Clubroot—Plasmodiophora brassicae
Clubroot is a problem on plants such as alyssum and nasturtium.
During initial stages of clubroot, aboveground symptoms may
be absent. Foliar symptoms include stunting, yellowing, and
wilting. Knobby,
spindlelike swellings on the roots may develop. Clubroot
is common in soils where Brassica spp.
plants have previously grown.
Solutions
Clubroot is most common in acid soils. Provide good drainage. Minimize the spread of the pathogen by using pathogen-free plants. Avoid planting plants where other infested plants in the mustard family have grown, such as broccoli and cabbage.
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Broccoli roots damaged by clubroot
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