sentences:  By 1988, R. fragariae was isolated from more than 70% of plants from commercial strawberry fields in Connecticut in cultivation for more than one year.Under various names, fungi in the "Ceratobasidium cornigerum" complex are known to cause a range of diseases in commercial crops.The AG-A group ("Ceratobasidium ramicola") causes various diseases, including "strawberry black root rot", diseases of soya bean, pea, and pak choy, and "silky threadblight" of "Pittosporum" and other shrubs.