| native venturia inopina sp. nov., specific to populus trichocarpa and its hybrids. | venturia populina, first described on european populus nigra, has been thought to be the only species of venturia in europe and north america to cause leaf and shoot blight of balsam poplars and cottonwoods in populus sects. tacamahaca and aigeiros. the species of venturia occurring on introduced p. nigra and native p. trichocarpa in the pacific northwest were examined. venturia populina was consistently found on p. nigra (i.e. the widespread p. nigra cv. 'italica') in the region, but v. inopina ... | 2003 | 12735251 |