Crop diversity fruit trees and banana plants) are cloned. A single pest or disease could threaten a whole crop due to this uniformity ("genetic erosion"). A well-known historic case was the Irish Potato Famine of 1845-1847, where a vital crop with low diversity was destroyed by a single fungus. Another example is when a disease caused by a fungus affected the monocultured 1970 US corn crop, causing a loss of over one billion dollars in production. A danger to agriculture is wheat rust, a pathogenic fungus causing reddish patches, coloured by its spores. A virulent form of the wheat disease, stem rust,
Crop insurance composition of the crop, certain management practices of the grower, or both. However, many standard crop insurance policies do not differentiate between commodity crops and crops associated with particular attributes. Accordingly, farmers have a need for crop insurance to cover the risk of growing crops associated with particular attributes. In the United States, a subsidized multi-peril federal insurance program, administered by the Risk Management Agency, is available to most farmers. The program is authorized by the Federal Crop Insurance Act (which is actually title V of the Agricultural Adjustment Act of 1938, P.L. 75-430), as amended. Federal crop insurance is