15 
When the leaves are about one-third grown begin the treatment by 
spraying with the ammoniacal solution. In twelve days make a second 
application of this solution and continue at similar intervals until six 
or seven sprayings have been made. The applications are best made 
with the knapsack form of sprayer provided with the Eddy chamber 
nozzle. The spray of the Vermorel nozzle is too large for this work, 
but the Eddy chamber can be easily attached to the lance of the former 
at a cost of 75 cents. 
The total cost of such a treatment as outlined above need not exceed 
10 cents per L,000 trees. 
WHAT TO DO FOR PEACH YELLOWS. 
By Erwin F. Smith. 
A series of experiments with fertilizers was begun in 1889, and will 
be continued until complete and definite results are reached. These 
experiments are in twelve orchards in different localities and on a 
variety of soils, embracing a total of about 40 acres, with as many more 
for comparison. The results last year were not of such a nature as to 
warrant any affirmative conclusion or any general recommendation. 
For the present, at least, I can only indorse the Michigan practice, 
which is to dig out and destroy every affected tree as soon as it is dis¬ 
covered. 
In localities where this method has been practiced with some uni¬ 
formity they still grow peaches successfully. 
In the vicinity of Benton Harbor, Mich., where all the orchards 
were ruined between the years 1870 and 1880, there are now many 
fine young orchards, and the yellows has almost disappeared. In the 
summer of 1889, in company with Mr. Bufus H. Brunson, a former 
yellows commissioner, I visited many small orchards in different parts 
of the townships of Benton and St. Joseph, the former chief seat of the 
disease, and examined nearly 30,000 trees, finding only about fifty cases, 
nearly one-half of which were in one orchard. More than four-fifths of 
these trees were less than six years old. Many of the older ones, and 
most of those which I examined, were in fruit, and the earliest varieties 
were just coming into market, July 24. With a few exceptions, the only 
extensive orchards were young trees not yet in bearing, the earlier 
plantings having been numerous, but in a small and tentative way, no 
single individual caring to risk many thousand trees. Now, however, 
large orchards are being set. Whether the present immunity will con¬ 
tinue is a matter of great interest. If there is any real basis for the 
belief that the disease may be imported, it certainly will not, for many 
of the younger trees were procured from infected districts in the East. 
All fear of the disease seems to have died out, and with it most of the 
former vigilance. 
