1. a disease of plants in the cabbage family caused by a fungus-like organism that produces swollen, club-shaped roots
Usage: botanical; plant pathology

Examples

• The farmer’s cabbage crop was devastated by clubroot.
• Clubroot is a serious problem for commercial brassica growers.
• The swollen roots caused by clubroot prevent proper nutrient uptake.
• Crop rotation can help prevent clubroot in vegetable gardens.
• Scientists are developing clubroot-resistant varieties of canola.
• The soil pH affects the severity of clubroot infections.