Virulence of some selected isolates of Phytophthora palmivora in cacao. In: Theobroma v. 3 p. 12-16, 1973.

Abstract

The degree of virulence of 22 isolates of Phytophthora palmivora collected from nine different localities of the Cacao Growing Region of Bahia, Brazil, was assessed on four differential clones of Theobroma cacoo L. in order to group the isolates according to their levels of virulence. Results of lesion size produced in pods by different isolates showed significant differences between both isolates and clones and support the conclusion that the isolates highly differ in their degree of virulence.