Symptoms of white mold on plants from an onion seed crop include stunting, leaf chlorosis and dieback, and soil adhering to mycelium of the pathogen, <em>Sclerotium cepivorum</em>, on the bulbs and necks.

Symptoms of white rot on plants from an onion seed crop include stunting, leaf chlorosis and dieback, and soil adhering to mycelium of the pathogen, Sclerotium cepivorum, on the bulbs and necks.

Photo Source: Lindsey du Toit, Washington State University.