ORCHARD SPRAYING EXPI;RIMi;nTS. 



43 



A very great superiority of lime-sulphur over bordeaux in 

 scab control is here shown on this one variety for that particu- 

 lar season. It is more valuable as an indication of lime-sulphur 

 efficiency per se than as an index of its superiority over bor- 

 deaux as a fungicide. 



In 1908, using both kinds of lime-sulphur sprays and bor- 

 deaux on the same block of trees, these^ results were obtained. 



Table j. 



Per cent. 

 Clean. 



Per cent. 

 Sligbtly 

 Scabby. 



Per cent. 



Badly 

 Scabbed. 



Per cent. 

 Spray 

 Injury. 



Unsprayed 



Self-boiled Lime-sulphur 

 2 applications 



Bordeaux 3-3-50, 2 appli- 

 cations 



Boiled Lime-sulphur 2 ap- 

 plications 



15.1 



50.0 

 55.9 

 69.6 



17.1 

 16.5 

 8.0 

 18.8 



67.1 

 88.8 

 35.9 

 11.3 





 



52.1 

 



Here again we find a greater efficiency in scab control of 

 boiled lime-sulphur over bordeaux. 



Especially noteworthy is the high per cent of spray injury 

 to fruit sprayed with bordeaux, and its entire absence on both 

 lime-sulphur plots. This immunity was not shared by the foli- 

 age. The same dilution used without any bad effects .in 1907 

 seriously injured the leaves in 1908. Cordley accounts for this 

 by the difference in climatic conditions in these seasons. He 

 would endow a greater resistance to injury to the foliage pro- 

 duced under the favorable conditions for growth that existed 

 in 1907. In 1908 a greater precipitation and lower tempera- 

 tures produced, according to his explanation, "a. growth which 

 was less vigorous, less hardy, more edematious and more sus- 

 ceptible to spray injury."** 



In 1907 and 1908 Cordley and Gate*** tested bordeaux and 

 concentrated lime-sulphur (home-boiled) on peaches for the 

 control of peach fruit spot. Bordeaux of 5-6-50 and 3-6-50 



* Cordley, A. B. "Lime-Sulphur Spray Preventive of Apple Scab." 

 Better Fruit, April, 1909, pp. 33-35. 

 **CordIey, loc. cit. p. 35. 

 ***Cordley, A. B. and Gate, C. C. loc. cit. 



