Cauliflowers can also be prone to clubroot
disease, a fungal infection which attacks the plant through the soil via its root hairs.
The Canola/Flax Agri-Science Cluster and Clubroot
Risk Mitigation Project are part of the Canadian government's "Growing Forward" initiative, which will run from April 2010 until March 2013.
Cabbages and swedes were tested for clubroot
, which causes the roots to swell and burst, reducing crop yield.
Crop rotation is a must if clubroot
(which deforms the roots and prevents them from absorbing soil nutrients) and rhizoctonia disease (wirestem) are to be avoided.
The second reason is to control disease and infection, but in practice, diseases such as clubroot
in brassicas, can outlast a three-year rotation.
In addition, they will fumigate with new natural compounds to control Fusarium wilt on melons, root rot on strawberries, Phytophthora root rot on citrus, replant syndrome on apples, clubroot
on cabbage, and damping-off on vegetable crops.
This is particularly important for the greens (brassicas), which include radishes, turnips and swedes, because if they are grown in the same place year after year there is a high risk of getting clubroot
in the soil - and it can take many years to get rid of that.
Continue successional sowing of the brassicas in modules, moving on to small pots (8cm) and then to 15cm pots if you are cursed with clubroot
before planting out.
resistant variety of Brussels sprout called Crispus might be worth a try or you can test out the new hybrid between Brussels sprouts and kale called Brukale Petit Rosy.
If your cabbages have clubroot
, which causes leaves of infected plants to turn red or purple, remove affected plants and try growing cabbages elsewhere.
Avoid plants that have been allowed to dry out or have large swellings on the roots, as this could be clubroot
, a serious soil-borne disease.
Have seed companies really made progress in stopping blight, mildew, clubroot
and other devastating diseases?
Crop rotation prevents a build-up of pests and diseases in the soil, such as clubroot
in brassicas, eelworms in potatoes and tomatoes and root rots in peas and beans.
Other projects include a study to combat clubroot
, a disease which ruins plants such as turnips, brussels sprouts and oilseed rape and costs industry around pounds 30m a year in lost crops.
is best known as a disease of the brassica family, causing the plants to shrivel and weaken.