34 BULLETIN 278, IT. S. DEPARTMENT OF AGEICULTUEE. 
Table XVIII. — Sound and wormy apples from sprayed and unsprayed plats — Contd. 
Plat 
No. 
Treatment. 
Tree 
No. 
Condition of fruit. 
Wormy. 
Sound. 
Total. 
Percent 
sound. 
V 
Arsenate of lead (paste), 2 pounds -f commercial 
barium tetrasulphid 5-50. 
Plat total 
1 
2 
3 
4 
5 
806 
450 
216 
258 
328 
9,224 
7,864 
6,988 
7,107 
10,340 
10,030 
8,314 
7,204 
7,365 
10, 668 
90.97 
94.59 
97.00 
97.85 
96.91 
2,058 
41,523 
43,581 
95.28 
Arsenite of zinc (paste), 1J pounds + Bordeaux 
mixture 4-4-50. 
Plat total 
1 
2 
3 
VI 
42 
29 
27 
3,982 
5,121 
3,231 
4,024 
5,150 
3,258 
98.95 
99.44 
99.17 
98 
12,334 
12,432 
99.21 
Arsenite of zinc (paste), 1 J pounds + stone lime, 2 
pounds, to 50 gallons lime-sulphur solution. 
Plat total 
1 
o 
3 
VII 
347 
244 
274 
4,092 
5,478 
5,885 
4,439 
5,722 
6,159 
92.18 
95.74 
90.68 
865 
15,455 
16,320 
94.70 
Arsenate of zinc (homemade), sodium arsenate 
crystals, ^ pound, to 50 gallons lime-sulphur so- 
1 
2 
3 
VIII 
221 
167 
309 
3,654 
3,544 
5,306 
3,875 
3,711 
5,615 
94.30 
95. 50 
94.50 
Plat total 
697 
12,504 
13,201 
94.72 
Checks (unsprayed) 
1 
2 
3 
4 
5 
6 
7 
8 
IX- 
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 
XI 
Plat total 
63.40 
70.81 
62.86 
58.55 
39.64 
43.09 
36.94 
19,764 
28,102 
47,866 
58.71 
Arsenate of lead gave satisfactory control of the codling moth 
when combined with lime-sulphur, commercial precipitated sulphur, 
and commercial barium tetrasulphid. In combination with com- 
mercial sodium sulphid,lead arsenate held the codling moth in check, 
but caused considerable foliage injury and defoliation due to the 
formation of soluble sodium arsenate. The addition of lime lessened 
the foliage injury somewhat. 
Arsenate of zinc, when added to lime being slaked for Bordeaux 
mixture, was effective and caused no foliage injury. Arsenite of 
zinc added to slaking lime and then mixed with lime-sulphur solution, 
and likewise arsenate of zinc (homemade) combined with lime- 
sulphur solution, were slightly less effective than the other arsenical 
combinations. 
Experiment XIX. 
COMBINATION SPRAYS COMPATIBLES AND INCOMPATIBLES. 
Combination sprays for the control of apple chewing and sucking 
insects and fungous diseases were tested in the experimental orchard. 
Arsenate of lead with nicotine solutions and lime-sulphur solution is 
a compatible mixture and will give satisfactory results if the applica- 
tion is timely. 
