42 Maine; agricultural, experiment station. 1911, 



Table i. 



Per cent Sound Fruit. 



Ben Davis. 



Givens. 



Lime-sulphur self-boiled 



Bordeaux 



Unsprayed 



90.96 to 92.72 



91.65 to 96.40 



9.50 to 19.08 



96.90 to 99.02 

 89.12 to 99.80 

 37.79 to 60.66 



Apple blotch on Ben Davis trees was satisfactorily controlled 

 with the self-boiled spray without leaf injury. The boiled 

 5-3-50 solution gave considerable leaf scorch and some defolia- 

 tion, but no injury followed the use of the self -boiled spray. 



Apple leaf-spot was held in check and peach brown rot and 

 peach scab were both well controlled by the self -boiled solution. 

 No data were taken on the control of apple leaf spot (Sphae- 

 ropsis maloriim, Pk.), but observations showed no infections 

 after applications were begun. No experiments in controlling 

 apple scab were made at this time. Concentrated lime-sulphur 

 at 1-25 did no injury to apples, but no effective strength was 

 found that was not harmful to peach trees. 



Cordley* was the first to record the favorable results of 

 using a concentrated boiled lime-sulphur. His first work was 

 with a stock solution of home preparation showing a specific 

 gravity of 1.27 (Beaume 31°) and an analysis of 2.38 pounds 

 of sulphur per gallon. This was used on apple, peach, pear, 

 plum, prune, quince, grape, potato and celery. The results 

 indicated that a dilution of 1-15 could be safely used on all of 

 these plants except the peach. His experiment on Yellow 

 Newtown apples for scab control yielded the following results. 



Table 2. 





Per cent. 

 Clean. 



Per cent. 

 Slightly 

 Scabby. 



Per cent. 



Badly 

 Scabbed. 



Per cent. 

 Spray 

 Injury. 



Unsprayed 



19.9 

 49.1 



79.3 



28.7 

 35.4 



15.3 



51.3 

 15.5 



5.3 







Bordeaux, 3 applications. 



Lime sulphur 3 applica- 

 tions 



31.9 

 



* Cordley, A. B. "Lime-Sulphur Spray to Prevent Apple Scab." 

 Better Fruit. Sept. 1908, p. 26. 



