rust
any of numerous destructive diseases of plants produced by fungi (order Uredinales) and characterized by usually reddish-brown pustular lesions
Barley leaf rust
plant disease caused by fungi of the species Puccinia hordei
downy mildew
name for several species of fungus
late blight of potato
type of blight that afflicts potato plants
White rust of chrysanthemum
plant disease caused by fungi of the species Puccinia horiana
Rust of sunflower
plant disease caused by fungi of the species Puccinia helianthi