White mold (Sclerotinia stem rot) can be a serious disease after flowering in seasons with cool, moist growing conditions. Infection occurs when dropped petals contact the stem and spores germinate on the dead petals. Bleached stem lesions occur around the initial infection, then white mold and black fungal bodies grow inside and outside the stem. Sudden wilting and premature death of individual plants are usually the first noticeable symptoms. Since white mold is a problem in several other crops, its occurrence in canola must be carefully monitored. Planting canola following such crops as soybeans and dry edible beans or sunflower should be avoided.