Calico

Calico symptoms on potato appear as pale to bright yellow or blotching of leaves. Some strains cause severe stunting and necrosis of stems and tubers. Dry, corky areas or rusty brown patches develop within tubers.

• Reference: http://www.ipm.ucdavis.edu/PMG/r607101711.html

Presence among species

Pathogen	Susceptible Host
Alfalfa mosaic virus	Solanum tuberosum