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Onion root maggots

Posted by foxglove_pa z6 PA (My Page) on
Thu, Jan 5, 06 at 8:01

Hello to the allium experts from a novice. I planted leeks in my garden plot at a communty garden last year and although they grew very well, most were infested with what I found out to be onion root maggots. I planted garlic this fall, (in a separate raised bed) and I'm concerned about the garlic getting infested. Anyone have any good non-chemical ways to deal with this pest? I've cleaned out the beds and left no infested leeks. However, since this is a community garden plot there are many beds around that I'm sure have not been cleaned and may contain onions (both wild and cultivated) that probably contain this pest. Since it's a fly as an adult it can travel a fair distance to infect new crops. Any help would be appreciated, as I'm planning to also grow leeks again this spring and would prefer them to be maggot-free!


Follow-Up Postings:

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RE: Onion root maggots

Root maggots of both alliums & brassicas are well controlled w/ beneficial nematodes. Application is usually when the soil hits 50F+ . I have found a 90%+ success rate and an application usually lasts 2 years.
Floating row covers are often recommended, but except for short term crops like radish or turnips I have not done well w/ them.


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RE: Onion root maggots

Thanks for the advice--I'll order some nematodes in my January seed order. I saw some in the catalog. Not sure if the row covers will be a practical solution for me--I'll see how the nematodes work out first I think.


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