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market-farming - Re: [Market-farming] sizing up brassicas

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  • From: "Bill Shoemaker" <wshoemak AT inil.com>
  • To: "Market Farming" <market-farming AT lists.ibiblio.org>
  • Subject: Re: [Market-farming] sizing up brassicas
  • Date: Wed, 9 Jul 2008 09:17:31 -0500

You might want to pull up a few plants to see if there are cabbage maggots feeding on the roots. In cool wet weather the adults can lay eggs at the base of plants. The maggots hatch out and crawl to the base of the plant and start feeding on the root system. the plant can't grow much because the roots aren't healthy. Sometimes you can even smell rotting tissue.
A pyrethrin spray at the base of the plants might help but if the damage is bad, it might be too late.

Bill Shoemaker, Sr Research Specialist, Food Crops
University of Illinois - St Charles Horticulture Research Center
www.nres.uiuc.edu/faculty/directory/shoemaker_wh.html



----- Original Message ----- From: "Ploughshare" <gjbrever AT midwestinfo.net>
To: <market-farming AT lists.ibiblio.org>
Sent: Wednesday, July 09, 2008 7:00 AM
Subject: [Market-farming] sizing up brassicas


I'm wondering why our brassicas aren't sizing up this year. The plants look
great.. they've been well taken care of, watered, etc. In addition, this
year it seems like it would have been a perfect one for brassicas... we had
a cool spring. I know it's difficult to diagnose, but wondering if there
are any nutrients that I may be missing that would affect the size of our
brocolli, cauliflower and even our kohlrabi heads this year?
PS--I planted onions in the field the year before. Do I remember reading
something about onions affect the size of brassicas or is it the other way
around?
--gary
Central MN


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