clubroot

clubroot disease of cabbages, turnips, radishes, and other plants belonging to the family Cruciferae ( mustard family). It is induced by a plasmodial slime mold that attacks the roots, causing, in the cabbage, undeveloped heads or a failure to head at all. Clubroot can be partially or in some cases completely controlled by the application of lime (if the soil is very acid), by rotation of crops, and by soil sterilization. The disease is also called finger-and-toe from the swollen shape it gives to roots. Plasmodial slime molds (phylum, or division, Myxomycota) are classified in the kingdom Protista .

clubroot(finger and toe) A serious disease of cruciferous (Cruciferae) plants, e.g. cabbages and broccoli. Symptoms include wilting of plants in bright sunshine, and the leaves may take on a bluish or reddish coloration. The roots show characteristic gall-like swellings. The disease is caused by the fungus Plasmodiophora brassicae. This organism can survive in the soil for many years, even in the absence of host plants.

clubroot (finger and toe) A serious disease of cruciferous (Cruciferae) plants, e.g. cabbages and broccoli. Symptoms include wilting of plants in bright sunshine, and the leaves may take on a bluish or reddish coloration. The roots show characteristic gall-like swellings. The disease is caused by the fungus Plasmodiophora brassicae. This organism can survive in the soil for many years, even in the absence of host plants.