6 CIRCULAR 317, U.S. DEPT. OF AGRICULTURE 



obtained by replacing the flour with Y% pints of light-pressed fish oil 

 with a saponification value of 190 to 198, a specific gravity of 0.927 to 

 0.933 at 59° F., an iodine number of 139 to 193, and free-fatty-acid 

 content of less than 5 percent. The oil should be added after the lead 

 arsenate is in suspension in the water. As the oil and lead arsenate 

 residue is not readily washed off the foliage by rain, one application 

 usually gi^es protection for the season. 



PEACHES 



Arsenical sprays are not recommended for peaches because they 

 have at times occasioned some injury to the fruit and foliage. Elberta 

 and later varieties of peaches and young trees that have not come 







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Figure 6.— Unsprayed and well-sprayed foliage. This figure illustrates the deposit on foliage which is 

 necessary to obtain protection from the Japanese beetle. 



into bearing can be protected by the timely application of 32 pounds 

 of hydrated lime in 1 00 gallons of water. It cannot be overemphasized 

 that the protection of peaches is dependent upon applying the spray 

 before the beetles become established on the trees. As this residue 

 is easily washed off by rain, it may be necessary to make several 

 additional applications to obtain adequate protection throughout 

 the season. 



It has not been possible to overcome satisfactorily the attractive- 

 ness of ripening peaches by applying sprays, and no spray is entirely 

 effective in protecting peaches ripening before the Elberta. The 

 lime spray recommended for the late peaches will give some protec- 

 tion to the early varieties. The application of lime to peaches, 

 particularly shortly before harvesting, calls for the use of equipment 

 for removing the residue in order not to interfere with marketing. 



