Protective, curative and eradicative activities of fungicides against grapevine rust.

• Autor(a) principal: ANGELOTTI, F.
• Data de Publicação: 2014
• Outros Autores: BUFFARA, C. R. S., TESSAMNN, D. J., VIEIRA, R. A., VIDA, J. B.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
• Texto Completo: http://www.alice.cnptia.embrapa.br/alice/handle/doc/994987
• topic: Phakopsora euvitis; Ferrugem da videira; Disease; Uva; Doença; Fungicida; Vitis Vinifera; Grapes

The protective, eradicative and curative activities of the fungicides azoxystrobin, tebuconazole, pyraclostrobin+metiram, and ciproconazole against grapevine rust, were determined in greenhouse. To evaluate the protective activity, leaves of potted ´Niagara´ (Vitis labrusca) vines were artifi cially inoculated with an urediniospore suspension of Phakopsora euvitis four, eight or forteen days after fungicidal spray; and to evaluate the curative and eradicative activities, leaves were sprayed with fungicides two, four or eight days after inoculation. Disease severity was assessed 14 days after each inoculation. All tested fungicides present excellent preventive activity against grapevine rust; however, tebuconazole and ciproconazole provide better curative activity than azoxystrobin and pyraclostrobin+metiram. It was observed also that all tested fungicides signifi cantly reduced the germination of urediniospore produced on sprayed leaves.