Jose Mauricio Cunha Fernandes

Brazilian Agricultural Research Corporation (EMBRAPA) | Embrapa

The PDDB was created to serve as a reference for the development of methods for the automatic detection and recognition of plant diseases. All images were labeled by experienced plant pathologists, thus providing reliable data for training the developed algorithms. For full access to the complete image database, please follow: https://doi.org/10.48...

The debranning process, at an industrial scale, was applied to grains of two wheat cultivars to determine its effect on Fusarium mycotoxin content and antioxidant activity. Grain samples from the BRS Marcante and BRS Reponte wheat cultivars, naturally contaminated by Fusarium, were used in the study. The dry wheat samples were processed on the poli...

Originating in South America, wheat blast disease has spread to both Asia and Africa and is considered a significant threat to food security. Bangladesh experienced the first outbreak of wheat blast outside of the Americas in 2016. Shortly thereafter, the blast-resistant variety BARI Gom 33 was released. Seeds of this variety are however not as wid...

The debranning process, at an industrial scale, was applied to grains of two wheat cultivars to determine its effect on Fusarium mycotoxins content and antioxidant activity. Grain samples from the BRS Marcante and BRS Reponte wheat cultivars, naturally contaminated by Fusarium, were used in the study. The dry wheat samples were processed on the pol...

Wheat blast is a devastating disease caused by the fungal pathogen Magnaporthe oryzae pathotype Triticum that has spread to both neighbouring and distant countries following its emergence in Brazil in the 1980s. Under climate change conditions, wheat blast is predicted to spread primarily in tropical regions. Here we coupled a wheat crop simulation...

O trigo é uma das culturas agrícolas mais importantes. Isto é demonstrado pelo papel que o cereal possui na segurança alimentar e econômica dos inúmeros países produtores e consumidores de trigo. No Brasil isso não é diferente, e o país vem se destacando no avanço da fronteira do conhecimento, na ampliação da área de cultivo e no aumento da produti...

Background Disease suppressiveness of soils to fungal root pathogens is typically induced in the field by repeated infections of the host plant and concomitant changes in the taxonomic composition and functional traits of the rhizosphere microbiome. Here, we studied this remarkable phenomenon for Bipolaris sorokiniana in two wheat cultivars differi...

Os insetos possuem importante grau de colaboração para a manutenção do ecossistema no planeta. Porém ao atingir um determinado nível populacional e causar danos às plantas, alguns insetos, passam a ser considerados como insetos-pragas e representam uma ameaça para a agricultura. O afídeo ou pulgão, é um inseto que contém características para atingi...

Wheat blast, caused by the Pyricularia oryzae Triticum lineage (PoT), first emerged in Brazil and quickly spread to neighboring countries. Its recent appearance in Bangladesh and Zambia highlights a need to understand the disease's population biology and epidemiology so as to mitigate pandemic outbreaks. Current knowledge is mostly based on charact...

Wheat blast, caused by Pyricularia oryzae Triticum (PoT), is an emerging threat to global wheat production. Current understanding of the population biology of the pathogen and epidemiology of the disease has been based on phylogenomic studies that compared the wheat blast pathogen with isolates collected from grasses that were invasive to Brazilian...

Wheat blast, caused by Pyricularia oryzae Triticum (PoT), is an emergent threat to wheat production. Current understanding of the evolution and population biology of the pathogen and epidemiology of the disease has been based on phylogenomic studies that compared the wheat blast pathogen with isolates collected from grasses that were invasive to Br...

Wheat blast, caused by the Triticum lineage of Pyricularia oryzae (PoT), is a serious disease that first emerged in Brazil and quickly spread to neighboring countries. The recent appearance of this disease in Bangladesh and Zambia highlights a need to understand the population biology and epidemiology of the disease so as to mitigate pandemic outbr...

