Coffee Science
URI permanente desta comunidadehttps://thoth.dti.ufv.br/handle/123456789/3355
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Resultados da Pesquisa
Item Selectivity of fluazifop-p-butyl in young coffee plants(Editora UFLA, 2019-07) Voltolini, Giovani Belutti; Castanheira, Dalyse Toledo; Menicucci Netto, Pedro; Alecrim, Ademilson de Oliveira; Rezende, Tiago Teruel; Guimarães, Rubens José; Gonçalves, Adenilson HenriqueWeed control is fundamental in coffee cultivation due to their big interference, competing with the crop for water, light and nutrients. Among the control methods used, chemical control is highlighted, as a function of its high efficiency and low cost. However, due to application failures, herbicide drift phytotoxicity is common. Aiming at the search for selective active ingredients in coffee plants, the objective in this study was to evaluate the selectivity of the active ingredient Fluazifop- p-butyl on the young coffee plants, and its effects on plant morphology, anatomy and physiology. The experiment was carried out in a greenhouse, with ‘Topázio MG 1190’ coffee plants (Coffea arabica L.), cultivated in pots with a capacity of 11 L substrate. The statistical design was randomized block design (RBD), with four replications and four doses of the herbicide, making up 16 experimental plots. Each plot consisted of three plants. The treatments were: 0%; 50%; 100% and 200% of the recommended commercial dose of the herbicide Fluazifop-p-butyl. The evaluations were performed at 120 days after application of the treatments. Morphological, physiological and anatomical characteristics were evaluated. Regardless of the evaluated characteristic, there was no difference between the doses of the herbicide. There were no visual phytotoxicity symptoms in the young coffee plants that received the herbicide Fluazifop-p-butyl. The growth of the coffee plants and the physiological and anatomical characteristics were not altered due to the application of the herbicide Fluazifop-p-butyl.Item Chemical control of Conyza canadensis (L.), in mixtures of herbicides with glyphosate in coffee crop(Editora UFLA, 2018-04) Silva, Carlos Alberto da; Miranda, Gustavo Rabelo Botrel; Alves, Alberto Donizete; Goulart, Roseli dos ReisThe plants invasion of Conyza genus has occurred in several regions in Brazil and in the world, due to the selection caused by the continuous use of herbicides with the same active, causing losses in production. This work aims to evaluate the association of herbicides in the control of C. canadensis. The trial was carried out on a farm, in MG, in a Mundo Novo coffee plantation, in a randomized block design (RBD), with 7 treatments and 4 replications, totalizing 28 plots. The treatments were composed by CTU (no application), Glyphosate 1440g i.a ha-1, Glyphosate 1440g i.a ha-1 + Ethyl Chlorimuron 25g i.a ha-1, Glyphosate 1440g i.a ha-1 + Methyl Metsulfuron 6g i.a ha-1, Glyphosate 1440g i.a ha-1 + Flumioxazine 100g i.a ha-1, Glyphosate 1440g i.a ha-1 + Ethyl Carfentrazone 32g i.a ha-1, Glyphosate 1440g i.a ha-1 + Saflufenacil 56g i.a ha-1. In all treatments, non-ionic Dash adjuvant was used in the proportion of 1% of the application volume. Ten evaluations were carried out using the scores criterion, where 1 means efficiency between 0 and 20%; 2 from 21 to 40%; 3 from 41 to 60%; 4 from 61 to 80%; 5 from 81 and 100%. It is concluded the treatment Glyphosate 1440g i.a ha-1 + Saflufenacil 56g i.a ha-1 presented superior results from the first evaluation, evolving until the conclusion of this experiment.Item Impacto do controle de plantas espontâneas sobre propágulos de FMAs e micorrização de cafeeiro(Editora UFLA, 2017-04) Melloni, Rogério; Silve, Emilienne Margueritte; Alvarenga, Maria Inês Nogueira; Melloni, Eliane Guimarães Pereira; Alcântara, Elifas Nunes deA manutenção de uma comunidade diversificada e ativa de fungos micorrízicos arbusculares (FMAs) em ecossistemas agrícolas é importante para a sustentabilidade de culturas como a do cafeeiro. Este trabalho teve como objetivo avaliar o efeito de técnicas de controle de plantas espontâneas, aplicadas na entrelinha do cafeeiro, sobre a ocorrência de propágulos de FMAs e, consequentemente, namicorrização desta cultura. Esta avaliação foi realizada em uma lavoura de café da Fazenda Experimental da Empresa de Pesquisa Agropecuária de Minas Gerais (Epamig), em São Sebastião do Paraíso (MG). As técnicas de controle de plantas espontâneas foram: 1) roçadora, 2) grade, 3) enxada rotativa, 4) herbicida de pré- emergência, 5) herbicida de pós-emergência, 6) capina manual e 7) controle sem capina. As variáveis analisadas foram: intensidade e porcentagem de colonização, comprimento de micélio ativo e total no solo, densidade e diversidade de esporos. Entre as técnicas de controle de plantas espontâneas nas entrelinhas de cafeeiro, a aplicação de roçadora, de grade e de capina manual foram as que mais favoreceram a manutenção dos propágulos de FMAs e a micorrização das plantas, contrariamente ao uso de herbicidas de pré-emergência.