was also included. In addition, the presence of some chemical groups associated with each type of extract was qualitatively detected. The extracts inhibited seed germination by 52 - 97% in all the studied species. Dichloromethane and methanol were the most efficient solvents, while E. sonchifolia was the most sensitive species. The dry residues of bracken reduced germination by 18 - 44% of all the weeds, as well as root length of Bidens pilosa (-30%) and Brachiaria decumbens (-82%). The phytochemical analysis showed the presence of flavonoids, tannins, and polyphenols in the extracts. These results suggest that P. aquilinum can be a good alternative for the biocontrol of the weeds under study and provide knowledge for the development of bioherbicides.
           Lentinula edodes AND Pleurotus ostreatus IN A COMPOST BASED ON SUGARCANE

    • Abstract: ABSTRACT Spent mushroom substrate of different edible mushrooms is a nutrient-rich biomass associated with mycelial metabolic activity in the growth substrate. The objective of this study was to evaluate the changes in the nutritional content and physical properties of a sugarcane bagasse substrate after the cultivation of the edible mushrooms Pleurotus ostreatus and Lentinula edodes. Strains of both species were first propagated in potato dextrose agar culture medium, then in wheat grains, and finally inoculated in sterile sugarcane bagasse. Determinations of macronutrients, pH and C: N ratio were carried out at 0, 30 and 60 days after mushroom mycelium growth in the bagasse-based substrate. After 30 and 60 days of inoculation, nitrogen (N), phosphorous (P) and potassium (K) recorded increases of 0.26%, 0.06% and 0.14 with Pleurotus ostreatus, and increases of 0.33%, 0.05%, and 0.11% with Lentinula edodes, respectively. Regarding micronutrients, there was an increase in Calcium (Ca) and Sulphur (S) in both substrates, but amounts varied during the time evaluated. Additionally, an important increase in hydrogen ion concentration was observed when both species were inoculated, with final values of 4.26 and 3.9 for Pleurotus ostreatus and Lentinula edodes species, respectively. In conclusion, this biomass presents a high percentage of the essential micro and macro elements required in a fertilizer.
  • WILD BARBERRY FRUIT (Berberís microphylla G. Forst.) AS A NATURAL

    • Abstract: ABSTRACT Barberry (Berberís microphylla) is a wild berry endemic to the Andean-Patagonian zone of Argentina and Chile. Even though it is not widely used or consumed, it has great potential for coloring and enrichment of different food matrices due to its high anthocyanin and antioxidant contents. The objective of this study was to evaluate the impact of barberry addition on quality parameters and stability of sour beer. Nutritional, physicochemical and sensory characteristics of the beer were analyzed. Firstly, different amounts of freeze-dried barberry were added to sour beer (0, 2.5, 5, and 10 g L-1) after primary fermentation. In the next experiment, beers brewed with 0 (control) and 5 g L-1 of barberry were stored at 5°C for up to 90 days and evaluated on a monthly basis. As demonstrated by the CIE Lab and Abs520nm parameters, barberry addition resulted in a marked color shift towards ruby red tones. It also increased TEAC and phenolic contents by 2-4 times, without affecting beer pH, acidity, or density. Furthermore, it had a positive impact on overall impression, appearance, aroma, flavor and balanced scores in a trained sensorial panel. Beer total anthocyanins varied between 30 and 100 mg D3G L-1. The beers brewed with barberry fruit presented stable antioxidant capacity, total anthocyanin content and both anthocyanin ionization and polymerization degree during storage. The results show that barberry can be used as an ingredient to make red and antioxidant-enriched sour beers with good stability during storage.

    • Abstract: RESUMEN Se realizó un ensayo con el objetivo de comparar colectores artificiales (papel hidrosensible y papel fotográfico Glossy) y dos programas informáticos (Gotas-PC y CIR1.5) para la valoración de una aplicación con diferentes diseños de boquillas (XR11002VP y TXA8002VK). Los parámetros evaluados fueron DV0,5, densidad de impactos de las gotas y eficiencia; este último se comparó como contraste de la determinación colorimétrica del trazador azul brillante. Se trabajó dentro de un galpón cerrado, bajo condiciones semicontroladas, sin viento y sobre terreno uniforme. La densidad de impactos no presentó diferencias entre colectores para el programa Gotas-PC, pero sí para CIR1.5. Al utilizar colectores hidrosensibles, la eficiencia es sobrestimada con el programa CIR1.5 y subestimada con Gotas-PC. Con colectores fotográficos, ambos programas subestiman, debido a que presentan improntas más pequeñas que arrojan valores de DV0,5 y eficiencia menor. En aplicaciones con población de gotas de menor tamaño, los porcentajes de eficiencia son similares con los dos programas. El programa CIR1.5 es más sensible al momento de analizar las gotas sobre ambos colectores y es capaz de distinguir mayor número de gotas y de menor tamaño.ABSTRACT A study was conducted in order to compare two types of artificial collectors (water-sensitive paper and photographic paper) using two software programs (Gotas-PC and CIR1.5) for the assessment of spray applications with two different nozzle types (XR11002VP and TXA8002VK). The evaluated parameters were DV0.5, droplet number density and efficiency, this was compared to the colometric determination with bright blue tracer. The trial was conducted inside a closed facility, under semi-controlled conditions, in absence of wind and on a uniform level ground. Droplet number density did not show significant differences between collectors using Gotas-PC, but differences were found with CIR1.5. For water-sensitive paper, efficiency is overestimated with CIR1.5 software but underestimated with Gotas-PC. However, both software programs underestimate with photographic paper according to the smaller imprints that result in lower values of DV0,5 and efficiency. In applications with smaller droplet population, efficiency is similar with both software programs. The CIR1.5 software is more sensitive for analyzing drops on both collector types and can distinguish a larger number of drops and smaller sizes.
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Tel: +00 44 (0)131 4513762

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