210 
and vegetable life are so associated there is a more vigorous develop¬ 
ment and more early maturing of the fungus than under ordinary cir¬ 
cumstances. Let us hear from others on this interesting subject. 
TREATMENT OF APPLE SCAB. 
By B. T. Galloway and E. A. Southworth. 
In May of last spring arrangements were made with the experiment 
stations of Michigan and Wisconsin to carry on a series of experiments 
for the purpose of finding a remedy for Apple Scab (Fusicladium den- 
driticum , Fckl.). 
The fields of experiment were located at Lansing, Mich., on the Col¬ 
lege Farm, and at Ithaca, Richland County, Wis.; the work at the former 
place being under the direction of Professor Taft, Horticulturist of the 
College and Experiment Station, and at the latter under the general 
supervision of Professor E. S. Goff, Horticulturist of the Wisconsin Ex¬ 
periment Station, and in direct charge of Mr. A. L. Hatch, of Ithaca. 
The season was a favorable one, as the weather was wet enough to 
favor the growth of the fungus and thus offered a fair test of the rem¬ 
edies employed. 
The plan of work was drawn up at this Department and the same 
outline for the experiments was given to both. The instructions were 
very carefully carried out, and both experimenters have been unremit¬ 
ting in their diligence in making the applications and preserving ac¬ 
curate accounts of the results. 
The fungicides used were sulphide of potassium, hyposulphite of 
soda, a soluble sulphur powder prepared by Mr. E. Bean, Jacksonville, 
Fla., ammoniacal solution of copper carbonate, and modified eau celeste. 
Professor Goff, however, did not use the eau celeste. 
Both made seven applications; Professor Goff beginning May 18, 
and Professor Taft May 24, when the apples were about the size of peas 
and before any trace of scab was apparent. In regard to the time of 
beginning, Mr. Hatch says he is convinced that the applications should 
be started earlier, as he thinks fungus activity begins with the swelling 
of the buds. The varieties treated were the Northern Spy, by Profes¬ 
sor Taft, and the Fameuse, by Professor Goff; both selected because 
they had been particularly troubled by scab previous to the present 
year. 
With regard to the strength of the solutions employed, Professor Taft 
and Professor Goff both used the potassium sulphide in the proportions 
of one-half ounce to the gallon of water. The hyposulphite was used in 
both cases at the rate of 1 pound to 10 gallons. Professor Goff records 
some injury to the leaves from this strength, and on the fifth applica- 
