Efeito De Fungicidas Triazóis Sobre O Controle Da Cercosporiose Em Mudas De Cafeeiro

Patrício, Flávia Rodrigues Alves; Braghini, Masako Toma

doi:10.1590/1808-1657v78p2412011

Cited by 4 publications

(1 citation statement)

References 7 publications

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“…Entre las estrategias de control de la roya, la aplicación de productos químicos de contacto y de acción sistémica es el método más utilizado, ya que ofrece una supresión rápida y rentable del hongo H. vastatrix. Los principales fungicidas de contacto son sales de cobre como el oxicloruro de cobre y los hidróxidos de cobre (Dos Santos et al, 2002;Hernández et al, 2021). Sin embargo, el uso indiscriminado de estas sales de cobre ocasiona la acumulación de cobre en aguas subterráneas, afectando procesos biogeoquímicos (Salam y Helmke, 1998;Salam et al, 2021).…”

Section: Introductionunclassified

Potencial fungicida del árbol de neem contra el hongo Hemileia vastatrix

Bravo-Ruiz

Sánchez-Velásquez

Alarcón-Gutiérrez

et al. 2022

UVserva

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El café es uno de los productos más comercializados en México y el mundo. En los últimos años, el mercado del café ha sufrido grandes mermas económicas debido a la presencia de la roya del cafeto, cuyo agente causal es el hongo Hemileia vastatrix. El uso de fungicidas es el método de control más utilizado. Sin embargo, todos estos contribuyen a la contaminación del medio ambiente y generan efectos adversos para el ser humano. Por lo anterior, es necesario encontrar alternativas para erradicar o paliar la incidencia de la roya del cafeto. Las semillas, hojas y corteza de Azadirachta indica se extrajeron con metanol y estos extractos fueron ensayados contra esporas de H. vastatrix, usando el ensayo de inhibición de la germinación. Para la purificación del extracto de la corteza se utilizaron diversas técnicas cromatográficas. Los resultados, indicaron que los extractos de semilla y corteza muestran una inhibición de la germinación por encima del 90%. Adicionalmente, se aislaron cuatro compuestos de A. indica, triricinoleína, estigmasterol, glucósido de estigmasterol y azadiractina A, que no se pudieron evaluar por la poca cantidad obtenida.

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Section: Introductionunclassified

Potencial fungicida del árbol de neem contra el hongo Hemileia vastatrix

Bravo-Ruiz

Sánchez-Velásquez

Alarcón-Gutiérrez

et al. 2022

UVserva

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Efficiency of green manures for Cercospora leaf spot management in coffee plants

Cardoso

Chaves

Fantin

et al. 2013

Trop. plant pathol.

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The use of Mucuna aterrima, Dolichos lab lab, Crotalaria mucronata, Arachis hypogaea, Mucuna deeringiana, C. spectabilis, and C. breviflora, intercropped with coffee plants, was evaluated as green manures in the management of Cercospora coffeicola under field conditions in Carlópolis and Jacarezinho counties in the state of Paraná in the crop seasons of 2008/2009 and 2009/2010. The main plot was comprised by treatments with green manures and urea, whereas subplots by the application or not of the poultry litter. There were two controls without green manure and urea: one with and another one without application of Beauveria bassiana, which was used to control Hypothenemus hampei. Similar founds were obtained at both municipalities. The percentage of diseased leaves (DL) was lower for most of the green manures and urea treatments. However, all the treatments reduced the DL in 2009/2010. Although A. hypogaea did not differ statistically from the controls in most of the experiments, the number of lesions per leaf was lower in the other treatments. Similarly, the percentage of healthy coffee berries was higher in the treatments than the controls in most of the experiments in both years. In general, there was no synergistic effect between green manures and urea with the poultry litter, and the efficiency of most green manures was similar to urea in the management of Cercospora leaf spot.

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Agronomic performance of coffee in response to framework pruning in cycles of the “safra zero”

Maia¹,

Tassone

Nadaleti

et al. 2020

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In this paper, we aimed at selecting genotypes of Coffea arabica L. that are responsive to framework pruning, with high productive potential and desirable agricultural features. We evaluated 18 progenies in the F 5 generation, 8 of them being from the group Catucaí (breeding of seedlings of Red Catuaí with coffee seeds of the Icatu germplasm) and ten descendants from the Timor Hybrid (breeding of the Red and Yellow Catuaí with the Timor Hybrid), as well as two commercial cultivars as control (Tupi IAC 1669-33 and Obatã IAC 1669-20). The experiment was carried out at the experimental field of the Federal University of Lavras. The coffee was pruned in August 2014 after the sixth crop and once again in August 2016, being two cycles in the "safra zero" system. The design used was in randomized blocks (RBD) with three repetitions and 20 treatments (18 progenies and two commercial cultivars) totaling 60 experimental plots. We evaluated the area under the progress curve of incidence and severity of leaf rust and cercosporiosis, the productivity (sacs ha-1), sieve #16 and over (%), mocha-type grains (%) and apparent specific mass of grains (tonm-3). The genotype 12 (H516-2-1-1-18-1-4) was responsive to the framework pruning and kept its productivity stable in both pruning cycles, being efficient in such system of crop conduction, besides presenting low incidence and severity of coffee leaf rust and cercosporiosis and high sieve.

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Efeito De Fungicidas Triazóis Sobre O Controle Da Cercosporiose Em Mudas De Cafeeiro

Cited by 4 publications

References 7 publications

Potencial fungicida del árbol de neem contra el hongo Hemileia vastatrix

Potencial fungicida del árbol de neem contra el hongo Hemileia vastatrix

Efficiency of green manures for Cercospora leaf spot management in coffee plants

Agronomic performance of coffee in response to framework pruning in cycles of the “safra zero”

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