Apr. 5, 1924 
Effect of Modified Hot- Water Treatment on Wheat 
91 
Table XIII.— Loose smut infection and yield in 1921 of two lots of Goens wheat 
grown from untreated seed and from seed treated by the modified hot-water method 
Lot number 
Acre yield in bushels 
Percentage of loose 
smut 
Untreated 
Treated 
Untreated 
Treated 
7. 
25.2 
24 1 
11 
o 
13. 
25.0 
24 2 
7 
o 
Average. 
25.10 
24.15 
9 
0 
Table XIII shows that plants from treated seed yielded 0.95 of a bushel per 
acre less than those from untreated, although the latter contained an average of 
9 per cent loose smut. 
In a yield test in 1922, there were used three different lots of Goens wheat grown in 
Indiana in 1921, and one lot each of Fulcaster (C. I. 6162) and Purplestraw (C. I 
1915) wheats grown on Arlington Experiment Farm in 1921. A definite quantity 
of each lot was weighed and measured, treated on October 13, 1921, spread out in 
thin layers, and dried for one week. At the end of this period the treated seed had 
regained its original weight and volume. On October 20 the untreated and treated 
seed was sown in rod rows on Arlington Experiment Farm, Va., at the rate of 
6 pecks per acre on the same land used for the yield experiments of the preceding 
year. Five plats, each divided into 2 sections, were used. Each of the 10 sections 
contained 55 rows, or 11 successive rows of each of the five seed lots. The first 9 
rows of each seed lot comprised a study of other hot-water treatments not 
discussed in this paper, while the tenth and eleventh were sown to seed treated 
by the modified method and to the untreated seed, respectively. The results are 
presented in Table XIV. 
Table XIV.— Loose smut infection and yields in 1922 of five lots of wheat each 
grown from untreated seed and from seed treated by the modified hot-water method 
Section of plat 
Lot 
No. 
Variety 
Acre yield in bushels of each of 5 plats 
Average 
percent¬ 
age of 
loose 
smut for 
all 5 plats 
Plat 1 
Plat 2 
Plat 3 
Plat 4 
Plat 5 
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East. 
Do. 
Do. 
Do. 
Do. 
Average 
16 
17 
19 
26 
27 
Goens. 
.do. 
.do. 
Fulcaster.. 
Purplestraw. 
35.1 
34.5 
33.3 
22.7 
28.6 
29.0 
20.8 
23.3 
24.6 
17.3 
35.0 
35.1 
32.4 
28.8 
36.3 
27.7 
19.5 
26.6 
21.9 
26.5 
40.7 
37.3 
31.0 
25.1 
44.1 
30.0 
24.5 
21.4 
22.3 
30.5 
31.3 
33.5 
29.7 
27.7 
39.3 
25.3 
20.8 
24.8 
16.8 
26.1 
35.4 
32.1 
32.0 
26.8 
38.1 
24.0 
20.0 
22.7 
22.0 
28.5 
P.c. 
7.2 
6.8 
10.9 
0 
0 
P. c. 
0 
0 
0 
0 
0 
30.8 
23.0 
33.5 
24.4 
35.6 
25.7 
32.3 
22.8 
32.9 
23.4 
West. 
Do. 
Do. 
Do. 
Do. 
Average. 
16 
17 
19 
26 
27 
Goens. 
.do. 
.do. 
Fulcaster. 
Purplestraw. 
32.1 
36.0 
31.1 
32.0 
30.6 
28.7 
23.8 
28.6 
32.0 
27.4 
36.3 
40.1 
29.7 
28.0 
34.6 
26.8 
31.6 
28.3 
29.4 
31.0 
40.5 
39.5 
32.8 
31.8 
34.8 
29.3 
25.6 
33.9 
33.3 
35.7 
38.1 
39.7 
32.1 
34.8 
36.6 
33.6 
25.7 
27.3 
32.7 
29.7 
35.3 
34.5 
28.0 
31.4 
37.0 
34.3 
24.3 
21.1 
24.3 
32.2 
7.1 
11.1 
15.0 
0 
0 
0 
0 
0 
0 
0 
32.4 
28.1 
33.7 
29.4 
35.9 
31.6 
36.3 
29.8 
33.2 
27.2 
Average yield for all plats, east section: Untreated 33.0 bushels per acre; treated 23.9 bushels per acre. 
Average yield for all plats, west section: Untreated 34.3 bushels per acre; treated 29.2 bushels per acre. 
Average yield for all plats, both sections: Untreated 33.7 bushels per acre; treated 26.6 bushels per acre. 
