Occurrence and host range of Olpidium brassicae in Central Brazil.
O. brassicae [CMI Map 430] was found for the 1st time infecting lettuce and crucifer plants in central Brazil. The lettuce and crucifer strs. differ greatly in their host ranges. Chrysanthemum maximum was the only known common host for both. This is the 1st record of the lettuce str. in Brazil.