JOURNAL 
OF 
ECONOMIC ENTOMOLOGY 
OFFICIAL ORGAN AMERICAN ASSOCIATION OF ECONOMIC ENTOMOLOGISTS 
Vol. 13 APRIL, 1920 No. 2 
Proceedings of the Thirty-Second Annual Meeting of the 
American Association of Economic Entomologists 
(Continued from p. 147) 
Afternoon Session, Thursday, January 1, 1920 , 12.45 p. m. 
President W. C. O’Kane: The first paper on the program is 
“Features of the Codling Moth Problem in the Ozarks,” by Dwight 
Isely and A. J. Ackerman. 
SOME FEATURES OF THE CODLING MOTH PROBLEM IN THE 
OZARKS 1 
t r \ 
By Dwight Isely and A. J. Ackerman, Bureau of Entomology 
A number of features of the codling moth problem in the Ozarks 
vary quite widely from its usual aspect in most of the apple regions 
of the United States. The relatively southern latitude of the Ozark 
region with its long growing season gives time for a larger number of 
broods than in regions farther north. Its inland situation and dis¬ 
tance from bodies of water which produce equalizing effect upon tem¬ 
perature is probably responsible for the comparatively erratic seasonal 
history. The large number of broods and the fact that two of these 
broods, moths of the first and second, and immature stages of the sec¬ 
ond and third, occur during the heat of summer (a condition favorable 
to extraordinary prolificacy) produces an infestation of greater severity 
1 This paper is based on studies of the life history and control of the codling moth 
conducted during the seasons 1918 and 1919 at Bentonville, Ark., under the direc¬ 
tion of Dr. A. L. Quaintance. The Bureau of Plant Industry represented by Mr. 
Leslie Pierce cooperated in spraying experiments. Mr. F. L. Wellman assisted the 
writers in routine work during both seasons. 
Presented with permission of secretary of agriculture. 
