Citrus exocortis viroid

Citrus exocortis is a disease of citrus plants, caused by the Citrus exocortis viroid (CEVd). It can cause stunted growth and reduced yields in affected plants. The disease is also sometimes called 'scalybutt'. Citrus exocortis is a disease of citrus plants, caused by the Citrus exocortis viroid (CEVd). It can cause stunted growth and reduced yields in affected plants. The disease is also sometimes called 'scalybutt'. CEVd can also infect tomato plants. The resulting disease is sometimes called 'tomato bunchy top disease.' CEVd can be identified with bark shelling on trees grown on P. trifoliata or P. trifoliata hybrids. Other symptoms include leaf epinasty, stunting, and necrosis of the leaf midvein.