root in brassicas
HAVE club root in my vegetable garden. I applied lots of lime and
the pH is around 6.8-7.0. Do you know how I can get rid of it, preferably
club root gets into the soil it becomes almost impossible to grow
brassicas, like cabbage, broccoli and cauliflower. It causes the
roots to become stunted so the top growth doesn't develop properly.
The worst thing about it is the disease can remain in the soil for
up to 10 years, and that's only if there are no brassicas grown
in it over that time - including weeds belonging to the crucifer
family, such as wild turnip, wild radish and mustard, and related
You could try improving
drainage as much as possible as the disease symptoms are worse in
wet soil, and adding more lime to raise the pH to above 7.2. But
the best answer would be to find another spot in your garden in
which to grow your brassicas. There are fungicides, such as Greenguard,
which some gardeners dip their brassica plants in before planting,
which give some measure of control.
Gardener, Issue 194, 2005, Page 18
Reproduced with permission from the former Weekend Gardener magazine. The views expressed here are not necessarily those of the RNZIH.