scholarly journals Effect of Center-Pivot Irrigation in the Rust and Brown Eye Spot of Coffee

Plant Disease ◽  
2014 ◽  
Vol 98 (7) ◽  
pp. 943-947 ◽  
Author(s):  
Adriano Augusto de Paiva Custódio ◽  
Edson Ampélio Pozza ◽  
Anselmo Augusto de Paiva Custódio ◽  
Paulo Estevão de Souza ◽  
Luiz Antônio Lima ◽  
...  
Keyword(s):  
Minas Gerais ◽  
Water Levels ◽  
Water Application ◽  
Hemileia Vastatrix ◽  
Irrigation Methods ◽  
Class A ◽  
Center Pivot ◽  
Cercospora Coffeicola ◽  
Evaporation Pan ◽  
Brown Eye Spot

Incidence of rust (caused by Hemileia vastatrix) and brown eye spot (caused by Cercospora coffeicola) of coffee was evaluated for 2 years in southern Minas Gerais, Brazil, in a center-pivot-irrigated coffee crop with different water application levels. Treatments consisted of six water levels of 0 (nonirrigated), 60, 80, 100, 120, and 140% applied according to class A evaporation pan (CAE). Progress of disease was influenced significantly by different water levels; the highest incidence of rust occurred with lower water levels—0 (nonirrigated), 60, and 80% CAE—whereas the lowest incidence was detected with larger water levels: 120 and 140% CAE. There was one peak of rust incidence in August. The highest incidence of brown eye spot occurred with water levels of 100 and 140% CAE and the lowest incidence was found in the nonirrigated treatment. Two incidence peaks occurred in March and June. This study identified that irrigation methods and water levels can decisively affect the epidemiological behavior of diseases and, therefore, their management.

scholarly journals Evolution and current scenario of irrigated area in Brazil: Systematic data analysis

2020 ◽  
Vol 24 (8) ◽  
pp. 505-511
Author(s):  
Daniel F. de Carvalho ◽  
Rosária da C. F. Martins ◽  
Jaqueline J. S. dos Santos ◽  
Gean C. Teles ◽  
Marcello A. D. Gentile ◽  
...  
Keyword(s):  
Sustainable Use ◽  
Essential Element ◽  
Sprinkler Irrigation ◽  
Minas Gerais ◽  
Study Data ◽  
Surface Irrigation ◽  
Irrigation Methods ◽  
Irrigated Area ◽  
Center Pivot ◽  
Current Scenario

ABSTRACT Water is an essential element to life and used in various human activities. However, because of the amount used in agriculture and the increase in irrigated area, the sustainable use of this resource has become a worldwide concern. In this study, data from the Censuses of Agriculture published by the Instituto Brasileiro de Geografia e Estatística (IBGE) from 1960 to 2017 were evaluated in relation to the regions and irrigation methods, performing a detailed analysis between the data from the 2006 and 2017 Censuses. There was an increase in irrigated area in Brazil in all geographic regions, reaching 6.9 million hectares in 2017. Sprinkler irrigation methods are the most used, with 48% of the irrigated area, followed by localized irrigation (24.4%) and surface irrigation (22.3%). Drip irrigation is the most used system in establishments up to 50 ha (617,423 ha), followed by conventional sprinkler (514,893 ha), while the center pivot stands out in areas larger than 50 ha (1,362,828 ha). The Southeast region (38.6%) and the states of Rio Grande do Sul (20.4%), Minas Gerais (16.6%) and São Paulo (16.0%) stand out as the ones with the largest irrigated area in the country. The State of Minas Gerais showed the highest growth of irrigated area in the 2006-2017 period (116.1%), due to the expansion of areas irrigated with center pivot.

The energy balance of a US Class A evaporation pan

2013 ◽  
Vol 182-183 ◽  
pp. 314-331 ◽  
Author(s):  
Wee Ho Lim ◽  
Michael L. Roderick ◽  
Michael T. Hobbins ◽  
Suan Chin Wong ◽  
Graham D. Farquhar
Keyword(s):  
Energy Balance ◽  
Class A ◽  
Evaporation Pan

Use of geographic information systems and remote sensing as automated tool for variable rate irrigation prescriptions

2019 ◽  
Author(s):  
◽  
Anh Thi Tuan Nguyen
Keyword(s):  
Remote Sensing ◽  
Real Time ◽  
Regression Models ◽  
Field Data ◽  
Irrigation Management ◽  
Irrigation Scheduling ◽  
Crop Growth ◽  
Variable Rate ◽  
Water Application ◽  
Center Pivot

