Pierce’s Disorder (PD) of grapevine (Vitis vinifera) is attributable to the bacterium Xylella fastidiosa and is also vectored by xylem sap-sucking insects, Whilst Grapevine Pink Blotch Virus (GRBV) brings about Purple Blotch Ailment and is also transmitted in the laboratory by alfalfa leafhopper Spissistilus festinus. The importance of anthocyanin accumulations https://lyricsdemon.com/