Wheat blast is a devastating fungal disease of wheat crops. The disease emerged in Brazil in the 1980s and is now spreading across continents, so it is urgent to calculate the potential for wheat blast spread and estimate the impact on wheat yield globally. By coupling a wheat crop simulation model with a new wheat blast model, quantitative estimat...

Com o advento da Internet das Coisas (IoT), diversas tecnologias de comunicação surgiram para possibilitar a trocade informações entre dispositivos. Com as mais diversas áreas de aplicação, a IoT está sendo usada no transporte, naindústria, na automação residencial, entre outras. Na agricultura, esse aporte também está presente devido a buscapor me...

The subtropical region of Brazil is home to 33% of the soybean [Glycine max (L.) Merr.] growing area and 90% of the wheat (Tritucum aestivum L.) growing area of this country. A soybean–wheat succession with fallow between crops is used in about 11% of the cultivated area. No study has quantified CO2 fluxes in annual soybean–wheat succession in this...

As an indicator of surface moisture, TVDI has great potential for application in agriculture in different types of climates, but the best results have been obtained in arid climates, given the presence of areas with contrasting water conditions. Some studies under subtropical climate conditions have shown good results in the use of TVDI as an indic...

The objective of this work was to evaluate the use of the surface moisture data generated by the temperature-vegetation dryness index (TVDI), obtained from sensors positioned on the surface of a soybean (Glycine max) agricultural field. The dry and wet limits of the index were obtained using Landsat-8 images covering the region around the crop. To...

Fusarium graminearum is the main cause of Fusarium head blight, a fungal disease that reduces yield and affects the quality of wheat and other small grains. Genetic resistance is the ideal method for disease control; however, there are not yet cultivars with sufficient resistance levels to withstand an epidemic. Genetic engineering strategies such...

Net primary productivity (NPP) can be used to quantify the relative role of climate and human activities in vegetation dynamics. Given its importance, many NPP estimation models have been developed, but some of the required data is still limited. Therefore, this study aimed to estimate the potential and actual NPP by testing different approaches re...

Wheat blast is caused by the fungus Pyricularia oryzae Triticum pathotype (PoT). Significantly damaging wheat blast epidemics are sporadic and limited to tropical wheat growing areas in South America. Unexpectedly, wheat blast was reported in Bangladesh and Zambia in 2016 and 2020, respectively. The urgent need to deal with a poorly studied disease...

RESUMO A queima bacteriana do alho causada por Pseudomonas marginalis pv. marginalis é a principal bacteriose foliar na cultura. Pouco se conhece sobre a epidemiologia dessa doença e para sua avaliação não existe uma escala ilustrativa que descreva o quantitativo de severidade nas folhas. Com base nisso, esse trabalho teve como objetivo elaborar e...

Aphids and yellow dwarf disease management in wheat are made based on insect population levels. As virus vectors, aphids cause damage even at low population levels. Effectiveness of the control depends on the insecticide management measures used, including application method, timing, and number of sprays. This work evaluated the effectiveness o...

Fusarium head blight (FHB) is a disease of wheat (Triticum aestivum L.) that causes major yield losses in South America, as well as many other wheat growing regions around the world. FHB results in low quality, contaminated grain due to the production of mycotoxins such as deoxynivalenol (DON). In Brazil, FHB outbreaks are increasing in frequency a...

Dynamic crop simulation models are tools that predict plant phenotype grown in specific environments for genotypes using genotype-specific parameters (GSPs), often referred to as “genetic coefficients.” These GSPs are estimated using phenotypic observations and may not represent “true” genetic information. Instead, estimating GSPs requires experime...

Dynamic crop simulation models are tools that predict plant phenotype grown in specific environments for genotypes using genotype-specific parameters (GSPs), often referred to as "genetic coefficients." These GSPs are estimated using phenotypic observations and may not represent "true" genetic information. Instead, estimating GSPs requires experime...

