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URI permanente desta comunidadehttps://thoth.dti.ufv.br/handle/123456789/3352
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Resultados da Pesquisa
Item Natural Enemies and Competitors of Hypothenemus hampei (Ferrari) (Coleoptera: Scolytidae) in Colombi(Sociedade Entomológica do Brasil, 2002-10-01) Bustillo, Alex E.; Cárdenas, Reinaldo; Posada, Francisco J.O objetivo desta pesquisa foi levantar e registrar os inimigos naturais e competidores da broca-do-café, Hypothenemus hampei (Ferrari), na região cafeeira colombiana. Apesar da recente introdução da broca do café na Colômbia, foram registrados 25 inimigos naturais, incluindo o fungo Beauveria bassiana. Com exceção do fungo, os outros organismos são registros novos de inimigos naturais da broca-do-café, o que demonstra o pouco conhecimento existente sobre esses agentes de controle natural e sobre os competidores que podem contribuir para manter as populações da praga em equilíbrio. O grupo com maior número de inimigos naturais foi o dos predadores, seguido pelos competidores, fungos, bactérias e protozoários. Somente uma vespa parasitóide foi registrada atacando os adultos da broca-do-café.Item Growth promoting fungi increase the quality of Coffea canephora seedlings Pierre ex a. Froehner(Universidade Federal de Lavras, 2023-04-28) Alves, Jucélia Rodrigues; Celestino, Flávio Neves; Moraes, Alisson Gomes de; Reis, Ricardo Arizono dos; Grecco, Eduardo DomingosGrowth promoting fungi have shown an important role in the development of agricultural crops. Among these fungi, the genus Trichoderma stands out, and the entomopathogenic fungi of the genus Beauveria and Metarhizium have been gaining greater importance. Thus, the aim of the present study was to evaluate the vegetative growth of conilon coffee seedlings inoculated with growth promoting fungi. For the production of seedlings, cuttings of clone A1 of conilon coffee were used, in standard substrate. The growth promoting fungi Trichoderma harzianum, Beauveria bassiana and Metarhizium anisopliae were used at a concentration of 1 x 107 conidia.mL-1, inoculated via soil and leaf. Vegetative growth evaluations were performed at 180 days after cutting. The treatments corresponded to a 4 x 2 factorial arrangement, in a randomized block design, with three replications, totaling 24 plots. The data were submitted to analysis of variance and the means compared by the Scott-Knott grouping method (p ≤ 0.05). The treatments did not promote gains in plant height, stem diameter, root length, root fresh mass, leaf area, shoot/root fresh and dry mass of conilon coffee seedlings. Growth promoting fungi T. harzianum and B. bassiana promoted a greater number of leaf pairs, greater fresh mass of aerial part and greater dry mass of aerial part. Additionally, T. harzianum promoted greater root dry mass in conilon coffee seedlings. Only for the parameter number of leaf pairs, the inoculation via soil was greater than via leaf, while for the other parameters there was no difference regarding the inoculation method.Item 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 MendesThe 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.Item Ocorrência de Beauveria bassiana (Bals.) Vuill. em broca-do-café (Hypothenemus hampei, Ferrari) no estado de Rondônia, Brasil(Instituto Nacional de Pesquisas da Amazônia, 2002) Costa, José Nilton Medeiros; Silva, Rachel Barbosa da; Ribeiro, Paulina de Araújo; Garcia, AlvanirEm trabalho efetuado visando o levantamento de inimigos naturais da broca-do-café (Hypothenemus hampei, Ferrari) no estado de Rondônia, verificou-se a ocorrência do fungo Beauveria bassiana (Bals.) Vuill, conforme identificação da Embrapa Rondônia.Item Production of extracellular protease by a brazilian strain of Beauveria bassiana reactivated on coffee berry borer, Hypothenemus hampei(Instituto de Tecnologia do Paraná - Tecpar, 2007-03) Ito, Eliana Tiemi; Pereira, Geni Varéa-; Miyagui, Dalva Tomoe; Pinotti, Maria Helena Pimenta; Neves, Pedro Manoel Oliveira JaneiroStudies were carried out on extracellular protease production by Beauveria bassiana CG432 in liquid medium containing glucose and yeast extract. B. Bassiana presented active growth after lag period of 24 h., produced 80% of the total of the extracellular protease activity in 48 h which was maximum on the 5 th culture day. The extracellular protease presented optimum activity at 60 o C, was stable up to 1M Cl - , maintained the stability during 15 day at 4 o C and -18 o C, but was not stable if frozen repeatedly.