A5090171939- Growth and nutrition in plants
- Coffee research and impacts
- Plant Pathogens and Fungal Diseases
- Banana Cultivation and Research
- Plant Pathogenic Bacteria Studies
- Nematode management and characterization studies
- Agricultural and Food Sciences
- Plant Pathogens and Resistance
- Plant Virus Research Studies
- Yeasts and Rust Fungi Studies
- Environmental and biological studies
- Plant Disease Management Techniques
- Plant pathogens and resistance mechanisms
- Soil Management and Crop Yield
- Fungal Plant Pathogen Control
- Cassava research and cyanide
- Cocoa and Sweet Potato Agronomy
- Forest ecology and management
- Phytoplasmas and Hemiptera pathogens
- Legume Nitrogen Fixing Symbiosis
- Conservation, Biodiversity, and Resource Management
- Plant-Microbe Interactions and Immunity
- Horticultural and Viticultural Research
- Pineapple and bromelain studies
- Silicon Effects in Agriculture
Universidade Federal de São Carlos
2015-2024
Universidade Federal do Espírito Santo
2007-2021
Universidade Estadual de Campinas (UNICAMP)
2016
Universidade de São Paulo
2003-2008
Fundo de Defesa da Citricultura
2004-2008
Universidade Federal de Viçosa
2003-2004
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...
Three field experiments were conducted in 1997, 1998, and 1999 to investigate the effects of angular leaf spot rust, separately or combined, on host growth yield individual bean plants (Phaseolus vulgaris). In each experiment, three treatments established by inoculating cv. Carioca with Phaeoisariopsis griseola, Uromyces appendiculatus, both pathogens. An additional control treatment was not inoculated, but sprayed a fungicide. 1997 experiments, reached higher disease levels than whereas...
Measurement of leaf area index (LAI) is important in studies plant growth. Based on this concept, the analysis crop growth has moved from classical to mechanistic models, via functional analysis. Leaf a major variable models and that attempt simulate loss caused by pathogens. A field experiment was carried out May through August 1998, using common bean ( Phaseolus vulgaris L. cv. Carioca), randomized complete block design with two methods LAI evaluation three replications. The objective...
Abstract Due to the lack of a standardized visual method for assessing bacterial blight ( P seudomonas syringae pv. garcae ) in coffee leaves, diagrammatic scale was developed and validated quantify disease. Leaves were collected crops nursery with different intensity symptoms, true severity determined electronically. Based on frequency distribution values according W eber– F echner's law stimulus, minimum maximum limits intermediate levels determined. Validation performed by ten evaluators...
Citrus Sudden Death (CSD), a new, graft-transmissible disease of sweet orange and mandarin trees grafted on Rangpur lime rootstock, was first seen in 1999 Brazil, where it is present the southern Triângulo Mineiro northwestern São Paulo State. The serious threat to citrus industry, as 85% 200 million State are lime. After showing general decline symptoms, affected suddenly collapse die, manner similar sour rootstock when by tristeza caused infection with virus (CTV). In tristeza-affected...
Wheat blast, caused by the ascomycetous fungus Pyricularia oryzae Triticum lineage (PoTl), is mainly controlled fungicide use, but resistance to main groups—sterol demethylase (DMI), quinone outside (QoI), and succinate dehydrogenase inhibitors (SDHI)—has been reported in Brazil. In order rationalize inputs (e.g., choice, timing, dose-rate, spray number, mixing/alternation) for managing wheat we describe a new monitoring tool, enabling quantitative measurement of pathogen’s inoculum levels...
As mudanças climáticas poderão alterar as doenças de plantas e afetar a eficácia das medidas manejo. Um dos prováveis impactos será na distribuição geográfica doenças. A Sigatoka Negra é considerada principal doença da cultura banana em decorrência danos causados aumento do custo O impacto sócio-econômico continua aumentando, uma vez que tem atingido novas áreas plantio, tornando o manejo mais difícil. Este trabalho por objetivos comparar meio elaboração mapas nas seguintes situações: a)...
