Results 161 to 170 of about 26,834 (193)

Coffee Leaf Rust Detection Using Genetic Algorithm

2019 XV Workshop de Visão Computacional (WVC), 2019
In Brazil, most of the productive coffee plants is susceptible to rust, a severe disease caused by a pathogenic fungi which attacks the leaves of coffee plants, thus causing a drop in coffee production of up to 45%. To address this problem this paper proposes a genetic algorithm-based solution to identify rust in coffee leaves, thus contributing to a ...
Alexandre Pereira Marcos, Natan Luis Silva Rodovalho, Andre Ricardo Backes   +2 more
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The coffee leaf rust pandemic: An ever‐present danger to coffee production

Plant Pathology, 2023
Abstract Coffee leaf rust (CLR) is caused by the biotrophic pathogenic fungus Hemileia vastatrix . Despite being the most researched coffee disease, mysteries still exist relating to its epidemiology and biology.
Athina Koutouleas, David B. Collinge, Eric Boa   +2 more
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Weather-based coffee leaf rust apparent infection rate modeling

International Journal of Biometeorology, 2018
Brazil is the major coffee producer in the world, with 2 million hectares cropped, with 75% of this area with Coffea arabica and 25% with Coffea canephora. Coffee leaf rust (CLR) is one of the main diseases that cause yield losses by reducing healthy leaf area.
Fernando Dill Hinnah, Paulo Cesar Sentelhas, Carlos Alberto Alves Meira, Rodrigo Naves Paiva   +3 more
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Coffee Leaf Rust Detection Using Convolutional Neural Network

2019 XV Workshop de Visão Computacional (WVC), 2019
Rust is a severe disease affecting many productive coffee regions. It is caused by a pathogenic fungi that attacks the underside of coffee leaves and it is characterized by the presence of yellow-orange and powdery points. If not treated, rust can cause a drop in coffee production of up to 45%.
Alexandre Pereira Marcos, Natan Luis Silva Rodovalho, Andre R. Backes   +2 more
openaire   +1 more source

Sensitization to the fungus Hemileia vastatrix (coffee leaf rust)

Allergy, 2001
Background: The aim of the present study was to determine the existence of sensitization to the fungus Hemileia vastatrix (coffee leaf rust) in a sample of the Brazilian population. This fungus attacks coffee plantations, and in some regions of Brazil the concentration of its spores in the air can be very high.
M A, Croce , E R, da Costa Manso, W, Gambale, L, Takayama, C E, Oliveira Andrade, J H, Pereira Pinto, F F, Morato Castro, J, Croce   +7 more
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Incomplete Resistance to Coffee Leaf Rust

1983
Incomplete resistance to Hemileia vastatrix Berk. et Br. has been studied in Brazil under field, greenhouse, nursery and laboratory conditions. The following coffee populations were studied: breeding lines and cultivars of C. arabica, and c. canephora cultivars Kouillou, Icatu andCatimor.
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Control of coffee leaf rust in Kenya Colony

Transactions of the British Mycological Society, 1962
Results of twenty-seven trials sited at altitudes between 5000 and 6200 ft. in districts both east and west of the Rift Valley were all similar. The conclusions which can be drawn are: (1) maximum control of Hemileia vastatrix is obtained by treatments applied before commencement and during the early period of the rains; (2) timing of treatments is ...
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Ricoseius loxocheles, a phytoseiid mite that feeds on coffee leaf rust

Experimental and Applied Acarology, 2014
One of the most important diseases of coffee plants is the coffee leaf rust fungus Hemileia vastatrix Berkeley and Broome (Uredinales). It can cause 30 % yield loss in some varieties of Coffea arabica (L.). Besides fungus, the coffee plants are attacked by phytophagous mites.
Cleber M, Oliveira, João A M, Ferreira, Rafael M, Oliveira, Francisco O, Santos, Angelo, Pallini   +4 more
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Coffee leaf rust, Hemileia vastatrix, established in Brazil

1971
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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Bifurcation analysis in a coffee leaf rust epidemiological model

2022
Coffee is an important cash crop cultivated in the tropics, which sustains the livelihood ofnot less than 125 million people worldwide. However, coffee plantations are subject tovarious diseases, among which coffee leaf rust (CLR), caused by fungus Hemileia vastatrix,which infects coffee leaves and can severely reduce coffee berry production.We ...
Djuikem, Clotilde, Grognard, Frédéric, Touzeau, Suzanne   +2 more
openaire   +1 more source