Interação Clonostachys rosea, Silício e Botrytis cinerea em pepineiro

• Ano de defesa: 2012
• Autor(a) principal: Silva, Paula Renata Alves da
• Orientador(a): Maffia, Luiz Antônio
• Banca de defesa: Rodrigues, Fabrício de ávila , Carmo, Margarida Goréte Ferreira do
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado em Fitopatologia
• Departamento: Etiologia; Epidemiologia; Controle
• País: BR
• Palavras-chave em Português: Mofo cinzento; Controle biológico; Manejo
• Palavras-chave em Inglês: Gray mold; Biological control; Management
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOSSANIDADE::FITOPATOLOGIA
• Link de acesso: http://locus.ufv.br/handle/123456789/4421

Cucumber plants grown in greenhouse conditions are often infected by Botrytis cinerea, which causes the gray mold. The disease is controlled by successive applications of fungicides. In the perspective of integrated management of gray mold, we studied the effects of the interaction Clonostachys rosea, Silicon (Si) and Botrytis cinerea on disease severity. When Si and C. rosea were applied alone or together, the incubation period of disease was increased. When C. rosea was applied, the incubation period increased about 63h and gray mold severity and electrolyte leakage were significantly reduced. The application of either C. rosea or Si alone increased the activity of poliphenoloxidase, peroxidase, chitinase and β-1,3- glucanase, and reduce disease severity, area under the curve of progress of disease (AUCPD), and rate of gray mold progress. The application of just C. rosea was promoted plant growth, considering the dry mass of root system, stem length and dry mass of stems. The antagonist colonized endophytically cucumber plants; the frequency of colonization was higher in the inoculated with B. cinerea then in the uninoculated plants. We conclude that C. rosea is a potential biological control agent of cucumber gray mold that can be endophytic and can promote the growth of cucumber plants.