58 BULLETIN 395, U. S. DEPARTMENT OF AGRICULTURE. 



authors, was 3.2 cents per tree. These writers state (p. 38) that for 

 these three treatments the cost will range from 3 to 5 cents per tree, 

 depending upon the labor conditions, the size of the trees, the con- 

 venience of the water supply, and the equipment used. While in 

 certain sections where labor is exceptionally expensive the cost may 

 somewhat exceed these figures, this estimate appears to be sound. 



Profit from Treatment. 



The profit from spraying appears in the increased amount, the 

 superior quality, the better keeping and carrying properties, and 

 the enhanced market value of merchantable fruit. Scott and Ayres 

 (1910, p. 19-20), working in Georgia, report that from Elbertas which 

 were sprayed four times the yield of merchantable fruit was ten times 

 that from similar unsprayed trees. By marketing tests they showed, 

 further, that the sprayed fruit from this block sold for 50 cents per 

 crate more than the fruit from the unsprayed trees. Scott and 

 Quaintance (1911, p. 31) report further shipping tests in which 

 sprayed Elbertas sold for 75 cents a crate more than similar unsprayed 

 fruit of the same variety shipped in the same car. Blake and Farley 

 (1911, p. 30) state that the profit secured by spraying at Vineland 

 during the season of 1910 was more than $1.50 per tree, while the 

 cost of applying the most expensive treatment did not exceed 5 

 cents per tree. In the experiments conducted by the writer at Cor- 

 nelia, Ga., in 1910 and reported in part by Scott and Quaintance 

 (1911, p. 23-26), 70 Elbertas (p. 24) which had received three appli- 

 cations of spray, as recommended later, yielded 97.04 per cent of 

 merchantable fruit, while on 70 parallel unsprayed trees only 54.11 

 per cent of the crop was merchantable. The yield of similarly treated 

 Smnmerours (p. 25) was 85 per cent merchantable, as compared 

 with 6.49 per cent from the similar unsprayed trees. An additional 

 application on this variety, as recommended later, would have been 

 necessary for a more thorough control of scab and rot. The actual 

 yields in merchantable fruit from 70 representative trees from each 

 of these plats were 113 bushels from sprayed Elbertas, 31.2 bushels 

 from imsprayed Elbertas, 115 bushels from sprayed Summerours, 

 and 3.5 bushels from unsprayed Summerours. 



The previously reported results obtained by the writer at ComeUa, 

 Ga., in 1912 show that even in a season when fungal and insect inju- 

 ries were less serious than usual, the standard spray treatments, as 

 recommended later, increased the percentage yield of salable sprayed 

 fruit, as compared with unsprayed,- 17.2 to 18.5 per cent in the case 

 of the Carman, 28.8 to 29.1 per cent in the case of the Elberta, and 

 6.5 per cent in the case of the Belle, which escaped disease in an 

 unusual degree. 



