by Lodi Growers | Aug 22, 2013
LODI WINEGRAPE COMMISSION , 2007_July_G.pdf (0.6 MiB) - First Paragraph: Esca, also known as black measles, and Petri disease or young esca, are caused by a complex of fungal pathogens. Esca typically occurs in older grapevines and is caused primarily by...