32 BULLETIN 278, _U. S. DEPARTMENT OF AGRICULTURE. 
Table XVII. — Sound and wormy apples from sprayed and unsprayed plats — Contd. 
Plat 
No. 
Treatment. 
Tree 
No. 
Condition of fruit. 
Wormy. 
Sound. 
Total. 
Per cent 
sound. 
Ill 
Arsenate of lead (powder), | pound to 50 gallons 
1 
2 
3 
97 
123 
68 
7,250 
5,615 
6,315 
7,347 
5,738 
6,383 
98.68 
Plat total . . 
97.85 
98.93 
288 
19,180 
19,468 
98.52 
Arsenate of lead (powder), \ pound combined 
with commercial precipitated sulphur, 7 
IV 
1 
2 
3 
44 
93 
82 
5,618 
8,958 
7,791 
5,662 
9,051 
7,873 
99.22 
Plat total 
98.97 
98.96 
219 
22,367 
22,586 
99.03 
Arsenate of lead (paste), 1 pound to 50 gallons 
V 
1 
2 
3 
4 
5 
74 
39 
65 
64 
76 
6,160 
4,163 
4,836 
6,394 
5,787 
6,234 
4,202 
• 4,901 
6,458 
5,863 
98.81 
Plat total 
99.07 
98.67 
99.01 
98.69 
318 
27,340 
27,658 
98.13 
Arsenate of lead (powder) , 1 pound to 50 gallons 
VI 
1 
2 
3 
4 
5 
123 
41 
79 
51 
121 
5,043 
6,718 
5,418 
7,224 
7,749 
5, 166 
6,759 
5,497 
7,275 
7,870 
97.62 
Plat total 
99.39 
98.56 
99.30 
98.46 
415 
32,152 
32,567 
98. 73 
Arsenate of lead (paste), 2 pounds to 50 gallons 
VII 
1 
2 
3 
4 
5 
6 
29 
12 
28 
13 
26 
26 
3,777 
2,399 
5,146 
3,833 
3,972 
4,757 
3,806 
2,411 
5,174 
3,846 
3,998 
4,783 
99.24 
Plat total 
99.59 
99.46 
99.66 
99.35 
99.46 
134 
23,884 
24,018 
99. 44 
Checks (unsprayed) 
VIII-X 
2 
3 
4 
5 
6 
7 
8 
1,548 
3,208 
2,342 
2,432 
2,635 
2.385 
2,902 
2,312 
3,907 
5,556 
5,682 
4,116 
3,722 
1,566 
2,197 
1,356 
5,455 
8,764 
8,024 
6,548 
6,357 
3,951 
5,099 
3,668 
71.62 
Plat total 
63.40 
70.81 
62.86 
58.55 
39.64 
43.09 
36.94 
19,764 
28,102 
47,866 
58.71 
As will be noted in Table XVII, there is practically no difference 
from an insecticidal point of view in the effectiveness of the powdered 
and the paste arsenate of lead. The fruit grower would be justified 
in using the powdered form if the present difference in cost is con- 
sidered reasonable for the advantages secured. 
One-fourth pound of the powdered arsenate of lead gave 95.03 
per cent of fruit free from codling moth against 95.22 per cent where 
one-half pound of the paste was used. The two plats sprayed with 
one-half pound of the powder gave 98.52 and 99.03 per cent of sound 
fruit, respectively, as compared with 98.13 per cent for 1 pound of the 
paste. One pound of the powder averaged 98.73 per cent sound 
