Symptom s

• Carrots may show little or no damage incidence in the field but following washing and storage white mold outbreaks often occur on the stored roots.
• Only a small percentage of the roots may be initially infected but the fungus mycelium can move very rapidly from carrot to carrot.
• In a matter of weeks the whole storage container may become a mass of white mold and black sclerotia surrounding each and every carrot.

Management

• Frequent inspection in storage, low temperatures, aeration and washing in a final water of 2-5 % diluted bleach solution may give adequate control (1 part bleach, (sodium hypochlorite) to 20 parts water.

Image Source:

http://www.apsnet.org/publications/imageresources/Pages/may_87-5-3.aspx