[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Economic as well as water shortage pressure on agricultural use of water has placed added emphasis on efficient irrigation management. Center pivot technology has made great improvement with variable rate irrigation (VRI) technology to vary water application spatially and temporally to maximize the economic and environmental return. Proper management of VRI systems depends on correctly matching the pivot application to specific field temporal and areal conditions. There is need for a tool to accurately and inexpensively define dynamic management zones, to sense within-field variability in real time, and control variable rate water application so that producers are more willing to adopt and utilize the advantages of VRI systems. This study included tests of the center pivot system uniformity performance in 2014 at Delta Research Center in Portageville, MO. The goal of this research was to develop MOPivot software with an algorithm to determine unique management areas under center pivot systems based on system design and limitations. The MOPivot tool automates prescriptions for VRI center pivot based on non-uniform water needs while avoiding potential runoff and deep percolation. The software was validated for use in real-time irrigation management in 2018 for VRI control system of a Valley 8000 center pivot planted to corn. The water balance model was used to manage irrigation scheduling. Field data, together with soil moisture sensor measurement of soil water content, were used to develop the regression model of remote sensing-based crop coefficient (Kc). Remote sensing vegetation index in conjunction with GDD and crop growth stages in regression models showed high correlation with Kc. Validation of those regression models was done using Centralia, MO, field data in 2016. The MOPivot successfully created prescriptions to match system capacity of the management zone based on system limitations for center pivot management. Along with GIS data sources, MOPivot effectively provides readily available graphical prescription maps, which can be edited and directly uploaded to a center pivot control panel. The modeled Kc compared well with FAO Kc. By combining GDD and crop growth in the models, these models would account for local weather conditions and stage of crop during growing season as time index in estimating Kc. These models with Fraction of growth (FrG) and cumulative growing degree days (cGDD) had a higher coefficient of efficiency, higher Nash-Sutcliffe coefficient of efficiency and higher Willmott index of agreement. Future work should include improvement in the MOPivot software with different crops and aerial remote sensing imagery to generate dynamic prescriptions during the season to support irrigation scheduling for real-time monitoring of field conditions.

scholarly journals Cadastral maps of irrigated areas by center pivots in the State of Minas Gerais, using CBERS-2B/CCD satellite imaging

2011 ◽  
Vol 31 (4) ◽  
pp. 771-780 ◽  
Author(s):  
Elizabeth Ferreira ◽  
Joice H. de Toledo ◽  
Antonio A. A. Dantas ◽  
Rafael M. Pereira
Keyword(s):  
Satellite Images ◽  
Minas Gerais ◽  
The State ◽  
Irrigated Agriculture ◽  
Satellite Imaging ◽  
Cadastral Maps ◽  
Irrigated Area ◽  
Medium Resolution ◽  
Center Pivot ◽  
Other Information

Medium-resolution satellite images have been widely used for the identification and quantification of irrigated areas by center pivot. These areas, which present predominantly circular forms, can be easily identified by visual analyses of these images. In addition to identifying and quantifying areas irrigated by center pivot, other information that is associated to these areas is fundamental for producing cadastral maps. The goal of this work was to generate cadastral mapping of areas irrigated by center pivots in the State of Minas Gerais, Brazil, with the purpose of supplying information on irrigated agriculture. Using the satellite CBERS2B/CCD, images were used to identify and quantify irrigated areas and then associate these areas with a database containing information about: irrigated area, perimeter, municipality, path row, basin in which the pivot is located, and the date of image acquisition.3,781 center pivots systems were identified. The smallest area irrigated was 4.6 hectares and the largest one was 192.6 hectares. The total estimated value of irrigated area was 254,875 hectares. The largest number of center pivots appeared in the municipalities of Unaí and Paracatu, with 495 and 459 systems, respectively. Cadastral mapping is a very useful tool to assist and enhance information on irrigated agriculture in the State of Minas Gerais.

scholarly journals PHIALOMYCES MACROSPORUS REDUCES CERCOSPORA COFFEICOLA SURVIVAL ON SYMPTOMATIC COFFEE LEAVES

2019 ◽  
Vol 14 (1) ◽  
pp. 1
Author(s):  
Marie Caroline Ferreira Laborde ◽  
Deila Magna dos Santos Botelho ◽  
Gabriel Alfonso Alvarez Rodriguez ◽  
Mário Lúcio Vilela de Resende ◽  
Marisa Vieira de Queiroz ◽  
...  
Keyword(s):  
Plant Pathogens ◽  
Disease Rate ◽  
In Planta ◽  
Necrotrophic Pathogen ◽  
Initial Inoculum ◽  
Saprobe Fungi ◽  
Cercospora Coffeicola ◽  
Brown Eye Spot

