s 



BULLETIN 278, U. S. DEPARTMENT OP AGRICULTURE. 



preparations were prepared and diluted as given on page 2. The 

 results against the codling moth are shown in Table IV. 



Table IV. — Sound and wormy apples from sprayed and unsprayed plats. 

 [Poison test, Benton Harbor, Mich., 1912.] 



Plat 

 No. 



Treatment. 



Tree 

 No. 



Condition of fruit. 



Wormy. 



Sound. 



Total. 



Per cent 

 sound. 



I 



Arsenate of lead (paste), 2 pounds to 50 gallons 



1 

 2 

 3 



64 



14 



9 



4,430 



1,542 



879 



4,494 



1,556 



888 



98.58 





Plat total 



99.10 

 98. 9S 







87 



6,851 



6,938 



98.74 





Arsenate of lead (paste) commercial No. 1 (tri- 

 plumbic), 2 pounds to 50 gallons lime-sulphur 







II 



1 

 2 

 3 



33 



84 

 44 



874 

 1,727 

 1,115 



907 

 1,811 

 1,159 



96.36 





Plat total 



95.36 

 96.20 







161 



3,716 



3,877 



95.85 





Arsenite of zinc (powder), f pound to 50 gallons 







III 



1 

 2 

 3 



4 

 20 

 15 



734 

 1,110 



744 



73S 



1,130 



759 



99.46 





Plat total 



98.23 

 98.02 







39 



2.588 



2,627 



98. 52 





Arsenite of zinc (paste), 1$ pounds to 50 gallons 







IV 



1 

 2 

 3 



i9 



27 



1,387 



2,638 



486 



1,406 



2,665 



493 



98.65 





Plat total 



98.99 

 98.58 







53 



4,511 



4,564 



98.83 





Arsenite of lime, homemade, 2 pints to 50 gallons 







V 



1 



2 

 3 



32 

 75 

 52 



680 

 1,282 

 1,201 



712 

 1,357 

 1,253 



95.50 





Plat total 



94.47 

 95.85 







159 



3,163 



3,322 



95. 21 





Arsenate of zinc, homemade, at rate of 0.8 pound 

 sodium arsenate to 50 gallons lime-sulphur so- 







VI 



1 

 2 

 3 



80 

 261 

 108 



1,030 

 1,597 

 1,257 



1,110 



1,858 

 1,365 



92.79 





Plat total 



85.95 

 92.09 







449 



3,884 



4,333 



89.63 





Arsenate of iron, c. p. (powder), J pound to 50 







VII 



1 

 2 

 3 



174 

 413 

 254 



942 

 1,176 

 1,228 



1,116 



1.5S9 



l. 182 



84.41 





Plat total 



74.01 

 82.86 







841 



3,346 



4,187 



79.91 





Arsenate of iron, homemade, at rate of 0.8 pound 

 sodium arsenate to 50 gallons lime-sulphur so- 







VIII 



1 

 2 

 3 



22S 

 205 

 537 



800 



'.170 

 1,466 



1,028 



1,175 

 2,003 



77 82 





Plat total 



82.55 

 73.19 







970 



3,236 



4,206 



76.93 





Arsenate of calcium, c. p. (powder), \ pound to 50 







IX 



1 



2 

 3 



205 

 95 

 160 



1,672 

 529 



SI7 



1,877 



624 

 1,007 



89 03 





Plat total 



84.77 



SI. 11 







460 



3,048 



3,508 



Mi SS 











X 



1 



2 

 3 



257 



is; 

 741 



231 

 271 

 445 



•l.ss 



761 



1,189 



47 33 





Plat total 



36.01 

 37.43 







1.488 



950 



2,438 



38 96 











