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JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 13 
previous season. Cooler weather prevailed throughout 1919, however, 
so that no part of a fourth brood appeared; all broods were later in the 
season, and the infestation was correspondingly less as is shown by the 
check plat. The last spray, put on August 11 to 12, was late enough 
to protect the fruit against all late worms. On one plat a later applica¬ 
tion was made but this proved to be unnecessary. 
In the case of plat 9 in 1918 where a spray-gun was used from the 
ground nearly one-half of the fruit was wormy. In 1919 on plats 6 and 
7 where the spray-gun was used from the tower and the ground the 
results were 77.86 and 87.33 per cent respectively. This may be ex¬ 
plained by the fact that it is impossible to give the fruit as fine a coat 
of spray material with the gun and the tendency to overspray some 
parts of the trees and underspray other parts is greatly increased. 
The results in these plats were relatively much poorer in 1918 when the 
infestation was much more severe than in 1919. It is probable that 
these results may not be applicable in regions where the infestation 
is less severe and where the requirements of spray being distributed 
uniformly over the apple is less exacting. However, these plats 
clearly demonstrate the inefficiency of relatively coarse sprays under 
Ozark conditions. 
The conclusions that may be drawn from the experimental work in 
the control of the codling moth in the Ozarks thus far are the necessity 
of making six to seven spray applications, depending upon the season, 
and the desirability of a very fine mist in preference to a coarse spray. 
Mr. E. G. Kelly: What pressure did you use with the gun? 
Mr. Dwight Isely: Two hundred and fifty pounds. 
President W. C. O’Kane: The next paper is “Some Experiences 
with the Codling Moth,” by T. J. Headlee. 
SOME EXPERIENCES WITH THE CODLING MOTH 
By Thomas J. Headlee, Ph.D., New Brunswick , N. J. 
New Jersey Conditions 
It no doubt seems to many of the members of our association, par¬ 
ticularly the younger ones, that the codling moth is an exceedingly 
threadbare subject, but the writer’s experience in the last two years 
with this insect has indicated to him that there are still many important 
facts in connection with its control that are not yet sufficiently under¬ 
stood. In the last two years, he has seen pretty nearly nine out of 
every ten orchardmen in his state fail to obtain a satisfactory control 
of this insect. Not only has he observed it in New Jersey, but he finds 
that a similar condition appears to exist in the state of Delaware. 
