REPORT OF THE DEPARTMENT OF ENTO- 
MOLOGY. 
THE LIME-SULPHUR-SODA WASH FOR ORCHARD 
PRE AC MEENT* 
P. J. Parrott, 8S. A. Beacu anp H. O. WoopworrTH. 
SUMMARY. 
This bulletin gives the results of the first year’s experiments 
to determine to what extent the lime-sulphur-caustic soda wash 
may be used in place of the bordeaux-arsenical mixtures for 
~ orchard treatment, and the value of this wash for the control of 
the San José scale. 
The results are as follows: 
Applications of the wash for the treatment of the scale gave- 
somewhat variable results, which indicate that the various pre- 
parations were not always equally destructive to the scale. Some 
treatments gave satisfactory results, which show that an efficient 
spray may be prepared in the manner described. For this reason 
and because this method of preparing a sulphur wash is especially 
adapted to use by smaller orchardists, further experiments are to 
be made to test the wash and to devise methods by which all 
preparations may be made equally efficient. 
In the treatment of apple trees the wash proved very efficient 
in preventing injuries by early spring leaf-eating caterpillars, 
as the bud moth and case bearer (7’metocera and Coleophora sp.). 
An examination of samples of foliage shows that the average 
percentage of leaves from treated trees having caterpillar injuries 
is 13.9 per ct. and from untreated trees 71.7 per ct., proving 
that upon the sprayed trees there were 57.8 per ct. less worm- 
eaten leaves because of the treatment. 
* Reprint of Bulletin No, 247. 
