Diseases

Common Onion Diseases

Click here to download the Seminis Onion Disease Guide.

Bacterial Soft Rot

Basal Plate Rot

Black Mold

Blue Mold Rot

Botrytis Bulb Rot

Dodder

Downy Mildew

Lesion Nematode

Neck Rot (PDF)

Onion Maggots (PDF)

Onion Rust

Pink Root

Powdery Mildew

Purple Blotch

Smudge

Yeast Soft Rot

Sour Skin

White Rot

Stem and Bulb Nematode

Stemphylium Leaf Blight

Sunscald