Not all carrot diseases are obvious at first. Those affecting the top growth directly will be immediately apparent, but it can be very disheartening to see what looks like a healthy crop of carrots growing happily in the garden, and then dig them up and find the carrot root all riddled with tunnels.
"What's happened to my carrots?! And how could I have prevented it?"
Carrots can be affected by the following plant pests:
Unfortunately, there are no good organic
controls for these common carrot diseases, after the carrots are
affected. Prevention is the best medicine if you are an organic
For insect-borne diseases or insect pests, growing your carrots under Reemay will prevent insects from laying eggs or chomping down your carrots.
For fungal and bacterial diseases, removing the affected plants and practicing good crop rotation and garden hygiene for the following year are your best choices.
For non-organic controls, visit the Cornell Plant MD site.