THE GOOSEBERRY MILDEW 95 



Treatment. — Spray with a solution of potassium 

 sulphide (liver of sulphur) at the rate of one-half ounce 

 to one gallon of water. Begin as soon as the leaves 

 commence unfolding, and repeat the application at inter- 

 vals of eighteen to twenty days. The sulphide dissolves 

 more readily in hot than in cold water. This treatment 

 has proven entirely efficacious for a number of years at 

 the New York Experiment Station. Early in the sea- 

 son the Bordeaux mixture may he used instead of the 

 sulphide if more convenient. 



Literature. — An excellent article concerning this 

 disease, by Dr. B. D. Halsted, may be found in the 

 Eeport of the United States Department of Agriculture 

 for 1887 (pp. 373-380). It has also been discussed in 

 the reports and bulletins of the New York Experiment 

 Station, and in various books and papers on horticul- 

 tural topics. 



