Abstract Fungicide resistance is an alarming challenge for the Brazilian tropical agricultural systems, with major implications food safety, human and animal health, as well environment. This review explores strategies to address fungicide within agroecosystem context. We examined historical current scenarios of in agroecosystems approaches delay emergence mitigate selection resistant variants. Our indicates that prevalence field populations key plant pathogens Brazil was due failures...

One hundred and thirty cases of diarrhea 43 age-matched controls, 0 to 5 years old, were studied in a pediatric outpatient unit from poor peri urban area Porto Velho, Rondônia. Eighty percent diarrheal observed the groups under 2 age. Rotavirus (19.2%) was most frequent enteropathogen associated with diarrhea, followed by Shigella flexneri (6.15%) S. sonnei (1.5%) Salmonella sp. (6.9%). Four E. coli enterotoxigenic infections (3.1%), enteropathogenic (EPEC)(2.3%) one case enteroinvasive...

Abstract Wheat blast is one of the most important and devastating fungal diseases wheat in South America, South‐east Asia, now southern Africa. The disease can reduce grain yield by up to 70% best controlled using integrated management strategies. difficulty compounded lack durable host resistance ineffectiveness fungicide sprays. New succinate dehydrogenase inhibitor (SDHI) fungicides were recently introduced for diseases. Brazilian field populations pathogen Pyricularia oryzae Triticum...

The Sigatoka disease complex (SDC), caused by Mycosphaerella fijiensis (Mf) and M. musicola (Mm), comprises the most destructive fungal leaf streak spot diseases of commercial banana crops worldwide. In Brazil, site-specific succinate dehydrogenase inhibitor (SDHI) fungicides labeled for SDC management since 2014 present a high risk emergence resistance if deployed intensively solo. Our study determined levels sensitivity to boscalid fluxapyroxad in four populations pathogens sampled 2020...

Yellow and black Sigatoka, caused by Mycosphaerella fijiensis M. musicola, respectively, are the most important worldwide foliar diseases of bananas. Disease control is heavily dependent on intensive fungicide sprays, which increase selection pressure for resistance in pathogen populations. The primary objective this study was to assess level spread quinone-outside inhibitors (QoI—strobilurin) fungicides populations both pathogens sampled from banana fields under different spray regimes...

The incidence of Shigella spp. was assessed in 877 infants from the public hospital Rondônia (Western Amazon region, Brazil) where represents fourth cause diarrhea. Twenty-five isolates were identified: 18 flexneri, three sonnei, boydii and one dysenteriae. With exception S. dysenteriae, all isolated children with diarrhea acquired multiple antibiotic resistances. PCR detection ipa virulence genes invasion assays bloody fever (colitis) compared among 25 patients testing positive for...

Abstract Leaf blight, sheath and web blight are major diseases caused by Rhizoctonia species on both Fabaceae Poaceae plant hosts in the Brazilian Amazon agroecosystem. To determine diversity of associated with foliar fabaceous (cowpea soybean) poaceous (rice signal grass [ Urochloa brizantha ]) hosts, a broad survey was conducted Pará, Rondônia, Roraima, Mato Grosso, Amazon, from 2012 to 2013. We extended our Cerrado areas lowlands Paraíba Valley, São Paulo, where these have not been...

El contexto de la pandemia COVID-19 creó un escenario emergencia innovador en las escuelas, donde dio paso a educación remota. Hoy, se escucha mucho sobre clases síncronas y asíncronas línea como una medida este período cuando Organización Mundial Salud aconseja el aislamiento social. A que escuelas todo mundo hacen transición al aprendizaje durante pandemia, los estudiantes públicas regiones rurales no pueden mantenerse día con modelo enseñanza y, alternativamente, recibir materiales...

Evaluation of the use woundprotectant fungicides and biological control agents against stem canker (Neofusicoccum parvum) blueberry.Cien.Inv.Agr.40(3

Sugarcane dry rot emerged as an important stalk disorder in newly expanded plantations northwestern São Paulo, Brazil, under the current no-burning fully mechanical harvest policy gradually implemented past 20 years. This emergence was probably due to a considerable increase both pathogen inocula and insect pest populations sugarcane crop residues kept field. In this study, we surveyed incidence of three stalk-related disorders commercial fields six municipalities Paulo corresponding yield...

Objetivou-se com este trabalho avaliar o desempenho do método tanque classe "A" (TCA) e Hargreaves-Samani (HS), comparados ao de Penman-Monteith (PM), para determinação da evapotranspiração referência (ET0) no município Januária, MG.Foram utilizados os dados climáticos período 01 janeiro 2014 a 31 dezembro 2016, pertencente banco estação meteorológica INMET, localizada município.A partir dos obtidos foram realizadas análises correlação entre métodos TCA HS PM, regressão linear índices...