Highlights CSM-NWheat, a DSSAT wheat crop model, was coupled with a pest module named PEST. The coupled model can simulate the impact of pest and disease damage on wheat crops. Pest damage is expressed in daily steps by communication links called coupling points. Coupling points are linked with state variables at which pest damage can be applied. F...

Background: Wheat blast, caused by Magnaporthe oryzae Triticum (MoT) pathotype, is a global threat to wheat (Triticum aestivum L.) production. Few blast resistance (R) genes have been identified to date, therefore assessing potential sources of resistance in wheat is important. The Brazilian wheat cultivar BR 18-Terena is considered one of the bes...

• Rhopalosiphum padi (Linnaeus, 1758) is abundant and has a broad geographic distribution. It is one of the most important cereal pests. In Brazil, the economic losses associated with this aphid result mainly from the transmission of the barley yellow dwarf viruses. • Decision‐making for the adoption of management measures must consider the initial...

Aphids are insects that attack crops and cause damage directly, by consuming the sap of plants, and indirectly, by vectoring microorganisms that can cause diseases. Cereal crops are hosts for many aphid species, including Rhopalosiphum padi (an economically important aphid species). Recording and classifying aphids are necessary for evaluating and...

A soja é uma leguminosa de ciclo anual e de grande importância econômica no Rio Grande do Sul. Para essa cultura, estresses provocados por deficiência hídrica são responsáveis pela instabilidade no rendimento e na produção de grãos. Uma das formas de monitorar a deficiência hídrica é por meio do sensoriamento remoto, o qual vem sendo amplamente uti...

O objetivo deste trabalho foi verificar o desempenho do índice TVDI (Temperature- Vegetation Dryness Index), obtido a partir de sensores espectrais de superfície, e compará-lo a dados de déficit hídrico determinado pelo balanço hídrico meteorológico, em lavoura de soja no noroeste do Estado do Rio Grande do Sul. O princípio de funcionamento do TVDI...

O objetivo deste trabalho foi caracterizar e dimensionar as modificações, quantitativas e qualitativas, na radiação solar no topo da atmosfera ao atravessar a atmosfera terrestre em dias ensolarados e após interação com superfície cultivada com soja. Os dados foram provenientes de experimento desenvolvido em uma lavoura de soja, município de Carazi...

Aphids are insects that attack crops and cause damage directly, by consuming the sap of plants, and indirectly, by vectoring microorganisms that can cause diseases. Cereal crops are hosts for many aphid species, including Rhopalosiphum padi (an economically important aphid species). Recording and classifying aphids are necessary for evaluating and...

Computer vision and image processing procedures could obtain crop data frequently and precisely, such as vegetation indexes, and correlating them with other variables, like biomass and crop yield. This work presents the development of a computer vision system for high-throughput phenotyping, considering three solutions: an image capture software li...

The fungus Pyricularia sp., the causal agent of wheat blast, produces light, dry and hyaline conidia that can be removed from sporulating lesions by the wind and transported over long distances. Experiments were performed with the aim of (a) determining the relationship between the climate variables and the quantity of conidia of Pyricularia sp., a...

The DSSAT is a collection of computer programs and tools integrated into a single software package in order to facilitate the application of crop simulation models in research and decision making. The DSSAT Shell, an user interface program, enables users to easily select and use any of the DSSAT components. It reads text files, both input and outpu...

Supõe-se que a insensibilidade a fungicidas apresentada por algumas populações do agente causal da brusone do trigo, o fungo Pyricularia oryzae, seja um dos fatores que mais contribui para a baixa eficiência do controle químico desta doença no campo. O objetivo desse estudo foi comparar o controle da brusone em plântulas de trigo submetidas à inocu...

O desenvolvimento de cultivares de trigo resistentes à brusone, doença causada pelo fungo Pyricularia oryzae, tem sido prioritário para a maioria dos programas de melhoramento genético de trigo no Brasil. No entanto, apesar desse intenso trabalho desenvolvido por melhoristas, os triticultores brasileiros ainda não dispõem de cultivares de trigo com...

