Spraying Experiments in Nebraska 
5 
SPRAYING EXPERIMENTS IN NEBRASKA 
J. Ralph Cooper 
INTRODUCTION 
Spraying experiments were begun in Nebraska in 1906 by the 
Experiment Station in cooperation with the United States De- 
partment, of Agriculture. The results of the first year's work 
were published in Bulletin 98, ''Spraying Demonstrations in 
Nebraska Apple Orchards." In 1907 the Experiment Station 
continued the work alone and published the results in Bulletin 
106, ''Does It Pay to Spray Nebraska Apple Orchards?" In 
1908 the Experiment Station and the United States Department 
of Agriculture again conducted the work jointly, and in 1909 
and 1910 the Experiment Station continued the work alone. 
A report of this work was made in Bulletin 119, "Spraying as an 
Essential Part of Profitable Apple Orcharding." 
In 1913 work was begun on a much larger scale by the Ex- 
periment Station cooperating with the Extension Service in an 
attempt to demonstrate known methods and evolve new methods 
of practice from a commercial as well as an experimental stand- 
point and which would apply to the solution of spraying problems 
as they might arise from time to time.^ 
The more important questions which were considered during 
the three years covered by the present report were as follows: 
1. How many summer sprays are required and when should 
they be applied? 
2. What is the difference in efficiency between various brands 
of arsenate of lead? 
3. What are the relative values of lime sulphur and Bordeaux 
as fungicides for spraying apples? 
4. Is it possible to lessen or prevent Bordeaux injury and at 
the same time control fungous diseases? 
5. Is it possible to interchange Bordeaux and lime sulphur in 
a spray schedule in such a manner as to secure better results than 
by using either fungicide for the complete schedule? 
6. Is home boiled lime sulphur as efficient as the ordinary 
commercial brands of concentrated lime sulphur? 
7. Of what value are certain new fungicides and insecticides 
as summer sprays for apples? 
'The work was placed directly in charge of the writer, three-quarters of his salary being paid 
by the Experiment Station and one-quarter of his salary and all traveling expenses being paid by 
the Extension Service. The Extension Service also paid the salaries and traveling expenses of the 
assistants, while the Experiment Station furnished all materials not furnished by the orchard owners. 
