96 MAINE AGRICULTURAL EXPERIMENT STATION. I916. 



June 24. After that it progressed quite rapidly so that by July 

 7 from 75 to 90 per cent of the leaves were affected, witn 

 much yellowing and leaf drop showing at this time. On July 

 15 the ground was nearly covered with fallen leaves, and the 

 appearance of the trees showed a marked contrast with those on 

 adjoining plots, sprayed with other materials, which were cov- 

 ered with healthy foliage. 



The experiment was repeated the second year, reducing the 

 amount of the fungicide to three-fourths pound in 50 gallons. 

 The effects on the foliage were essentially the same as before. 

 No injurious effects were observed on the fruit. The results 

 of two successive trials indicate that even when used in small 

 quantities "Soluble sulphur" is an efficient fungicide for scab, 

 but at the dilutions tested it is unsafe for use as a summer 

 spray for apple foliage. Reports secured from several Maine 

 orchardists who used the material as a summer spray in 19 13 

 fully confirmed this conclusion. No attempt was made to test 

 its merits as a dormant spray. 



Another proprietary compound used is known as "Atomic 

 sulphur." This is sold in the form of a paste. It was used two 

 seasons at the rate of 7 pounds, plus the usual amount of arse- 

 nate of lead, diluted with 50 gallons of water.* No injury to 

 fruit or foliage was obtained. Scab control on the fruit and 

 the percentage of perfect apples was very nearly the same as 

 was secured with standard dilution lime-sulphur both seasons. 



*Through error due to following the directions of a local dealer 14 

 pounds of "Atomic sulphur" to 50 gallons was used for the first appli- 

 cation the first season. 



