90 PEACH LEAF CUEL: ITS NATURE AND TREATMENT. 



The influence of the various .sprays on the thriftiness of the leaves 

 was especially examined. This examination was confined to such foliage 

 as was free from infection by the fungus, but was extended to sprayed 

 and unsprayed trees alike, and to all rows of the block. In recording 

 the comparative thrift of uninfected foliage, attention was given to the 

 depth of the green color, to the softness of texture, and to the size of 

 the leaves. These features of the foliage were considered collectively 

 and recorded on the scale of 100; for instance, the most thrifty foliage 

 was recorded at 100 per cent of thrift, and the less thrifty at a lower 

 percentage. This method enables one to distinguish at a glance those 

 sprays giving the best results in color, texture, and size of leaves — in 

 other words, in functional ability. The records for each row and 

 formula are given in the general table under the preceding head of this 

 chapter, to which the reader is referred. It will there be seen that the 

 trees of 5 rows produced foliage of the highest quality in spite of the 

 presence of disease. These rows were all sprayed with the copper 

 sprays, and all but one with Bordeaux mixture. Owing to the fact 

 that row 30, showing first-quality foliage, was an outside row, it 

 may be well to omit it in comparisons. The remaining 1 rows, Nos. 

 15, 41, 21, and 22, were all sprayed with Bordeaux mixture, containing 

 6 pounds, 5 pounds, 5 pounds, and 4 pounds of copper sulphate, 

 respectively. Smaller amounts of copper sulphate did not give equally 

 high results. 



The average results shown by the different classes of sprays are as 



follows: 



Per cent. 



Sulphur, lime, and salt (3 rows) ^7 



Sulphur and lime (7 rows) .' 63 



Bordeaux, sulphur, and lime combined (3 rows) 77 



Bordeaux (9 rows) 9f* 



Bordeaux, 4, 5, and 6 pound formuke (4 rows) 100 



Eau celeste (2 rows) 90 



Modified eau celeste (2 rows) 80 



Ammoniacal copper carbonate (2 rows) 70 



Iron sulphate and lime (1 row) 40 



Iron sulphate, sulphur, and lime (1 row) 40 



Potassium sulphide (1 row) 40 



Potassium sulphide and lime (2 rows) 45 



Lime and salt (1 row) 60 



Lime (1 row) 50 



Trees sprayed in 1894, but not in 1895 (3 rows) 20 



Control trees (19 rows) 20 ^ 



The Bordeaux mixture is here shown to give the best average results 

 as to thrift of foliage. The excellence of texture, color, and size of 

 the leaves on rows sprayed with the stronger Bordeaux mixtures 

 would be hard to surpass. 



^ First leaves probably injured by spray. 



2 One exceptional row, showing 40 per cent, omitted; perhaps benefited by wind- 

 borne spray. 



