Abstract
The aim of this study is the monitoring of Bremia lactucae races in 2010, the major lettuce-producing regions of the State of Sao Paulo. The experiment will be conducted at UNESP-FCAV, in the Laboratory of Genetics and Breeding of Vegetable Crops, at Department of Plant Production. Will be collected isolates of B. lactucae, in the year 2010, the major lettuce-producing regions of the Stat…