Use of Petroleum Derived Spray Oils in Washington Grapevine Powdery Mildew Management Programs

Fig. 1. Effect of number of sequential oil applications on total soluble solids (TSS) in ‘Chardonnay’ berries at harvest in 2001 and 2002. Pooled data are shown because an F-test indicated that results from 2001 and 2002 were not significantly different.



Image from Plant Health Progress article:
Use of Petroleum Derived Spray Oils in Washington Grapevine Powdery Mildew Management Programs