The synthesis of a series 1,2,3-triazoles using glycerol as starting material is described. key step in the preparation these triazolic derivatives copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC), also known click reaction, between 4-(azidomethyl)-2,2-dimethyl-1,3-dioxolane (3) and different terminal alkynes. eight prepared were evaluated with regard to their fungicide, phytotoxic cytotoxic activities. fungicidal activity was assessed vitro against Colletotrichum gloeosporioides,...
A series of 19 novel eugenol derivatives containing a 1,2,3-triazole moiety was synthesized via two-step process, with the key step being copper(I)-catalyzed azide–alkyne cycloaddition reaction. The compounds were assessed for their antifungal activities against Colletotrichum gloeosporioides, causative agent papaya anthracnose. Triazoles 2k, 2m, 2l, and 2n, at 100 ppm, most effective, reducing mycelial growth by 88.3, 85.5, 82.4, 81.4%, respectively. Molecular docking calculations allowed...
Diseases in Eucalyptus plants can reduce forestry production. This study aimed to identify the causal agents of cankers urophylla trees two systems: a pure stand system (PSS) and an integrated crop-livestock-forest (ICLFS) with Urochloa brizantha. Diseased were sampled from trunks, stems, branches for fungal isolation. Data collected plots per (500 trees/plot) analyze disease dynamics, structure, spatial distribution along row directions. Isolates identified morphologically as Lasiodiplodia...
Azole-based fungicides are among the market's most widely used and effective agents. However, their indiscriminate use can lead to reduced efficacy increased pathogen resistance. This highlights need for novel that offer improved efficiency lower environmental impact controlling phytopathogenic fungi. In this study, a series of 20 thymol derivatives, incorporating 1,2,3-triazole moiety, were synthesized via three-step process, with key step being copper(I)-catalyzed azide-alkyne...
Escalas diagramáticas são importantes ferramentas na avaliação da severidade de doenças. Objetivando padronizar a estimativa do cancro cítrico em folhas citros (Citrus sinensis) causada por Xanthomonas axonopodis pv. citri, foram elaboradas quatro escalas diagramáticas, considerando ocorrência lesões isoladas pequenas (LP), médias (LM) e grandes (LG) associadas com o ataque larva minadora dos (LMC). Cada escala possui oito níveis porcentagens área foliar lesionada: 0,2 16% para LP; 0,6 25%...
The damage and the resistance levels of cultivars accessions common beans rescued in South mountain regions Espírito Santo State, Brazil, to M. incognita race 3 javanica parasitism were evaluated under a greenhouse. Four bean genotypes ("FORT-10", "FORT-13", "FORT-16" "FORT-19") 2 commercial cultivars: "Pérola", "Aporé", tested. cultivar "Rico-23" was included as standard susceptibility nematodes non-inoculated plants constituted control. Thus, experiment carried out completely randomized...
A morte súbita dos citros (MSC) é uma nova e destrutiva doença que afeta laranjeiras doces (Citrus sinensis) algumas tangerineiras (C. reticulata) enxertadas em limoeiro 'Cravo' limonia). Sua etiologia mecanismos de transmissão são ainda desconhecidos estudos epidemiológicos foram iniciados recentemente. Com o objetivo caracterizar a disseminação da MSC, foi empregada técnica análise dinâmica estrutura focos (ADEF) 166 mapas distribuição espacial plantas com sintomas provenientes 51 talhões...
The aim of this study was to evaluate the potential risk moniliasis occurrence and impacts climate change on disease in coming decades, should pathogen be introduced Brazil. To end, favorability maps were devised for moniliasis, both present future time. scenarios (A2 B2) focused decades 2020, 2050 2080. These obtained from six global models (GCMs) made available by third assessment report Intergovernmental Panel Climate Change (IPCC). Currently, there are large areas with favorable...