Oidium or powdery mildew of the vine . Fig. 13. Sublimed Sulfur of very good quality. Sulfur No. Fig. 14. Sublimed Sulfur of poor quality. Sulfur No. 4. U2 UNIVERSITY OF CALIFORNIA—EXPERIMENT STATION. «T it * **,. -^ * -? J-JHC ..mUtr Fig. 15. Ground Sulfur of good quality. Sulfur No. 16.

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Keywords: ., bookcentury1900, bookdecade1900, bookidoidiumorpowderym186biol