ere REPORT OF THE DEPARTMENT OF ENTOMOLOGY OF THE 
Apples.—Applications of the self-boiled caustic soda wash had 
no injurious effect on the trees. This treatment practically eradi- 
cated the scale, only a few being found on fruit taken from 
isolated branches which apparently had not been covered by the 
spray. The apples on the checks were worthless from scale in- 
festation. | 
SUM MARY. 
The results from spraying in the autumn of 1904 have been 
quite satisfactory. In Orchard I there has not been at any time 
during the summer any evidence that the treatment was other 
than beneficial. A similar effect was seen in Orchard II. One 
section of Orchard III was somewhat severely injured by the ap- 
plication of the self-boiled lime-sulphur-salt wash, but this dif- 
ference was overcome during the summer by the increased growth 
of the trees. The results from Orchard IV showed that the kero- 
sene-lime mixtures were unstable and in many cases. were unsafe 
washes; for the application often caused marked reductions in 
leaf and fruit buds, and in some cases the death of the trees. 
The lime-sulphur-caustic soda wash used in this experiment 
caused serious injury to one tree very badly infested with scale 
but otherwise the spray gave satisfactory results. The peaches 
in Orchard V were badly winter killed, but it is believed that 
about 10 per ct. of the buds were injured by the treatment. Apples 
in this same orchard were uninjured by the sprays, and the scale 
was satisfactorily controlled. 
GENERAL SUMMARY AND CONCLUSIONS. 
In the previous work upon this problem the results attending 
the application of the sulphur washes were somewhat conflicting, 
Since some of the treatments caused serious injuries to the buds 
and blossoms, while others in no manner affected the health of 
the trees. But as regards the insecticidal value of the treat- 
ments all the experiments showed that applications at this season 
were uniformly effective upon scale. The work indicated that 
the injuries sustained by the trees were balanced by their in- 
creased vigor and fruitfulness due to the control of the seale. 
The probable losses that an orchard would sustain were not indi- 
cated by this single experiment. These, in order to be thoroughly 
understood, called for further observations covering a number of 
years. . 
ke aa 
