UNITED STATES DEPARTMENT OF AGRICULTURE 
BULLETIN No. 837 i 
Contribution from the Bureau of Entomology 
L. O. HOWARD, Chief 
Washington, D. C. 
June 3, 1920 
CONTROL OF THE GRAPE-BERRY MOTH IN NORTHERN OHIO. 
By H. G. Ingeeson, Scientific Assistant, and G. A. Runneb, Entomological 
Assistant, Deciduous Fruit Insect Investigations. 1 
CONTENTS. 
Page. 
Introduction 1 
History in Ohio 2 
Northern Ohio conditions affecting 
infestation 2 
Varietal infestation 4 
Seasonal history 4 
Page. 
Relation between seasonal-history 
data and control measures 5 
Natural control of first-brood larya?_ 6 
Control experiments 7 
Conclusions 26 
Recommendations 26 
INTRODUCTION. 
The grape-berry moth {Polychrosis vlteana Clem.) has been the 
most destructive insect pest with which the grape growers of rxorth- 
ern Ohio have ever had to contend. In an effort to improve the 
methods of control for this insect, extensive experiments in coopera- 
tion with the Ohio Agricultural Experiment Station were conducted 
during the seasons of 1916, 1917, and 1918 in northern Ohio. The 
results of these experiments and the recommendations based thereon 
are contained in this paper, together with observations made during 
the investigation. Only such life-history data are presented as are 
necessary for the understanding of the control experiments. The 
complete life-history data will be presented in a later paper. 
1 This investigation was conducted under the direction of Dr. A. L. Quaintance, En- 
tomologist in Charge of Deciduous Fruit Insect Investigations of the Bureau of Ento- 
mology. The senior author, assisted by E. R. Selkregg, then field assistant in the 
Bureau of Entomology, conducted the work during the season of 1916. Much credit is 
due Dwight Isely of the Bureau of Entomology for his suggestions on grape-insect control, 
based on similar investigations in the Chautauqua-Erie grape belt of Pennsylvania. The 
results of Mr. Isely's investigations are published in United States Department of Agri- 
culture. Bulletin No. 550. The authors wish to express their appreciation to Prof. H. A. 
Gossard, entomologist of the Ohio Agricultural Experiment Station, for his help in many 
ways. To the many grape growers who have cooperated most willingly the authors 
express their thanks. 
147842°— 20— Bull. 837 1 
