Late blight of potato

Host organism: Solanum tuberosum
Pathogen : Phytophthora infestan
Classification :
Kingdom: fungi
Phylum: Oomycota
Order: Peronosporales
Family: Peronosporaceae
Genus: Phytophthora
Species: P. infestans
Characters-
-It is a fungal disease.
-It affects leaves, stems and tubers.
-Water-soaked spots on leaves grow in size, turning purple brown and eventually black.
-White growth forms on the underside of leaves, spreading to petioles, rachis, and stems, and
often occurs at nodes.
-Stem breaks at certain points, topples over, and tubers show purplish brown spots and rusty
brown necrosis, spreading to the entire surface upon cutting.
Reference : practical botany[semester-1] by Satish Kumar