6 BULLETIN 1253, U. S. DEPARTMENT OF AGRICULTURE. 
Table 1. — Summary, box crop, all years and all diseases — Continued. 
Year. 
Bitter-pit. 
Scab. 
*«— -LS^ 
Drought- 
spot. 
Soft scald. 
Cars. 
Per 
cent. 
Cars. 
Per 
cent. 
Cars. 
Per 
cent. 
Cars. 
Per 
cent. 
Cars. 
Per 
cent. 
Cars. 
Per 
cent. 
1917 
3 
2 
8 
9 
5.0 
11.5 
4.2 
7.4 
2 
1.5 
1918 
2 
2 
43 
5.0 
6.0 
21.0 
2 
3 
76 
7.0 
20.3 
13.4 
1 
10.0 
1 1 16.6 
1919. 
2 1 14. 
1 | 7.0 
1920 
1 
12.0 
8 | 6 
Total or average 
22 
6.3 
5 
7.6 
47 
19.6 
81 
13.5 
2 
11.0 
9 
BARREL CROP: DISEASE BY YEARS. 
Figures for single diseases are given in Table 2, but as with the 
box crop the general condition for each year as affected by all disease 
is better shown in Table 3. From this table it appears that per- 
centages of rot, scald, other diseases, and the disease index were 
greatest in 1917 and that while there was no regular decrease in any 
of them from that time on the percentages in 1920 were less than in 
1917, and for rots and the disease index less than in 1918 and 1919. 
The general average of the disease indices for all years was 16.8. 
Table 2.- 
-Summary , barrel crop, all years and all diseases. 
Year. 
Total 
cars. 
Blue-mold 
rot. 
Decay. 
Scald. 
Black -rot. 
Brown-rot. 
Bitter-rot. 
Cars. 
Per 
cent. 
Cars. 
Per 
cent. 
Cars. 
Per 
Cent. 
Cars. 
Per 
cent. 
1 
Cars. 
Per 
cent. 
1917 
53 
117 
570 
808 
12 
23 
327 
615 
12.6 
8.0 
11. 1 
6.7 
30 
79 
164 
37 
19.9 
13.5 
17.7 
5.2 
16 
6 
49 
137 
31.8 
30.5 
40.0 
29.0 
2 
3 
126 
112 
19.0 
15.6 
10.9 
5.7 
1 
2 
1 
11 
2 
3.0 
1918 - . 
1 
9.0 
1919_ ... 
6.9 
1920 
20 | 4. 2 
5.0 
Total or average. .. 
1.54S 
977 
8.3 
310 
15.3 
208 
31.9 
243 
8. 6 | 20 
4.2 
16 
6.3 
Year. 
Total 
cars. 
Alternaria 
rot. 
Rhizopus 
rot. 
Pink-mold 
rot. 
Gray-mold 
rot. 
Scab. 
Blotch. 
Cars. 
Per 
cent. 
Cars. 
Per 
cent. 
Cars. 
Per 
cent. 
Cars. 
Per 
cent. 
Cars. 
Per 
Cars. 
Per 
cent. 
1917 . 
1 
2 
6 
37 
31.0 
12.0 
14.6 
15.7 
13 
17 
14 
78 
17.0 
10. 1 
12.2 
13.2 
3 
2 
45.3 
1918 . 
5.0 
1919 
6 
18 
26.1 
13.6 
1920 
3 3. 6 
2 
2.0 
12 
15.2 
Total or average 
3 
3.6 
24 
16.8 
46 
15.7 
2 
2.0 
122 
13.0 
17 
19.3 
Year. 
Total 
cars. 
Rust. 
Fruit-spot. 
Sooty 
blotch. 
Soft scald. 
Bitter-pit. 
Internal 
breakdown. 
Cars. 
Per 
cent. 
Cars. 
Per 
cent. 
Cars. 
Per 
cent. 
Cars. 
Per 
cent. 
Cars. 
Per 
cent. 
Cars. 
Per 
cent. 
1917.. 
2 
9.5 
3 
4 
4 
9 
34.3 
51.2 
11. 
17.6 
1918... . 
1919.. 
7 
12 
9.4 
13.6 
3 
8 
7.0 
1920 
2 
4 

6. 5 | 2 
16. 
2 
35.0 
26.3 
Total or average 
8.0 
2 1 16. 
20 
25.5 
2 
35.0 
19 
12.1 
11 
21.0 
