| cercosporella acroptili and cercosporella centaureicola sp. nov.--potential biological control agents of russian knapweed and yellow starthistle, respectively. | russian knapweed (acroptilon repens [l.] dc.) and yellow starthistle (centaurea solstitialis l.) are invasive weeds in the western united states, and both weeds are targeted for biological control. cercosporella acroptili (bremer) u. braun was identified as a possible biological control agent for a. repens, and a morphologically similar cercosporella sp. recently was found damaging to c. solstitialis in the field. because both fungi are potentially important for biological control of the respect ... | 2005 | 16596962 |