Pierce’s condition (PD) of grapevine (Vitis vinifera) is due to the bacterium Xylella fastidiosa and it is vectored by xylem sap-sucking insects, Whilst Grapevine Red Blotch Virus (GRBV) brings about Red Blotch Disease and is particularly transmitted within the laboratory by alfalfa leafhopper Spissistilus festinus. The importance of anthocyanin accumulations https://lyricsdemon.com/