New York Agricultural Experiment Station. 425 



plants in each lot; and the same quantities of a two and one-half 

 per cent solution were used. This time, however, Lot I was 

 omitted. 



The dates of applying the salt solution in this experiment were 

 as follows: May 18, 28, June 11, 25, July 9, 23, August 7, 20, 

 September 3. 



All of the salted plants were again smaller than the unsalted 

 ones. On August 27 four average plants of each lot^ still in the 

 pots, were removed to the greenhouse. Up to this date no rust 

 had appeared, but on September 17, when the plants were next 

 examined, every one was found to be rusty. From this time on 

 the rust made rapid progress and became even worse on the 

 salted plants than on the unsalted. 



These experiments show that it is useless to try to prevent rust 

 by the use of salt solution, applied either to the soil or to the 

 foliage, and, also, that salt is not an aid to the growth of carna- 

 tions. 



IV. FURTHER EXPERIMENTS ON SPRAYING 



CUCUMBERS. 



Spraying Early Cucumbers. 



In the Long Island market gardens cucumbers are divided into 

 two classes^ — ^early cucumbers and late cucumbers. The former 

 are planted as soon as danger of frost is past in spring, and the 

 fruits, which are allowed to attain a length of from five to seven 

 inches, are sold in the city markets to be eaten fresh. Late 

 cucumbers are planted from June 25 to July 4, and the 

 fruits are gathered when they are from two and one-half to three 

 and one-half inches in length. They are used for pickling pur- 

 poses, and for the most part are sold directly to pickle manu- 

 facturers who have established salting houses at various points 

 in the farming districts. 



The spraying experiment reported in Bulletin No. 119 of this 

 Station was made on late cucumbers. In 1897 the following 

 experiment was made on early cucumbers. Eight rows of 25 hillB 

 each were planted early in May. The rows were five feet apart 

 and the hills four feet apart in the row. The variety was White 



