white rot

noun4

1. •
   A fungal decay of wood that consumes the darker-colored lignins, leaving the lighter-colored cellulose.
2. •
   A disease of grapes, first appearing in whitish pustules on the fruit, caused by the fungus Coniella diplodiella.
3. •
   Allium white rot, a disease of onions, garlic, and leeks, caused by fungi of species Sclerotium cepivorum.
4. •
   Any of several plants, including marsh pennywort (Hydrocotyle vulgaris) and butterwort (Pinguicula spp.), once believed to produce rot in sheep.