This is especially important with plants purchased from other states, since new species or races of mummy berry might be introduced into NC as sclerotia in pots. Ag Chem Manual for specifics. Sanitation was the traditional means of controlling this disease for many years. While raking is no longer practical on a large commercial scale, growers can still reduce disease by disking to bury sclerotia and by clean cultivation. Burying mummies at depths of one inch or more will help to prevent germination.
All highbush cultivars appear to be susceptible to the mummy berry phase to some degree.
This means that growers in the piedmont of NC may be able to avoid mummy berry by planting only this species, as they typically do. Rabbiteye blueberries DO get fruit infections in Georgia and Mississippi, perhaps indicating the existence of another species or race of the mummy berry fungus in those areas.