STUDY ON TWO VIRUSES ISOLATED FROM POPLAR

Leaves with systemic symptoms of ring or irregular spots or leaf scorch and deformation (PV-1) and rolling leaves with chlorosis deformation (PV-2),were collected from Beijing,Hunan and Henan province.The poplar viral sap can infect Nicotiana tobacum,N.glutinosa and other herbaceous plants.The observation on the morphology of the particles,serological reaction and symptom expressions of various hosts,(PV-1) and (PV-2) were considered to be CMV and TMV.The results of artificial inoculation of the two viruses to the poplar leaves showed that 12 clones of poplar were resistant;6 clones were susceptible and 2 clones were moderately susceptible.