MICHIGAN STATE POMOLOGICAL SOCIETY. 481 



and act upon the principle that it is so." When trees are cer- 

 tainly affected with the Yellows, nnless we reserve them to try 

 the etfect of remedial nieasnreS, they should be destroyed, root 

 and branch, — not merely chopped down, bnt torn out by the 

 roots, and even then not left to act as possible centers of con- 

 tagion. Make them into firewood, and don't wait for the woo(^ 

 to season before burning it. 



As the ash elements are of prime necessity in the formation 

 of woody fibre, give each tree a liberal dose of unleached ashes, 

 — at least a peck to each tree. If the unleached ashes cannot 

 be obtained, use foiir times as much leached ashes. Leached 

 ashes are very valuable, for they still contain insoluble com- 

 pounds of potasli, which are slowly set free for the use of the 

 tree ; also all the pliosphate of lime contained in the original 

 ash, besides the carbonate of lime. 



If ashes cannot l)e obtained, some commercial salt of potash 

 may be employed. Crude saltpetre can be obtained at whole- 

 sale in New York for $7 per hundred pounds. A half-pound 

 of this dissolved in water and applied to each tree would have 

 a very marked influence in stimulating its growth. 



The chea^wst commercial salt of potash is the 8tassfurt salt 

 of Prussia. It contains from 23 to 30 per cent, of sulphate of 

 potash, and can be obtained in Baltimore at from $14.85 to- 

 $18.50 per ton. 



The woody growth of peach trees must be encouraged, even 

 at the expense of present fruitfulness, if we hope for healthy 

 trees. The ascertained deficiency of potash in the ashes of 

 diseased trees would point to this element as an important 

 means of securing healthy growth. 



If the trees show symptoms of the Yellows, the treatment 

 by drenching the roots with boiling water is easily applied, and 

 if the first treatment is not sufiicient, the dose may be fre- 

 quently repeated. It is done by drawing away the soil from 

 the root of the tree and pouring into the hole a pail of boiling 

 71 



