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