Rhizopus is not limited to fruit. It's a highly contagious fungus that can grow even in a refrigerator if food items are not kept covered. Initially the infection begins on one piece of fruit. The fruit quickly becomes covered in sporangia, which eventually rupture, releasing their spores into the air. Any uncovered food in the refrigerator is then vulnerable to contamination by the spores.
Green fruit has a better chance of survival since it is inherently more resistant to the disease.
This fungus can also infest many crops and cause root rot when there is a combination of too much soil moisture and damage from insect pests. The fungus grows throughout the plant, but ends up rotting the root. Not all of the food spoilage caused by this mold is bad. One species, Rhizopus oligosporous , has proven economically beneficial to many Asian countries. Added to cooked soybeans, it transform them into tempeh.