Coffee Science

URI permanente desta comunidadehttps://thoth.dti.ufv.br/handle/123456789/3355

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2020 - 20213

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Assunto: search.filters.subject.Monitoring

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Agora exibindo 1 - 3 de 3
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    Best time and doses to associate chemical and biological control of the coffee berry borer in highland region, Brazil
    (Editora UFLA, 2021) Krohling, Cesar Abel; Fornazier, Maurício José; Mendonça, Pedro Luís Paulino de; Guarçoni, Rogério Carvalho; Martins, David dos Santos; Alixandre, Fabiano Tristão; Dias, Rodrigo da Silva; Rodrigues, Fernanda Latanze Mendes
    The coffee berry borer (CBB) Hypothenemus hampei (Ferrari) (Coleoptera: Curculionidae) causes significant damage to yield and quality of coffee beans. Cultural measures are important however, chemical and biological control must be adopted within an integrated CBB management system in order to prevent its damage mainly in larger areas. This study aimed to evaluate different doses and times of spray of the chemical insecticide metaflumizone and its association to the entomopathogenic fungus Beauveria bassiana as a tool to the management of CBB in Arabica coffee. The study was carried out in a high dense crop of Arabica coffee cultivar Catuaí Vermelho at 700 m altitude in the highlands of Espírito Santo state, Brazil. The experimental design used was randomized blocks with eleven treatments, four replications and plots of ten plants. Seven evaluations were carried out by sampling the berries in the upper, middle and two sides of the coffee trees. Metaflumizone at a total dose of 3.5 L ha-1 showed high performance for the control of CBB under field conditions in regions of high altitude. The association of metaflumizone with B. bassiana reduced a mean of 88.5% the infestation level of CBB in the post-harvested coffee beans and it can be used as one of the tools for the Integrated Management of CBB under field conditions. Beauveria bassiana can be associated with metaflumizone to control CBB as a complementary spray in March and at a dose of 2.0 kg ha-1 and should be also used in the Integrated Management of CBB. The monitoring of CBB population must be carried out and the first spraying with chemical or biological insecticide must be started at the recommended control level and in the transit season of CBB when flying adults are exposed.
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    Hypothenemus hampei ferrari (coleoptera: curculionidae) answer to visual and olfative stimuli in field
    (Editora UFLA, 2020) Souza, Rafael Assis de; Pratissoli, Dirceu; Araujo Junior, Luis Moreira de; Pinheiro, Julia de Assis; Souza, Jean Francisco Vimercati; Madalon, Fernando Zanotti; Deolindo, Francieli Destefani; Damascena, Alixelhe Pacheco
    The coffee berry borer (CBB), Hypothenemus hampei (Ferrari, 1867) (Coleoptera: Curculionidae: Scolytinae) is one of the main pests of world coffee growing. For the purpose of monitoring the presence of this insect, colored traps and attractives have been developed. Then, the objective of this work was to determine the association between trap colors and ethanol: methanol proportions in the CBB catch, and also to determine the infestation in the coffee plantation by the H. hampei. Painted traps of red, green and colorful (red upper half + green lower half) and six volatile mixtures were used. The reference mixtures consisted of ethanol: methanol (E:M), in the proportions of 1:1 and 1:3, with addition of 0.002 and 0.004 kg of pure caffeine powder. The infestation in the coffee plantation was determined by the H. hampei number count into the fruits and the traps. The insects caught number showed significant interaction between the factors color and mixtures of volatile compounds (F107:85 = 2.46; p < 0.05). The peaks of H. hampei infestation occurred in the stages of grain formation (January) and maturation (April). The red traps with attractive E:M 1:1 + Benzoic Acid had the most significant effects in the H. hampei catch.
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    The influence of natrural fermentation on coffee drink quality
    (Editora UFLA, 2020) Pereira, Leandro Ferreira Bernardes; Franco Junior, Kleso Silva; Barbosa, Camila Karen Reis
    Coffee quality refers to various methods used in farming, selective harvesting that assist in quality preservation and drying methods to be performed. Some drying methods that are being performed fermentation procedures have helped in obtaining specialty coffees. The objective of the research was to evaluate the effects of controlled natural fermentation of coffee through the temperature and time and its influence on the quality of coffee, according to the prescribed attributes in SCAA methodology, the type of coffee drink and time for drying grain. The research was carried out at Lavrinha farm, located at Poço Fundo (south of Minas Gerais), with coffee fruits of Catuaí Vermelho IAC 144 cultivar and selective and manual harvesting. The treatments with temperature-controlled fermentation of 30 and 40 °C (1, 2, 3, 6 and 12 hours) and the control treatment were used with three replications in a randomized block system (DBC) in a factorial scheme. After fermentation, the batches were dried to 11.5% humidity and evaluated according to the SCAA (2015) methodology. The natural fermentation induced by temperature (°C) and time (hours) directly influenced the drink quality, resulting in a coffee with a score of 82 to 84 points, with attribute aggregation and special classification. Natural fermentation with temperature up to 40 °C and time control of 3 ,1 and 24 hours resulted in an improvement in coffee quality by 84 points.