Widespread resistance to QoIs, DMI and SDHIs fungicides has been reported for Brazilian populations of the wheat blast pathogen Pyricularia oryzae Triticum lineage (PoTl). A pre-existing mechanism not associated with target site mutations indicated DMIs SDHIs, strong indication that PoTl multidrugresistance (MDR). Therefore, main objective this study was test hypothesis SDHI detected in due efflux pump mediated MDR mechanism(s) by characterizing sensitivity antifungal substrates. Four...

Objetivou-se, com este trabalho, avaliar o efeito de doses fósforo em cultivos sequeiro e irrigado, sobre a biomassa seca da parte aérea, conteúdo exportação nutrientes produtividade do algodoeiro. O experimento foi conduzido Neossolo Quartzarênico, na região Norte Minas Gerais. delineamento experimental blocos ao acaso quatro repetições, num arranjo fatorial duas P2O5 x dois sistemas cultivo. Dois tratamentos adicionais, sem aplicação cada sistema, completaram os seis estudados....

Biological control is considered the only viable integrated disease management practice for controlling widely distributed and destructive foliar blight sudden death caused by fungus Rhizoctonia solani AG-1 IA on signal grass (Urochloa brizantha) pastures. Since major varieties are highly susceptible fungicide sprays not labeled pasture cropping systems, biological sought as an alternative managing this fungal disease. In study, 24 fluorescent Pseudomonas isolates obtained from naturally...

O presente trabalho teve como objetivo determinar os efeitos da aplicação de K e Mg sobre o desenvolvimento vegetativo produtivo banana ‘Prata Anã’ (Musa spp.) irrigada com água alcalina oriunda aquífero subterrâneo. experimento foi conduzido no setor fruticultura do IFNMG-Campus Januária. Testaram-se as doses 5, 10, 15, 20 30 g/família ao mês sulfato magnésio; 20, 40, 60, 80 120 cloreto potássio combinadas pela matriz experimental Quadrado Duplo (incompleto); uma testemunha omissão...

Blast is one of the most significant wheat diseases, causing high yield losses in susceptible varieties under favorable conditions Latin America, Southeastern Asia and Eastern Africa. The disease caused by ascomycetous fungal pathogen Pyricularia oryzae Triticum lineage (PoTl). Chemical control with fungicides has been used as a management strategy; however, effectiveness major classes high-risk site-specific systemic reduced due to widespread prevalence resistance, especially Brazil....

The variability of the soil chemical attributes in an area where woody crops are integrated with forage is quite complex, so it important to understand distribution these and their correlation yield. This study aimed analyze spatial production bromatological composition Brachiaria Panicum species according when cultivated a silvopastoral system eucalyptus optimize yield nutritional quality this multiple-use system. was conducted municipality Ribas do Rio Pardo (MS) 2011/2012 crop season,...

A formação de um pomar econômico maracujazeiro amarelo depende do vigor das mudas, o qual é expresso com base no crescimento e estado nutricional plantas. O objetivo presente trabalho foi determinar mudas em resposta às ações individuais combinadas calagem, NPK micronutrientes, cujos tratamentos se sujeitaram ao delineamento blocos casualizados cinco repetições. As características avaliadas durante a condução experimento foram altura, diâmetro caulinar número folhas. Ao final,...

To reach soybean maximum yields, we should start from an appropriate cultivars choice according to the edaphoclimatic conditions of growing region. This study aimed evaluate agronomic aspects under irrigated in semiarid region Minas Gerais. The experiment was carried out at Instituto Federal do Norte de Gerais (Federal Institute Northern Gerais), Campus Januária. treatments consisted eight cultivars, M-SOY 9350, 8787 RR, 8352 CD 219 P98Y51, P98Y70, P99R01, P99R91. We adopted randomized block...

This study aimed at the development and validation of an accurate, more affordable, precise digital imaging resazurin-based fungicide sensitivity colorimetric assay (COL-assay) for fungal plant pathogens from genera Mycosphaerella Pyricularia. proposed was based on estimates resazurin reduction, which used as a metabolic indicator respiration activity microplate cultures. As model systems, we yellow black Sigatoka [Mycosphaerella musicola (Mm) M. fijiensis (Mf), respectively] wheat blast...

ABSTRACT Populations of the soybean leaf blight pathogen (Rhizoctonia solani AG-1 IA) are highly genetically differentiated along a latitudinal gradient in major growing regions Brazil. However, evolutionary processes leading to regional adaptation still unknown. The objective this study was evaluate relative importance neutral genetic variation and natural selection on divergence populations soybean-infecting R. IA. Therefore, we compared phenotypic differentiation quantitative traits (QST)...

Normalmente, as águas superficiais e das chuvas são insuficientes para atender às demandas dos produtores regionais no Norte de Minas Gerais. Assim, aqueles que possuem recursos hídricos subterrâneos satisfatórios vêm utilizando tal fonte necessidades hídricas frutíferas regionais. No entanto, essas comumente teores elevados carbonato bicarbonato cálcio, os quais promovem alterações nas características químicas solos, com elevação do pH Ca, após alguns anos cultivo, proporcionando...