Powdery mildew weapons near 1993 First Paragraph: New registrations of fatty acid and an oil material on the horizon for California grape growers bring important additional weapons to the fight against powdery mildew in the vineyard. Burnham_Powdery_Mildew_1993.pdf File Size0.8 MiB DateJuly 12, 2013 Downloads879 AuthorT.J. Burnham