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J u - s - - 



CIRCULAR No. 237 JUNE, 1932 



UNITED STATES DEPARTMENT OF AGRICULTURE 

 WASHINGTON, D. C. 



CONTROL OF THE JAPANESE BEETLE ON FRUIT 

 AND SHADE TREES 



By E. R. Van Leeuwen, Associate Entomologist, Division of Japanese and 

 Asiatic Beetle Research, Bureau of Entomology 



CONTENTS 



Page 



„ 1 

 -- 1 



Introduction 



Life history and habits 



Character of injury 3 



Factors influencing control 3 



Spray materials i 5 



Spraying equipment 6 



Recommendations for control in commercial 



plantings of fruit 7 



Apples 7 



Peaches 8 



Plums 10 



Cherries 10 



Grapes 10 



Small fruits 11 



Page 

 Recommendations for control in cities and 



towns 11 



Shade trees 11 



Shrubs and ornamental plantings 12 



Fruit trees 



Miscellaneous methods for destroying beetles 



Jarring 



Traps 



A contact spray 



Green lead arsenate 



An attractive spray 



INTRODUCTION 



Since the Japanese beetle was first discovered in the United States 

 in 1916, it has increased greatly in numbers in certain localities in 

 New Jersey and Pennsylvania. Many of the important food plants 

 grown in the heavily infested area are favorites of the beetle. Be- 

 cause of the economic importance of many of these plants, it was 

 necessary to devise some method of protecting them from injury by 

 this insect. The information given in this circular is based on re- 

 cent experimental work conducted in the infested area adjacent to the 

 point of original discovery. The various measures specified herein 

 are primarily for use in the heavily infested areas shown in Figure 

 1. Unless serious injury resulted from beetle feeding the preceding 

 year, sprays for the control of this insect are not necessary. 



LIFE HISTORY AND HABITS 



The Japanese beetle passes the winter in the larval or grub stage 

 in the soil. About the last of May and early in June the insect 

 changes to the pupa, in which stage it remains for 8 to 20 days. 

 From this pupa the full-grown beetle emerges. Emergence generally 

 begins about the middle of June and continues over a period of from 

 six to nine weeks, the peak occurring shortly after the middle of July 

 during a normal year. 



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