148 



UNIVERSITY OF CALIFORNIA EXPERIMENT STATION. 



FIG 12i. Solonis x Cordifolia Rnpi-stris 2024. 



for its effect on the setting of 

 Sulfuring later, if needed, is a 

 well done. This is 

 true for the whole 

 of the two central 

 valleys and for 

 most of California, 

 except the coast 

 belt subject to sum- 

 mer ocean fog. 



Definition of a 

 Thorough and 

 Effective First Sul- 

 furing. The first 

 sulfur ing should be 

 made when the 

 shoots are between 

 6 and 15 inches 

 long. It should be 

 done in such a way 

 that every part of 

 every leaf of every 

 vine in all parts of 

 the vineyard re- 

 ceives some sulfur, 

 and the whole vine- 



The most common mistake 

 of those who have attempted 

 to follow the directions of the 

 bulletin has been a failure to 

 treat the vines thoroughly or 

 rapidly enough in the begin- 

 ning of the season. It can 

 not be too strongly urged that 

 the most effective way to con- 

 trol the mildew is by a thor- 

 ough and effective sulfuring 

 in the beginning of the season. 

 This alone will in most parts 

 of the State keep the vines 

 free, and the sulfuring during 

 the blossoming is needed only 



the fruit, and as an extra precaution. 



proof that the first two have not been 



FIG. 13. Aramon x Rupestris No. 1. One half natural size. 



