398 



Bulletin 266. 



have been sprayed had not an unexpected break in machinery occurred 

 which could not be remedied until too late. From this rain infections 

 appeared on all the plats to a certain eiJCtent. But the spray of June 

 15th, preceding the continued rains of June 22nd, 23rd, 24th, gave 

 absolute protection against the infections which took place on these 

 dates, and which appeared on the berries just at noon on the three 

 days July 3rd, 4th and 5th, the period of incubation being just ten days 

 in each case. An extended and critical examination of the experimental 

 plats was made at this time. Only a single berry was found on sprayed 



Photo- Aug. 31, 1908 



Fig. 10 1. — View of a vine in Experimental Plat No. 4 from the windward side. 

 This shows the difficulty of attempting to spray with stationary nozzles. See photo- 

 graph of same vine ivith leaves stripped on opposite page 



plats which . had become infected. Unsprayed check rows showed a 

 quantity of Rot while the check plat and all the remainder of the vine- 

 yard showed Rot in very great quantities. 



When even a relatively small amount of Rot appeared in the sprayed 

 plats, it made future sprayings more imperative since opportunities for 

 infection were so much greater. By this time, too, physical conditions 

 made thorough spraying more difficult. A number of spurs with one bud 

 were left on each crown and these were not disbudded. As a result, 



