Pierce’s Ailment (PD) of grapevine (Vitis vinifera) is a result of the bacterium Xylella fastidiosa and is also vectored by xylem sap-sucking insects, Whilst Grapevine Red Blotch Virus (GRBV) results in Purple Blotch Sickness and is transmitted while in the laboratory by alfalfa leafhopper Spissistilus festinus. The importance of anthocyanin https://lyricsdemon.com/