Neck Rot (Onions)

Neck Rot


Description: This disease attacks living plants but is often

not noticed until onions are being held in storage.

Sunken, dried areas start appearing at the neck of the

bulb and gradually move down through the entire bulb.

Symptoms usually develop after bulbs have been in storage

for a month or more. The fungus penetrates leaf tissue,

but only affects the bulb. If necks are succulent at

harvest time, they provide an entry point for the fungus.

However, the fungus cannot attack a well-dried neck.

Solution: Do not

apply a nitrogen fertilizer after 8-9 weeks from seeding.

Space plants to allow for good air circulation. A regular

spraying schedule with Soap-Shield® Fungicidal Soap

will reduce infection. (Because of the continual emergence

of new leaves from the neck, timely and thorough spraying

will be required to keep new growth covered.)


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