(434) 
Work on the control of the more destructive insect pests 
has been continued during the entire year, under the super- 
vision of Dr. Seaver, special attention having been given 
to the tussock moth, since this insect has been unusually 
abundant for two seasons past. Hand picking of the egg- 
masses and daubing them with creosote were tried during 
the winter and early spring in order to prevent the hatching 
of the insects. This was supplemented by the spraying of 
the trees during the entire growing season in order to de- 
stroy the larvae which escaped the first treatment. 
The rose beetle remained very destructive and hand 
picking has been resorted to in order to protect the more 
valuable roses and other shrubs. The pine-shoot moth 
continues to be very destructive to certain pines, especially 
the dwarf forms. Removing the infected shoots seems to 
be the only practical remedy and this is not very effective. 
Attention has also been given to the control of destruc- 
tive fungi. The application of sulphur was resorted to in 
the new rose garden as a preventive of rose mildew and 
was found effective. Other fungous diseases are being 
investigated and efforts made to control them. Many 
poplars have been attacked by the poplar canker, which is 
a serious disease and not amenable to any ordinary treat- 
ment. 
Publications 
JOURNAL 
The Journal has been published for each month during 
the year, making a volume of 291 pages, with 19 plates. 
Mycotocia 
This periodical has appeared on alternate months during 
the year, making a volume of 374 pages, with 15 plates. 
NortH AMERICAN FLorRa 
Volume 10, part z, containing descriptions of Agari- 
caceae (pars), by W. A. Murrill, appeared April 26, 1917. 
olume 21, part 2, containing descriptions of Amaran- 
thaceae, by Paul C. Standley, appeared June 9, 1917. 
