SPRAYING EXPERIMENTS AND APPLE DISEASES. IQ 



The most severe case of injury from Soluble Sulphur Com- 

 pound and arsenate of lead reported came from Winthrop : "I 

 used it to spray my apple orchard of about 3 acres on June 17, 

 1913. The varieties that were sprayed were Baldwin, Nod- 

 head, Roxbury Russet, Winthrop Greening, Rhode Island 

 Greening, Bellflower, Northern Spy and Canada Red. Half 

 of the foliage and a great many apples fell. I used one pound 

 of Soluble sulphur and 3 pounds of arsenate of lead to 50 

 galloins of water." 



Mr. Geo. A. Yeaton, County Director of farm demonstration 

 work for the University of Maine College of Agriculture in 

 Oxford County used the material in an experimental way in 

 soane of his demonstration work and reported variable results. 

 In one orchard the results were entirely satisfactory. In an- 

 other orchard of 248 trees the foliage of Spy and Ben Davis 

 trees was burned, while that on Baldwin and Mcintosh showed 

 no trace of it. Another orchard showed little or no burning. 

 State Horticulturist, A. K. Gardner, stated he had used Soluble 

 Sulphur Compound in a limited way and in each case there 

 was a limited amount of spray injury, probably 10 per cent 

 more than where the liquid (lime-sulphur) was used. "Other 

 men have claimed that it burned their foliage and a few have 

 said that it did not. The general consensus of opinion, how- 

 ever, has been that the liquid has proven more satisfactory." 

 Mr. Gardner also reported the case mentioned above where 

 the trees were drenched with the spray and did not sufifer 

 from any injury. 



All reports received by the writer regarding Soluble Sulphur 

 Compound as a dormant spray appear to be satisfactory. It is 

 claimed by some that the injurious action on the foliage re- 

 sults from arsenic set free when combined with arsenate of 

 lead. Doubtless this is the case, but no matter how efificient a 

 fungicide may be it is impracticable to use it as a summer spray 

 for apple trees unless some efficient insecticide may be combined 

 with it and the two used at the same time without danger of 

 leaf injury. 



