CONTROL OF THE JAPANESE BEETLE ON FRUIT AND SHADE TREES IE 



JARRING 



One of the easiest methods for destroying beetles on heavily in- 

 fested plants is to jar the plants early in the morning (before 7 

 a. m.) when the temperature is low. The beetles fall to the ground, 

 where they may be caught on sheets spread beneath the branches. 

 They may then be killed by placing them in cans or buckets con- 

 taining water and kerosene. 



traps 3 



A mechanical trap in which an attractive bait containing geraniol 

 is used is effective in catching large numbers of beetles. The trap is 

 of no value as a means of control^ however, since it does not capture 

 all the beetles attracted to it, and those beetles which are not cap- 

 tured increase the infestation in the neighborhood of the trap. At 

 the present time traps can play no part in the protection of plants 

 within the heavily infested area. 



A CONTACT SPRAY* 



Beetles can be destroyed with a spray which kills by contact. This 

 spray is composed of sodium oleate and an alcoholic extract of 

 pyrethrum flowers diluted with water. In using this spray it is 

 necessary to wet the beetles thoroughly. The spray is harmless to 

 foliage, but it does not prevent reinfestation. 



GREEN LEAD ARSENATE 5 



There has been some objection to the conspicuous white deposit 

 of lead arsenate that remains on plants after spraying, especially on 

 shrubs and ornamentals. The unsightly residue can be avoided by 

 using lead arsenate that has been colored green. Unfortunately, 

 green lead arsenate is less repellent to beetles than ordinary white 

 lead arsenate and more injury is caused by their feeding when it is 

 used, although more beetles are killed. 



AN ATTRACTIVE SPRAY « 



Where destruction of beetles is desired rather than protection to 

 foliage or fruits from beetle attacks, a spray consisting of green lead 

 arsenate, sirup, emulsified geraniol, and water is recommended. 

 Beetles will feed readily on this poisonous spray, but greater injury 

 to the sprayed plants will result. Beetles will be attracted great dis- 

 tances and an increase in the volume of leaf area consumed will 

 result from an increase in the natural population. 



3 These traps and their operation have been described in U. S. Dept. Agr. Misc. Pub. 

 147, a copy of which can be obtained by addressing the U. S. Department of Agriculture, 

 Washington, D. C. 



* For information concerning the formula of this spray and its use for destroying beetles 

 write the Japanese Beetle Laboratory at Moorestown, N. J., for Circular 92 of the New 

 Jerspy Department of Agriculture. 



5 For further information on the manufacture and use of green lead arsenate write to 

 the Japanese Beetle Laboratory, Moorestown, N. J., for Circular 143 of the New Jersey 

 Department of Agriculture. 



6 The formula for this spray and any other information not covered in this circular 

 can be secured by addressing the Japanese Beetle Laboratory, Moorestown, N. J. 



