■ New York Agricultural Experiment Station. 



427 



on the unsprayed plat at the rate of 40,650, weighing 12,860 

 pounds. Hence, the increase in number of fruits per acre due to 

 spraying was 30,450, and the increase in weight 12,405 pounds. 



The following table gives the number and weight of the fruits 

 gathered at each picking: 



Yield of Cucumbers from Sprayed and Unsprayed Plats. 



date. 



July 26 



August 2 



August 7 



August 11 

 August 16 

 August 20 

 August 24 

 August 27 

 August 31 

 September 4 

 September 8 

 September 10 

 September 14 

 September 18, 



Totals 



Spbayed. 



Number. 



16 



89 

 184 

 184 

 378 

 256 

 322 

 234 

 370 

 298 

 300 

 151 

 288 

 193 



3,263 



Weight. 



Lbs. 

 3.25 



22.25 



60.25 



60.50 

 139.75 



96 



99 



73 

 157 

 117 

 128 



38 

 105 



60 



1,159 



Unsprayed. 



Number. 



31 



112 



155 



158 



269 



220 



236 



124 



241 



108 



87 



43 



44 



38 



1,866 



Weight. 



Lbs. 



9.50 

 28.25 

 57.25 

 54 

 109.50 

 70.50 

 72 

 32 

 80 

 32 

 17 



8 

 11 



9 



590 



It is important to observe that in the first two pickings the 

 unsiprayed plants yielded more than the sprayed. This shows 

 that at the beginning of the experiment the unsprayed plants had 

 at least an equal chance with the sprayed, so that the differences 

 which appeared later may be justly attributed to the spraying. 

 Moreover, it shows that up to the close of July there was no 

 appreciable benefit from spraying, and this means that the six 

 applications made prior to July 15 were unnecessary-. Spray- 

 ing deterred the striped cucumber beetles but slightly and this 

 small benefit was counterbalanced by the injurious effect of the 



• 



Bordeaux mixture on the growth of the young plants. There 

 was no discoloration of the foliage such as occurs when the Bor- 

 deaux is improperly prepared, but the sprayed plants were some- 

 what smaller for a considerable length of time. All observations 

 go to show that spraying (on either early or late cucumbers) need 

 not be commenced until after July 15. The past season there 

 was scarcely a trace of anthracnose on cucumbers anywhere on 



