18 
BULLETIN 1253, U. S. DEPARTMENT OF AGRICULTURE. 
are handled well and all eastern apples poorly. It would be equally 
wide of the truth to assume that careful handling or any other one 
factor is alone responsible for the differences here shown to exist be- 
tween the two crops in susceptibility to disease and in general keeping 
quality. As a matter of fact, such differences are the result of all the 
factors that have affected the fruit throughout its whole history. 
SCALD BY CROPS. 
In Tables 19 and 20 are given figures showing the percentages of 
scald by varieties, by months, for both barrel and box crops, calcu- 
ated on the basis of cars showing scald. 
For the box crop, Table 19 shows that while a relatively small 
amount of scald appeared as early as November or December in 
Grimes Golden, Ortley, Yellow Newtown, Rome Beauty, or Winter 
Banana, the disease did not become serious until February and 
usually reached its greatest proportions in March. 
In the barrel crop (Table 20) scald did not appear until December; 
it began to be serious in January, a month earlier than in the box 
crop, and reached the maximum in March. 
Table 19. — Summary, box crop, 1917-1920, scald by varieties, by months. 
Variety. 
November. 
December. 
January. 
February. 
March. 
Cars. 
Per cent. 
Cars. 
Per cent. 
Cars. 
Per cent. 
Cars. 
Per cent. 
Cars. 
Percent. 
Arkansas (Mammoth 
Black Twig)... 
1 
1 
15.0 
3.0 
5 
6 
6 
1 
1 
2 
24.4 
33.5 
Ben Davis 
1 
1 
4.0 
15.0 
17. 1 
Delicious.. . 
1.0 
Esopus Spitzenburg 
12.0 
Gano. ... 
1 
2.0 
28.5 
Grimes Golden 
1 
75.0 
1 
62.0 
Jonathan 
1 
1 
11.0 
2.0 
3 
4.3 
2 
9.5 
Mcintosh _ 
Ortley. ._ 
1 
12.0 
1 
2 
3.0 
7.0 
6 
62 
8 
15.3 
Rome Beauty . 
3 
14.3 
25 
8 
1 
4 
16 
17.1 
17.7 
70.0 
35.5 
16.6 
30.8 
Stayman Winesap 
15.6 
Wagener . _ 
2 
1 
4 
9.5 
15.0 
8.2 
White Pearmain 
6 
117 
22.0 
Winesap. 
8.2 
Winter Banana 
1 
2 
3 
15.0 
2.0 
13.6 
Yellow Newtown. 
3 
2 
5.0 
13.0 
23 
18 
14.7 
11.9 
85 
94 
21.8 
Mixed varieties. _ 
1 
1.0 
14.6 
Total or average 
3 
29.3 
10 
12.9 
19 
9.6 
101 
16.1 
401 
17.3 
Variety. 
April. 
May. 
June. 
Total. 
Cars. 
Percent. 
Cars. 
Per cent. 
Cars. 
Per cent. 
Cars. 
Per cent. 
6 
18 
14 
3 
1 
4 
2 
6 
1 
10 
105 
19 
3 
14 
645 
1 
165 
174 
22.8 
Arkansas Black. 
10 
6 
1 
18.8 
9.8 
2.0 
1 
1 
5.0 
10.0 
22.0 
12.5 
Delicious 
6.0 
Esopus Spitzenburg. . .. 
12.0 
1 
8.0 
16.7 
63.5 
Jonathan 
7.1 
Mcintosh .. 
2.0 
Ortley. _. 
2 
12 
3 
8.0 
41.0 
21.6 
12.3 
Rome Beauty . 
1 
25.0 
27.8 
Stayman Winesap 
17.4 
Wagener 
29.6 
1 
200 
7.0 
11.3 
2 
190 
15.5 
13.3 
23.3 
Winesap 
118 
17.1 
12.5 
15.0 
44 
39 
20.5 
13.8 
7 
13 
17.0 
14.5 
1 
4 
7.0 
19.7 
19.6 
Mixed varieties.. 
14.2 
Total or average .. 
319 
14.2 
215 
13.0 
123 
10. 2 
1,191 
15.6 
