Sensitivity of Plasmopara viticola isolates to fungicides and relationship among environmental variables and progress of grape downy mildew in Niagara Rosada

• Grant number: 14/17328-1
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: September 01, 2014
• End date: May 31, 2015
• Field of knowledge: Agronomical Sciences - Agronomy - Plant Health
• Principal Investigator: Lilian Amorim
• Grantee: Taisi Bech Sorrini
• Host Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
• Associated research grant: 13/24003-9 - Grape diseases: epidemiology, damage assessment and control, AP.TEM

Abstract

Isolates of Plasmopara viticola, causal agent of gravepine downy mildew, will be collected in three regions of São Paulo State for determining in vitro its sensitivity to strobilurin fungicide. Relationships between environmental variables (temperature, leaf wetness duration, relative humidity, rainfall volume, rainfall intensity) and the progress of gravepine downy mildew (evaluations of disease incidence and severity) will be examined in areas where the damage caused by the disease will be evaluated.