Evaluation of the efficiency of alternative products to control downy mildew and anthracnose in grapevine, cultivar Niagara Branca | Avaliação da eficiência de produtos alternativos para o controle do míldio e da antracnose em videira, cultivar Niágara Branca

portugais. Com o objetivo de avaliar a eficiência de produtos alternativos para o controle das principais doenças fúngicas da videira, foi conduzido um experimento na Epagri/Estação Experimental de Urussanga – EEUR – noperíodo de setembro de 2004 a fevereiro de 2005. Em 24 parcelas, foram testados os seguintes tratamentos: Fitophos K®, Phosphorus K®, Ecolife-40®, calda bordalesa, extrato da alga Ulva fasciata e testemunha. Todos os tratamentos reduziram significativamente a severidade do míldio em relação à testemunha (24,7%), destacandose o extrato de U. fasciata, calda bordalesa e Ecolife-40®. As plantas tratadas com o extrato da alga exibiram menor incidência de frutos com antracnose (15%), comparadas às testemunhas (42,5%), mas não diferiram daquelas tratadas com Phosphorus K®, calda bordalesa e Fitophos K®.

anglais. The aim of this study was to evaluate the efficiency of alternative products to control downy mildewand anthracnose in grapevine. An experiment was carried out at Epagri/Urussanga Experiment Station, in Santa Catarina State, Brazil, from September 2004 to February 2005. The following treatments were tested: FitophosK®, Phosphorus K®, Ecolife-40®, Bordeaux mixture, extract of the alga Ulva fasciata and control. All treatments reduced leaf downy mildew severity compared to non-treated plants (24,7%). However, the highest diseasereduction was reached by spraying Ulva-extract, which did not differ significantly from both Bordeaux mixture and Ecolife-40® treatments. Plants treated with alga extract had lower anthracnose incidence in grape bunches(15%) than the control (42,5%), but did not differ from those treated with Phosphorus K®, Bordeaux mixture and Fitophos K®.