Wheat blast caused by Magnaporthe oryzae is a relatively new disease that has caused considerable losses in wheat fields of several South American countries, including Brazil. The sources of primary inoculum and survival from season to season of the fungus remain largely unknown. The objective of this study was to monitor the saprotrophic developme...

Abstract - Wheat blast caused by Magnaporthe oryzae is a relative new disease that has caused considerable damage on wheat fields of several South American countries such as Brazil, Bolivia and Paraguay. In temperate regions, inoculum overwinter is limited by low temperatures. However, the effects of not limiting low temperature conditions on the s...

A brusone do trigo causada pelo fungo Magnaporthe oryzae é uma doença relativamente nova que tem causado severos danos na produção de trigo em países da América do Sul, como Brasil, Bolívia e Paraguai e, mais recentemente, também na Ásia. Em regiões temperadas a sobrevivência do inóculo é limitada pelas baixas temperaturas. No entanto, em regiões o...

A brusone do trigo, causada pelo fungo Magnaporthe oryzae é hoje foco central dos programas de melhoramento de trigo, que buscam fontes de resistência para o desenvolvimento de cultivares com níveis adequados de resistência à doença. Esta demanda ocorre em virtude dos enormes danos que a brusone provoca nas lavouras de trigo. Em 2016, foi relatado...

Wheat blast, caused by the fungus Magnaporthe oryzae, represents a threat to wheat production in Brazil and other South American countries. The pathogen was first reported in Brazil infecting naturally wheat plants during the mid-1980s. In some years and locations, control of wheat blast has been difficult due to highly favorable weather conditions...

The search for data on climate change by researchers, government agencies or private companies is a recurrent demand. However, it is hampered by the means of access to this type of information, mainly due to the complexity of extracting, reformatting, and making this data available, which can exceed terabytes in size. The PROJETA platform aims to a...

The objective of this work was to evaluate eleven oat (Avena spp.) cultivars for the reaction to the blast caused by the fungus Pyricularia oryzae Cav., under controlled conditions, to identify promising cultivars for use in genetic breeding programs. Five cultivars of Avena sativa, four of A. strigosa and two of A. brevis were tested. The reaction...

Wheat blast caused by Magnaporthe oryzae is a relatively new disease that has caused considerable losses in wheat fields of several South American countries, including Brazil. The 2016 report of wheat blast occurrence in Bangladesh raised concern in South Asia where wheat represents a significant crop. The sources of primary inoculum and survival f...

Este artigo apresenta um pacote R desenvolvido com o objetivo de facilitar o acesso de dados de mudanças climáticas para a América do Sul gerados pelo CPTEC/INPE. São apresentados alguns trabalhos relacionados que foram utilizados como base no desenvolvimento do pacote. O pacote possui funções para acesso a dados climáticos e funções que auxiliam n...

Background and objectives Fusarium graminearum may reduce the wheat flour yield, technological quality and breadmaking performance. The objective was to evaluate the effect of breadmaking on the mycotoxin content in white and whole wheat breads to obtain information about the safety of wheat products. The wheat samples were contaminated via the add...

Over the last few years, considerable effort has been spent by Embrapa in the construction of a plant disease database representative enough for the development of effective methods for automatic plant disease detection and recognition. In October of 2016, this database, called PDDB, had 2326 images of 171 diseases and other disorders affecting 21...

The present work shows the application of transfer learning for a pre-trained deep neural network (DNN), using a small image dataset ($\approx$ 12,000) on a single workstation with enabled NVIDIA GPU card that takes up to 1 hour to complete the training task and archive an overall average accuracy of $94.7\%$. The DNN presents a $20\%$ score of mis...

A formação de geada pode ser prejudicial às culturas agrícolas que se desenvolvem durante o outono, inverno e primavera no Sul do Brasil. Por esta razão, o objetivo deste trabalho foi avaliar o perfil vertical de variação da temperatura do ar em lavoura de trigo em noites de ocorrência de geada. Para isso, foi instalada uma torre micrometeorológ...

