12 
I'.ru.l-rnx 1205, r. S. DEPARTMENT OF AGRiCULTTJBE. 
off the adult curculios after harvest, it can not be recommended, as 
very severe burning, causing abnormal defoliation, occurs when 
post-harvesi spraying is practiced after the liquid spray schedule 
has been carried through during the growing season of the fruit to 
protect it from pests. 
Plal 1 was dusted August 8 and August 2] with do percent hydrated 
lime and 10 per cent powdered arsenate of lead. About one-fifth 
of a pound per tree was used for each post-harvest dusting, and 
the c<>^t per application was about the same as in 1021. 
JABBING AFTER TREATMENT. 
Table 9 gives the number of beetles collected on each plat after 
treating with spray or dust. 
Table 9. — Number of curculios collected after treatment, 1922. 
Date. 
Plat. 
Date. 
Plat. 
1 
2 
3 
4 
1 
2 
3 
4 
Aug. 9 
Beetles. 
18 
Beetles. 
22 
Beetles. 
Btitlrs. 
Aug. 24 
Aug. 2") 
Beetles. 
16 
Beetles. 
22 
B'tihs. 
Beetles. 
Aug. 10 
17 
17 
1 
16 
Aug. 11 
15 
17 
Aug. 26 
12 
10 
Aug. 12 
3 
10 
Aug. 28.. 
2 
17 
Aug. 14 
17 
16 
Aug. 29 
25 
15 
Aug. 15 
11 
11 
Aug. 30 
1 
Aug. 16 
22 
21 
Aug. 31... 
17 
13 
Aug. 17 
4 
16 
Sept. 1 

6 
Aug. 18 
14 
20 
Sept. 2 
Total 
Average per tree . 
26 
21 
8 
8 
Aug. 22 
11 
35 
193 
0.35 
212 
0.39 
54 
0.11 
112 
Aug. 23 
7 
7 
0-22 

By comparing with the collections made before the treatments 
it will be found that there was an increase in the number of beetles 
on the untreated plat, and a decrease on the sprayed and dusted 
{)lats. Table 10 gives the average number of beetles per tree col- 
ected before and after treatment. 
Table 10. — Average number of beetles /»/■ tree collected before and after treatment, 1922. 
Plat 
No. 
Treatment. 
Before 
treat- 
ment. 
After 
treat- 
ment. 
Increase 
or 
decrease. 
Beetle. 
0.28 
. 66 
.13 
.50 
Butte. 
0.35 
• 39 
.11 
.22 
Beetle. 
0.07 
.27 
.02 
.28 
Not treated 
Sprayed once 
Sprayed twice... 
Dusted twice... 
Plat 1 increased 0.07 beetle per tree during the course of the 
experiment; plat 2 decreased 0.27 beetle per tree; plat 3 decreased 
0.02 beetle per tree, and plat 4 decreased 0.28 beetle per tree. There 
were very few beetles on plat 3 before the treatments, and the two 
liquid sprays used on this plat, after it had received the applications 
of the regular spraj schedule while the fruit was on the trees, prac- 
tically defoliated it. There was very little poisoned foliage available 
