Researchers are studying the use of "calcium formulations to deter Sclerotinia growth". Good examples are mitoviruses found in the two fungal species "Sclerotinia homoeocarpa" and "Ophiostoma novo-ulmi". The pathogenic fungus "Sclerotinia sclerotiorum" proliferates in moist and cool environments. White mold affects a wide range of hosts and causes sclerotinia stem rot. A geminivirus-related virus was found in "Sclerotinia sclerotiorum" conferring hypovirulence to its host. Sclerotinia trifoliorum is a plant pathogen infecting alfalfa, red clover and chickpea. Sclerotinia is a genus of fungi in the family Sclerotiniaceae. Other potato diseases include "Rhizoctonia", "Sclerotinia", black leg, powdery mildew, powdery scab and leafroll virus.