21. It will also cause yellows in sour cherry, especially when present with prunus necrotic ringspot virus. 22. The larvae feed on various trees and shrubs, but especially " Prunus " species. 23. In fact, beach plums ( Prunus maritima ) are not Jusd for jelly or for beach gardens. 24. Most of the fresh plums sold in North American supermarkets are " Prunus salicina " cultivars. 25. "Prunus americana " has often been planted outside its native range and sometimes escapes cultivation. 26. The fruit is similar to the commercial apricot " Prunus armeniaca ", and is edible. 27. It is grafted to " Prunus avium "'tree'rootstock, forming rounded top trees. 28. Wild and ornamental species of " Prunus " may also become infected by some strains of the virus. 29. The hardiness of " Prunus fruticosa " is a desirable quality in grafting and production of horticultural cultivars. 30. Its hybrid parentage is believed to be " Prunus spinosa " and " Prunus cerasifera ".
