EXPERIMENT STATION KKl'ORT. 415 



FUNGICIDES AND SPRAYING. 



The fungicides employed in the greenhouse during the past season 

 were kerosene emulsion and soap, and, at the Ex|X'rinieut Area, soda- 

 Bordeaux. 



The constituents of the emulsion were in the following proportions: 



Kerosene 2 pints. 



Hard soap j. 2 ounces. 



Water 8 gallons. 



This formula is the same as that frequently recommended as a 

 greenhouse insecticide, with the exception that it calls for twice the 

 quantity of water. To prepare, the requisite amount of "Ivory" soap 

 was dissolved in about one gallon of boiling water, and, after removing 

 from the fire, the kerosene was added. Drawing the solutions through 

 a knapsack pump is a very satisfactory method of combining them. 

 Ten minutes "pumping into itself" should produce a creamy mass 

 that will not separate. After adding the proper amount of water the 

 emulsion is ready for use. A considerable quantity of the concen- 

 trated emulsion may be set away in closed vessels and drawn out as 

 needed. 



The soap solution employed consisted of "Ivory" soap and water in 

 the proportions called for by the emulsion formula, nameh", two 

 ounces of soap to eight gallons of water. 



Kow Ajjplied. — For testing different strengths of kerosene emulsion 

 and soap upon- a few potted plants, an atomizer was used ; but for 

 treating the larger number of plants in the bench, a knapsack pump 

 was employed after the first two weeks. The atomizer is very conveni- 

 ent where only a pint or two is to l)e applied, but for larger amounts 

 the knapsack pump is much more satisfactory, it applying the solu- 

 tion more thoroughly and in a much shorter time. 



A — In the Greenhouse. — For testing the fungicidal valued of kero- 

 sene emulsion and soap in the Station greenhouse, mildewed plants of 

 Phlox Drummondii and the common verbena were employed, (^n Xo- 

 vember 8th mildewed seedlings of these were selectx^nl and transferred 

 from the Experiment Area to the coolest benches in the greenhouse. 

 They were disposed in twenty-one cross-rows, five plants to a row. 



The disease thrived under the new conditions, and by the end of 

 two weeks its presence upon the plants was very apparent. Spraying 



