Pierce’s Disorder (PD) of grapevine (Vitis vinifera) is due to the bacterium Xylella fastidiosa and is particularly vectored by xylem sap-sucking insects, whereas Grapevine Purple Blotch Virus (GRBV) leads to Crimson Blotch Illness and is also transmitted from the laboratory by alfalfa leafhopper Spissistilus festinus. The importance of anthocyanin accumulations https://lyricsdemon.com/