Physiologic races of Phytophthora infestans in Peru. Investigations on the resistance of species, varieties, and hybrids of Potato to P. infestans in 1951

Bazan, D.Segura, Consuelo

Bol. Cent. Invest. agric, Lima 46: 1-14


Accession: 013790214

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Three physiologic races of Phytophthora infestans were recognized in Peru in 1951, one corresponding to race A, characterized by sparse mycelial growth, small sporangia, and minimum virulence; another to D, with normal mycelial development, sporangia of intermediate size, and moderate virulence; and the third to C, having abundant mycelium, the largest sporangia, and the greatest virulence.