<p>Saprobe fungi and necrotrophic pathogens share the same niche within crop stubble and the search for fungi non-pathogenic to plants that are able to displace the plant pathogens from its overwintering substrate contributes to the disease management. Brown eye spot (<em>Cercospora coffeicola</em>) is among the most important coffee diseases, it is caused by a necrotrophic pathogen that has decaying leaves as its major source of inoculum. We have screened saprobe fungi for the ability to reduce <em>C. coffeicola</em> sporulation and viability and determined the possible mechanisms involved in the observed biocontrol. A selected saprobe fungus, <em>Phialomyces macrosporus</em>, reduced the pathogen’s viability by 40% both <em>in vitro</em> and <em>in vivo</em>. The fungus acts through antibiosis and competition for nutrients. It produced both volatile and non-volatile compounds that inhibited <em>C. coffeicola</em> growth, sporulation, and viability. It also produced the tissue maceration enzyme (polygalacturonase), which reduces the pathogen both in detached leaves or in planta. The reduction in the fungal viability either by the saprobe fungus or its polygalacturonase-fraction supernatant resulted in the reduction of the disease rate. Therefore, <em>P. macrosporus </em>is a potential microbial agent that can be used in an integrated management of brown eye spot through the reduction of the initial inoculum of the pathogen that survives and builds up in infected leaves.</p><p> </p>

scholarly journals DIAGNÓSTICO DA APLICAÇÃO DE ÁGUAS RESIDUÁRIAS DA SUINOCULTURA NA CAFEICULTURA IRRIGADA II. AVALIAÇÃO DA UNIFORMIDADE DE APLICAÇÃO DE ÁGUA

Irriga ◽  
2006 ◽  
Vol 11 (3) ◽  
pp. 402-141
Author(s):  
Roberta Alessandra Bruschi Gonçalves ◽  
Everardo Chartuni Mantovani ◽  
Márcio Mota Ramos ◽  
Luiz Otávio Carvalho de Souza
Keyword(s):  
Irrigation System ◽  
Crop Productivity ◽  
Distribution Coefficients ◽  
Minas Gerais ◽  
Water Application ◽  
Coffee Plantations ◽  
Uniformity Coefficient ◽  
Filtration System ◽  
Irrigation Uniformity ◽  
Minas Gerais State

DIAGNÓSTICO DA APLICAÇÃO DE ÁGUAS RESIDUÁRIAS DA SUINOCULTURA NA CAFEICULTURA IRRIGADAII. AVALIAÇÃO DA UNIFORMIDADE DE APLICAÇÃO DE ÁGUA  Roberta Alessandra Bruschi Gonçalves; Everardo Chartuni Mantovani; Márcio Mota Ramos; Luiz Otávio Carvalho de SouzaDepartamento de Engenharia Agrícola, Universidade Federal de Viçosa , Viçosa-MG, [email protected]  1 RESUMO             A uniformidade de aplicação de água influencia diretamente a produtividade das culturas, que tende a aumentar com a uniformidade de irrigação. O objetivo deste trabalho foi determinar os coeficientes de uniformidade de distribuição de água residuária da suinocultura (ARS) em 6 propriedades cafeeiras, que aplicam ARS via sistema de irrigação, localizadas em 5 diferentes municípios da região de cerrado de Minas Gerais. Do total de sistemas avaliados, 50% apresentaram coeficientes de uniformidade de distribuição de água residuária (CUC/CUD) abaixo do recomendado. Os melhores resultados estão associados ao sistema de irrigação localizada por gotejamento, mostrando a viabilidade da utilização do mesmo, desde que haja manejo adequado ao longo de todo o processo de tratamento do efluente, inclusive no sistema de filtragem do equipamento. UNITERMOS: café, reuso, irrigação GONÇALVES, R. A. B.; MANTOVANI, E. C.; RAMOS, M. M.; SOUZA, L. O. C. de; ANALYSIS OF SWINE CULTURE WASTEWATER APPLICATION ON IRRIGATED COFFEE CROP  -  II. EVALUATION OF WATER APPLICATION UNIFORMITY  2 ABSTRACT            Water application uniformity influences crop productivity that is likely to increase with irrigation uniformity. The objective of this work was to determine the uniformity distribution coefficients of swine culture wastewater on coffee plantations (SCW); the analysis was carried out on 6 farms in the Minas Gerais State cerrado region that use SCW through their irrigation system. Half of the assessed systems presented water application uniformity coefficient below the recommended limit. The best results were associated to drop irrigation, showing the viability of this irrigation system use if there is an appropriate management throughout the entire treatment process, including equipment filtration system management. KEYWORDS: coffee, irrigation, reuse

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