196 MAINE AGRICULTURAL EXPERIMENT STATION. I915. 



the crop in the case of the latter, was very unfavorable to it. 

 The only conclusion which could be drawn from this single trial 

 is that under Maine climatic conditions it is not likely to prove 

 satisfactory when used on such tender foliage as that of the Ben 

 Davis variety of apples. 



After the first leaf injury was observed the fact was reported 

 to Doctor Reed who replied that a statement to the effect that 

 they did secure some spray injury on the Ben Davis in Virginia 

 should have been inserted in their bulletin, but through an over- 

 sight this was omitted. With them the injury was less than in 

 the case of bordeaux mixture and came largely from the earlier 

 sprayings. The fact should not be lost sight of, however, that 

 in different parts of the countr}^ under different climatic con- 

 ditions, the effects of a given spray on the foliage of fruit trees 

 may be quite different. 



Extra fine sulphur. \\'hile this material did not give as good 

 results as most of the others used it showed considerable effi- 

 ciency in scab control. The amount of russeting was, however, 

 relatively high, being nearly as much as that produced by the 

 stronger lime-sulphur when the latter was used throughout the 

 season. In connection with the use of fine sulphur flour in sus- 

 pension in water as a liquid spray mention should be made of 

 the results obtained in New York by Blodgett and later by 

 Reddick and Crosby with this material and with fine sulphur 

 and arsenate of lead as a dust spray for apple orchards.* The 

 figures presented by these writers show a material reduction of 

 scab where fine sulphur and arsenate of lead were used alone, 

 or combined with some inert substance used as a carrier or 

 diluent. 



*Blodgett, F. M. Experiments in the Dusting and Spraying of Apples. 

 Cornell Agl. Exp. Sta. Bui. 340. 1914. 



Reddick, Donald and Crosby, C. R. Further Experiments in the Dust- 

 ing and Spraying of Apples. Cornell Agl. Exp. Sta. Bui. 354. 1915. 



