MISCELLANEOrS INSKCTICIDE INVESTIGATIONS. 
33 
against 99.44 per cent for 2 pounds of the paste. The unsprayed 
trees yielded 47,866 apples, of which number 58.71 per cent were free 
from codling-mo til infestation. 
Experiment XVIII. 
FIELD TESTS OF VARIOUS ARSEXICALS COMBINED WITH FUNGICIDES AGAINST THE 
CODLING MOTH, 1914. 
Arsenate of lead was tested against the codling moth in combina- 
tion with the following commercial fungicides, namely, lime-sulphur, 
commercial; precipitated sulphur, commercial; sodium sulphid, com- 
mercial ; and commercial barium tetrasulphid compound. The follow- 
ing combinations were also tested: 
Arsenite of zinc (paste) was used at the rate of 1? pounds combined 
with Bordeaux mixture 4-4-50. This arsenical was added to the 
lime while being slaked for the Bordeaux mixture. 
Arsenite of zinc (paste), 1^ pounds, was added to 2 pounds stone 
lime while the lime was slaking. This was mixed with 50 gallons lime- 
sulphur solution. 
Arsenate of zinc (homemade), prepared from sodium arsenate 
crystals and zinc sulphate, was used at the rate of eight-tenths pound 
sodium arsenate to 50 gallons lime-sulphur solution. Three spray 
applications were made with the above combinations. The results 
of this experiment will be found in Table XVIII. 
Table XVIII. — Sound and wormy apples from sprayed and unsprayed plats. 
[Poison test. Miscellaneous. Benton Harbor, Mich., 1914.] 
Plat 
No. 
Treatment. 
Tree 
No. 
Condition of fruit. 
Wormy. 
Soimd. 
Total. 
Tor cent 
sound. 
I 
Arsenate of lead (paste), 2 pounds to 50 gallons 
lime-sulphur solution. 
Plat total 
1 
2 
3 
4 
5 
6 
29 
12 
28 
13 
26 
26 
3,777 
2,399 
5, L46 
3,833 
3,972 
4,757 
3,S06 
2,411 
5,174 
3,846 
3,998 
1,783 
99.24 
99.59 
99.46 
99.66 
99.35 
99.46 
134 
23,884 
24,018 
99.44 
Arsenate of lead (powder), $ pound + commercial 
precipitated sulphur, 7 pounds, to 50. 
Plat total 
1 
2 
3 
II 
44 
93 
82 
5,618 
8,958 
7,791 
5,662 
9,051 
7,873 
99.22 
98.97 
98 96 
219 
22,367 
22,586 
99.03 
Arsenate of lead (paste), 2 pounds + commercial 
sodium sulphid, 2 pounds, to 50. 
Plat total 
1 
2 
3 
III 
72 
30 
34 
7,898 
7,784 
8,739 
7,970 
7,814 
8,773 
99.08 
99.62 
99.61 
136 
24,421 
24,557 
99.45 
Arsenate of lead (paste), 2 pounds + stone lime, 
2 pounds + commercial sodium sulphid, 2 
pounds, to 50. 
Plat total 
1 
2 
3 
rv 
35 
22 
39 
8,295 
6,269 
9,639 
8,330 
6,291 
9,678 
99.58 
99.65 
99.60 
96 
24,203 
24,299 
99.65 
