INFECTIVITY OF ASTER-YELLOWS VIRUS PREPARATIONS AFTER DIFFERENTIAL CENTRIFUGATIONS OF EXTRACTS FROM VIRULIFEROUS LEAFHOPPERS.
D000818:Animals; D002498:Centrifugation; D006430:Hemiptera; D007303:Insect Vectors; D010942:Plant Viruses; D012106:Research; D014780:Viruses
EXPERIMENTAL LAB STUDY; INSECT VECTORS; PLANT VIRUSES