Author(s): ANGELOTTI, F.; BUFFARA, C. R. S.; TESSAMNN, D. J.; VIEIRA, R. A.; VIDA, J. B.

Summary: 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.

Publication year: 2014

Types of publication: Journal article

Unit: Embrapa Semi-arid Region

Keywords: Disease, Doença, Ferrugem da videira, Fungicida, Grapes, Phakopsora euvitis, Uva, Vitis Vinifera