402 



Bulletin 266. 



after a rain. It is essential then that the spray be present at this time 

 to prevent their germination. The mixture should be applied just 

 before a period of rainy weather or as near this time as is practicable. 



THE WORK OF I908. 



Although it was felt that the above points were demonstrated beyond 

 question there were still many points unsolved and the work of 1908 

 was planned in view of solving these problems. Some of them may 

 be stated as follows: 



(a). To demonstrate that Black Rot can be controlled commercially 

 in a year most favorable to the development of the Rot. 



Photo. July II, 1908 



Fig. 104. — spraying outfit used in experimental work of 1908. Note the trailer 

 attachment for hand spraying. 



(b). To determine the minimum strength of mixture and the mini- 

 mum amount of spray necessary to do this. 



(c). To find out the value of cultivation in the control of the disease. 



(d). To determine the best time to apply the mixture in relation to 

 the blooming period of the grape and the weather conditions. 



In order to get the most serious attack of the Rot, whatever might 

 be the nature of the season, the worst vineyard in the vicinity, so far 

 as the Rot was concerned, was selected and a part of this, amounting 



