February, ’23] 
BRITTAIN! CABBAGE MAGGOT CONTROL 
61 
on that phase of forest entomology would give knowledge that would 
be of great importance and value in assisting in control work. 
Mr. E. P. Felt: I would like to emphasize, in connection with the 
control of leaf-eating insects in forests, the desirability of securing better 
protection of bird life. Of course that will not remedy the situation 
next week or next month. There have been figures published within 
recent years showing a material reduction in bird life, and as I have 
studied the situation in New York State, it has seemed to me that there 
has been a connection—not perhaps very close—between that and a 
perceptible increase in the ravages of leaf-eating insects. 
Another point in this connection, is this: I imagine most entomologists 
of this country do not realize that in Massachusetts at the present time 
there are practically no efforts to control the gipsy moth in ordinary 
woodland areas, and if that situation is allowed to continue, it is going 
to be practically impossible to grow trees to timber size in areas infested 
by the gipsy moth. Think of what this will mean, particularly in this 
country, as we are facing a serious timber shortage, destined to become 
more acute as the years progress. 
President. J. G. Sanders: The next paper is by W. H. Brittain, 
entitled “Some Experiments in the Control of the Cabbage Maggot." 
SOME RECENT EXPERIMENTS IN THE CONTROL OF THE 
CABBAGE MAGGOT (CHORTOPHILA BRASSICAE BOUCHE) 
By W. H. Brittain, Provincial Entomologist for Nova Scotia 
Abstract 
Experiments with a number of compounds for the control of the cabbage maggot, 
Chortophila brassicae for a period of eight years have shown that considerable 
latitude in the use of corrosive sublimate is allowable and that even under adverse 
weather conditions there is no necessity of applying the treatment until several days 
after the flies appear. It has also been demonstrated that the application remains 
effective for some time; the same is true of treatments with creosote or anthracene 
oil dust, though not to the same extent. 
During the past eight years experiments in the control of the cabbage 
maggot have been carried out by the Entomological Division of the 
Department of Agriculture of Nova Scotia. During this time many 
methods and materials for the control of the cabbage maggot have been 
tested. During this period some of these have proved worthless, some 
have given fair results, while, of those that have given invariable satis¬ 
faction, four have survived to be included in the 1922 tests. 
It has been our custom in these experiments to run three series of plots. 
Any new or untried material is thus placed first in our “trial plots," 
