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B. P..1.—459. 
LIME-SULPHUK MIXTURES FOR THE SUMMEK 
SPRAYING OF ORCHARDS: 
INTRODUCTION. 
During the summer of 1907 the Department of Agriculture con- 
ducted experiments in Arkansas and Missouri with self-boiled and 
unboiled lime-sulphur mixtures for the control of apple and peach 
diseases, the object being to develop, if possible, a fungicide that 
could be used on growing trees, particularly peach, without the injury 
commonly following applications of Bordeaux mixture. The results 
of these experiments, which were published in Circular 1, Bureau of 
Plant Industry, were so encouraging that more extensive experiments 
were planned for the following year. 
In 1908 experiments were conducted under the writer’s super- 
vision in Georgia, Arkansas, Nebraska, and Illinois, and in New 
Hampshire in cooperation with the New Hampshire Agricultural 
Experiment Station, using self-boiled, home-boiled, and factory- 
boiled or commercial lime-sulphur preparations, as well as some 
other possible fungicides. The work in Georgia was carried out by 
Mr. T. W. Ayres, and that in Arkansas by Mr. James B. Rorer. The 
writer personally looked after the work in Illinois and Nebraska, 
assisted at the latter point by Mr. George EK. Merrill. Dr. Charles 
Brooks conducted the New Hampshire work, the results of which are 
to be published by him in a forthcoming report of the New Hamp- 
shire Agricultural Experiment Station. It is not the object of this 
paper to give all the details of these experiments or to report upon 
all of the substances tested, but rather to discuss those features that 
will be of most interest to orchardists. 
a This paper is a report of the second season’s experiments with lime-sulphur prepa- 
rations for summer spraying, together with additional experiments with other sul- 
phur compounds. The work was carried out more thoroughly on both the peach 
and the apple and extended to include the cherry. The experiments resulted in 
some modifications in the method of making the mixtures for the peach and for 
Japanese plums, but on the whole they were very encouraging for further experiments 
and for widespread use in the orchard where Bordeaux mixture is found objection- 
able.-—B. T. Gattoway, Physiologist and Pathologist, and Chief of Bureau. 
3 
[Cir. 27] 
