New York Agricultural Experiment Station. 361 



21. Plats I, III and V were, therefore, given a thorough 

 spraying on August 24 and 25. Quantity of Bordeaux mix- 

 ture used, 150 gallons. Time, 10 hours. The test rows were 

 again sprayed. 



September 2 and 3. ^SixtTi spraying. At this time the unsprayed 

 plants had no green leaves except a few at the ends of the 

 vines. The sjirayed plants, on Plats I, III and V were 

 considerablv diseased but continued to vield about 30 

 baskets of cucumbers every other day. They were again 

 spraj*ed with the l-to-8 formula. Bordeaux mixture used, 

 100 gallons. Time, 6 hours. Less Bordeaux was required 

 this time because there had been very little rain since the 

 last spraying. Time was saved by using two nozzles, in- 

 stead of one, as in all previous sprayings. The test rows 

 were again sprayed. 



September 8 and 9. Seventh spraying. Among the sprayed plants 

 the disease was slightly worse than on September 2; but, 

 in spite of this, two pickings had been made during the week, 

 the one made September 7 yielding 40 baskets of cucumbers. 

 The test rows on Plat IV, were now little better than the 

 unsprayed rows. Plats I. Ill and V, sprayed again (l-to-S 

 formula). Bordeaux mixture used, 100 gallons. Time. 6 

 hours. Two nozzles were used as in the sixth spraying. 



September 21. The vines were badly diseased but still retained 

 considerable of their foliag(^ As late as September 19, 

 eleven baskets of cucumbers were taken at one picking. 



September 23. Five baskets of cucumbers were picked on this 

 date. The vines were killed by frost during the night of 

 September 23-24. 



HOT^' THE SPRAYING WAS DONE. 



Thirty rows were sprayed seven times and two rows four times 

 with Bordeaux mixture made by the potassium ferro cyanide test 

 and applied with an Eclipse knapsack sprayer. Spraying was 

 begun July 13, when the plants had but two leaves, and con- 

 tinued, at intervals of from six to eleven days, until September 

 9. The remaining ten rows were not sprayed at all. 



