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Onion Growing


 
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Matt Mc Girr
Rank attained: Hazel Tree
Rank attained: Hazel Tree


Joined: 20 Nov 2011
Posts: 2

PostPosted: Mon Mar 26, 2012 7:01 pm    Post subject: Onion Growing Reply with quote

I created a raised bed about 2 years ago , it 4 blocks high and 4 feet wide and 25 feet long and has at least 18 to 20 inches of good top soil in it.

I grow a variety of veg but for the past 2 years onions both ordinary and red and shallots have not kept for more than a month or 2 after lifting them in August.

They appear to start rotting from the neck down.

Can anyone give me a reason why this should occur

Regards

Matt
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Greengage
Rank attained: Chlorophyll for blood


Joined: 09 Nov 2011
Posts: 2749
Location: Kildare

PostPosted: Mon Mar 26, 2012 7:18 pm    Post subject: Reply with quote

Sounds like Onion neck rot whichis a disease of onions and shallots caused by the fungus Botrytis allii. Plants infected by the fungus usually appear perfectly healthy whilst the crop is growing. Symptoms are not usually seen on the bulbs until they have been in store for several weeks.
The following may help.
1.Ensure that seed or sets are obtained from a reputable company
2. Practice crop rotation, and don't grow onions for three years in soil where the disease has occurred
4.Avoid excessive use of nitrogen and late (i.e. after July) application of fertiliser
5.Water the crop regularly during dry spells.
There are no fungicides available to the amateur grower but some suppliers treat their bulbs to reduce infection.
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