134 



PEACH LEAF CUKL: ITS NATURE AND TREATMENT. 



to advantage. The value of all the sprays used is shown, however, 

 by the gain in fruit obtained. The percentage of net gain in fruit 

 was 44, 116, 158, and 157 per cent, respectively. These figures show 

 that the eau celeste (Formula F) and the ammoniacal copper carbonate 

 (Formula G) gave satisfactory results. The action of the disease on 

 the foliage of the trees of experiment 3 was more severe than it was on 

 the foliage of the trees of experiment 4. The uusprayed trees of the 

 former experiment lost 10 per cent more of their leaves than the trees 

 of the latter. The percentage of gain in fruit from the sprayed trees 

 of experiment 3 was, however, fully as great as that from the sprayed 

 trees of experiment 4. This shows that the eau celeste (Formula F) 

 was more effective in combating the disease than the ammoniacal copper 

 carbonate, which was applied in experiment 4. 



Mr. F. N. Chesebro, of South Haven, sprayed 19 Crawfords Late 

 and 19 Oldmixon trees in the spring of 1894, leaving 19 trees of each 

 variety for comparison. The formula used was 15 pounds of sulphur. 

 30 pounds of lime, and 10 pounds of salt to 60 gallons of water. Mr. 

 Chesebro did not report the exact yield of his trees, but stated that 

 the sprayed trees lost 20 per cent of their foliage and the un.sprayed 

 trees 80 per cent— a saving of 60 per cent of the foliage by a single 

 spraying. His report is as follows: 



Table 38. — Experimental work conducted by Mr. F. N. Chesebro, of South Haven, Mich. , 



in the spring of 1894- 



[Variety of trees, Crawfords Late and Oldmixon Cling; nature of soil, sandy loam.] 



Mr. J. F. Taylor, of Douglas, Mich., reported favorably upon the 

 spray work conducted by him in 1894. He used three different sprays, 

 treating 50 trees with each, and leaving a like number unspra^ed 

 for comparison. The formuUe used were those designated as A, B, and 

 C, in the spray work of Mr. Smith Hawley. Mr. Taylor says, in regard 

 to his work: 



The blossom buds had swollen somewhat when I began spraying, but the leaf buds 

 were quite dormant. Formula A was used on March 29, Formula B on April 6, and 

 Formula C on April 20. Blossoms began to open on the last days of April, and by 

 the 6th of May trees were well covered with bloom. The trees sprayed were 6 years 



