22 BULLETIlSr 1027, U. S. DEPARTMENT OF AGRICULTURE. 



Table 5. — Arsenic and lead remaining on sprayed peaches at picking time — Continued. 











Arsemc(As). 



Lead(Pb). 













Sam- 

 ple 

 No. 







Determi- 

 nations 

 made on. 













>> 



S.C 



Spray material used. 



Date 

 sprayed. 



"5 . 



Tj 





-a 



a 



•a 



03 

 ® 



a 

 o 



|l 













-2 



O 



■^2 



1 



S 



go 



< 















Mg. per 











1917. 





Parts per million. 



peach . 



P.ct. 



Gr. 



279359 



1 lb. lead arsenate 



Apr. 4 



Whole * . 



0.05 



0.30 



1.00 



6.9 



0.004 



0.095 



85.5 



95.0 





(powder), 2^ lbs. lime, 





Pulp.... 



.01 



.10 



.40 



3.0 



.001 



.032 



86.6 







50 galls, water. 





Skin 



.20 



1.20 



4.20 



25.8 



.003 



.063 



83.7 







8 lbs. sulphur, 8 lbs. 



Apr. 19 























hydrated lime, 3 ozs. 

























glue, 1 lb. lead arse- 

























nate (powder), 50 

























galls, water. 

























8 lbs. sulphur, 8 lbs. 

 hydrated lime, 3 ozs. 



June 7 













































glue, 50 galls, water. 























27936' 



Check (imsprayed) .... 





Whole < . 



.0 



.0 



.60 



4.0 



.0 



.057 



85.0 



95.4 









Pulp.... 



.0 



.0 



.40 



2.8 



.0 



.032 



85.7 











Skin.... 



.0 



.0 



1.70 



9.8 



.0 



.025 



82.6 





279379 



10 lbs. lead arsenate 



Apr. 4 



Whole < . 



.02 



.10 



.90 



6.3 



.002 



.086 



85.6 



96.2 





(powder), 90 lbs. hy- 



Apr. 19 



Pulp.... 



.01 



.10 



.60 



4.3 



.001 



.048 



86.0 







drated lime. 





Skin.... 



.04 



.20 



2.40 



14.0 



.001 



.038 



82.8 







1 ure sulphur 



June 7 





















279389 



Commercial preparation 



Apr. 4 



Whole!. 



.07 



.50 



1.20 



8.0 



.006 



.110 



85.0 



91.5 





containing 50 per cent 



Apr. 19 



Pulp.... 



.0 



.0 



.80 



5.6 



.0 



.062 



85.6 







sulphur and 50 per 



June 7 



Skin 



.40 



2.30 



3.30 



19.2 



.006 



.048 



82.6 







cent lead arsenate. 























* without stones. 



9 Harvested July 9, Fort Valley, Ga. 



Table 6.— Arsenic, lead, and copper remaining on sprayed cherries at picking time. 



Sam- 

 ple 

 No. 



Spray material used. 



Date 

 sprayed. 



Condition 



of fruit 

 analyzed. 



Arsenic 



(As). 



Orig- 

 inal 

 fruit. 



Dried 

 fruit. 



I>ead (Pb). 



Orig- 

 inal 

 fruit. 



Dried 

 fruit. 



Copper 



(Cu). 



Orig- 

 inal 

 fruit. 



Dried 

 fruit. 



Loss 

 on 

 dry- 

 ing. 



25452 ' 

 254531 



25482 3 



25483 3 



25484 < 



25485 < 



25486 < 



Check (unsprayed) 



Home-made Bordeaux . 



Commercial fungicide 

 containing 12 per 

 cent copper, 3 per 

 cent arsenic. 



3-4-50 Bordeaux, 2 lbs. 

 lead arsenate (paste). 



3-4-50 Bordeaux 



Check (unsprayed) 



IJ galls. Ume-sulphur 

 solution, 2 lbs. lead 

 arsenate (paste), 50 

 galls, water. 



li galls, lime-sulphur 

 solution, 50 galls, 

 water. 



Check (unsprayed) 



Ik galls, lime-sulphur, 

 2 lbs. lead arsenate 

 (paste), 50 galls, wa- 

 ter. 



3-4-50 Bordeaux, 2 lbs. 

 lead arsenate (paste). 



May 30, June 



21. 

 July 3. 



Unwashed . 

 Washed * . . 

 Unwashed , 

 Washed*... 



Unwashed 

 Washed*.. 



May 30, June 

 21. 



July 3. 



Unwashed 

 Washed*.. 



May 29-30, 

 June 20. 



May 29-30, 

 June 20. 



Unwashed 

 Washed*.. 



Unwashed 

 Washed*. . 



0.02 

 .04 

 .02 

 .09 

 .07 



0.16 

 .2 

 .1 

 .7 

 .5 



Partis per willion. 



1.0 

 1.0 



2.3 

 1.1 



1 Picked July 12, 1916, Wenatchee, Wash. 



* Washed by holding under running tap water for a fei 

 3 Sweet cherries, picked July 20, 1916, Hart, Mich. 



* Sour cherries, picked July 20, 1916, Hart, Mich. 



minutes. 



1.2 



.7 



.7 

 1.3 

 1.3 



5.4 

 3.2 



2.8 

 2.8 

 1.9 



5.3 



8.1 

 8.1 



4.6 

 3.3 



0.5 

 2.1 

 1.4 

 2.0 

 1.2 



3.2 

 1.8 



2.3 

 1.6 



4.0 

 11.9 



7.9 

 15.0 



9.0 



14.4 

 8.1 



15.2 

 10.5 



P.ct. 



87. S 

 82.3 



86. T 



77.8 



78.8 

 78.9 



86.7 

 83.9 



84.9 



