MISCELLANEOUS INSECTICIDE INVESTIGATIONS. 
Table IX. — Tests of the lilting effect of various poisons on the tussoch moth. 
[Experiment started Juno 20, 1913, Benton Harbor, Mich.; 25 larvae in each lot.] 
17 
Name and dilution. 
Dates of examina- 
tion and larvae 
dying in each lot. 
1 
-a 
u. 
<x> 
,2 
S 
s 
a 
H 

& 
t-i 
x) 
■OJb 
9 
a 
gi 
6 
o 
June. 
July. 
28 
30 
2 
4 
6 
03 
3 
a 1 
02 
1 
Arsenate of lead paste, commercial, 2-50 
13 
15 
11 
13 
7 
18 
10 
16 
17 
4 
2 
5 
9 
10 
6 
10 
4 
17 



10 
12 
5 
8 
6 
8 



12 
10 
11 
12 
18 
7 
15 
9 
8 
11 
3 
8 
7 
7 
15 
6 
17 
7 
9 
6 
5 
10 
9 
15 
15 
9 
8 
1 

2 
25 
25 
25 
25 
25 
25 
25 
25 
25 
25 
25 
25 
25 
25 
25 
25 
25 
25 
25 
25 
25 
25 
25 
25 
25 
25 
25 
3 
3 
4 
4 
4 
6 
4 
4 
4 
4 
4 
4 
10 
8 
8 
10 
8 
6 
10 
8 
6 
6 
8 
6 
8 
8 
8 
10 
8 
8 
0.06 
2 
do 
.01 
3 
do 
3 
.08 
4 
Arsenate of lead powder, commercial (1), 1-50. 
.01 
5 
do 
.05 
6 
do 
.02 
7 
Arsenate of lead powder, commercial (2), 1-50 
.07 
g 
do 
.04 
q 
do 
.02 
10 
Arsenate of calcium paste, commercial, 1 J-50 
1 
7 
10 
4 
4 
4 
1 
3 
1 
16 
16 
20 
1 
1 


8 
3 



5 
13 
2 
2 
4 
4 
"*3" 
.50 
11 
do 
.68 
1? 
do 
.42 
13 
Arsenate of calcium, homemade (1), 0.8-50 
.20 
14 
do 
.38 
15 
do 
.15 
Ifi 
Arsenate of calcium, homemade (2), 0.8-50 

5 
.10 
17 
do 
.23 
18 
do 
.06 
IP 
Lead chromate, commercial, 8-50 
.55 
20 
do .... 
3 
.20 
?1 
do 
.18 
?,?, 
Arsenate of zinc, homemade, 0.8-50 
4 
3 
5 
1 
2 
6 

3 
2 
.... 
"2 


.46 
?? 
do 
.38 
?4 
do 
.62 
?5 
Arsenite of zinc powder, commercial, J-50 
.60 
?6 
do 
.74 
?7 
.72 
28 
Check (unsprayed) 
5. SO 
W 
7.20 
30 
do 
5.55 
Experiment X. 
FIELD TFSTS OF VARIOUS ARSENICALS AGAINST THE CODLING MOTH, 1913. 
Field tests were made with the following preparations against the 
codling moth on apple: Arsenate of lead paste, commercial; arsenate 
of calcium paste, commercial; arsenate of calcium, homemade, pre- 
pared from sodium arsenate and calcium acetate; arsenate of cal- 
cium, homemade, prepared from sodium arsenate and calcium 
chlorid; arsenite of zinc powder, commercial; and arsenate of zinc, 
homemade. (For methods of preparation of the homemade mate- 
rials, see p. 2.) All the materials were used in combination with 
lime-sidphur, H to 50. The spraying was done in Mr. J. T. Beck- 
wit Ifs orchard in the vicinity of Benton Harbor, Mich., the same 
orchard that was used for the experimental work of the previous 
season. The results of this experiment are shown in Table X. 
98119°— Bull. 278—15 3 