Scenario analysis constitutes a useful approach to synthesize knowledge and derive hypotheses in the case of complex systems which are documented with mainly qualitative or very diverse information. In this article, a framework for scenario analysis is designed and then, applied to global wheat health within a timeframe from today to 2050. Scenario...

Wheat blast, caused by the fungus Magnaporthe oryzae Triticum pathotype (MoT), is a serious disease capable of causing severe losses, especially during warm and humid weather conditions. Although the pathogen attacks all aboveground parts, infection of the wheat spikes is of major concern. In this work we developed and evaluated a prediction model...

Wheat blast is a devastating disease that was first identified in Brazil and has subsequently spread to surrounding countries in South America. In May 2011, disease scouting in a University of Kentucky wheat trial plot in Princeton, KY identified a single plant with disease symptoms that differed from the Fusarium head blight that was present in su...

A produção de trigo no Brasil atende aproximadamente metade da necessidade do país, o que prejudica a balança comercial do agronegócio. Ao longo dos anos, diversas organizações vêm trabalhando para que isso seja alterado, com ações de pesquisa, desenvolvimento, transferência de tecnologia, políticas públicas, crédito rural, entre outros. Neste pano...

This paper presents the implementation of a leaf wetness detection system. Through the use of techniques for analysing and processing of digital images, we sought to identify and quantify the leaf wetness, as well as the leaf wetness duration. Moreover, a wireless sensor network was built to collect variables as temperature, relative humidity and p...

Brazil is the second-largest soybean producer. With the arrival of Asian soybean rust in the Western Hemisphere in 2001, a considerable amount of resources has been allocated to understand and control this important yield-limiting disease. Due its rapidly dissemination, in 2004, the federal government led an effort to create the Asian soybean rust...

Wheat blast, caused by the Triticum pathotype of Magnaporthe oryzae, is an emerging disease considered to be a limiting factor to wheat production in various countries. Given the importance of wheat blast as a high-consequence plant disease, weather-based infection models were used to estimate the probabilities of M. oryzae Triticum establishment a...

The effect of weather on plant diseases has been widely researched, and the ability to forecast meteorological events is able to offer valuable insights about the magnitude of an epidemic. In addition, better predictions of outbreaks that are more sensitive to fluctuations in weather can help in the establishmentA of more suitable control practices...

Among the most significant diseases affecting wheat worldwide, Fusarium head blight (FHB) has increased in concern to growers in many production regions. Apart from losses in yield and reductions in baking and seed quality, the major impact associates with FHB epidemics is the contamination of grain with mycotoxins. FHB has a worldwide distribution...

The control of tomato bacterial spot was carried out based on chemical spraying on a fixed schedule, without considering the progress of the disease. The spraying system based on a mathematical model can predict this progress and also reduce the number of sprays and maximize the disease control. Spraying regimes were established according to estima...

This research aims the development of a multiplatform application for use on mobile devices, seeking to offer farmers a quick access to weather information, as well as helping them make decisions about crop management through alerts of occurrence of pests and diseases in major crops. Given the diversity of operating systems on devices, Phonegap too...

Este artigo apresenta uma solução computacional para a coleta, armazenamento, fornecimento e visualização de dados meteorológicos. A base da solução está fundamentada no desenvolvimento de robôs, produzidos com a linguagem de programação R, os quais coletam em servidores, persistindo­os em um banco de dados. A fim de tornar os dados disponíveis par...

A cultura da beterraba tem se intensificado devido ao consumo in natura e também pelo processamento industrial de conservas. Na região do Alto Vale do Itajaí, SC, grande parte da sua produção vem de agricultores familiares que a usam em sucessão a cultura da cebola, com semeadura na primavera/verão. Entretanto, nesta época do ano a cercosporiose (C...