A Study of Meadow-Crop Diseases in New York 



23 



TABLE 6. Effect of Elemental Sulfur on Conidial Germination of Macrosporium 



Sarcinaeforme 



with N/10 potassium sulfide in comparison with a check and Kolodust 

 was made. The results of this test are given in table 7. 



TABLE 7. Effect of Soluble Sulfur on Conidial Germination of Macrosporium 



Sarcinaeforme 



The table shows that soluble sulfur reduces the germination about 10 

 per cent. It appears then that the complete nontoxicity of elemental 

 sulfur shown in table 6 is due in part to its insolubility in the presence of 

 germinating spores rather than to the tolerance of the protoplasm to the 

 sulfur ions exhibited in table 7. 



Effect of copper. A large number of tests were performed with copper 

 dusts during the course of the experiments. In table 8 only the results 



