24 BULLETIN 108, IT. S. DEPARTMENT OF AGRICULTURE. 
Table XII. — Yield of string beans as affected by salicylic aldehyde in the field. 
Treatment. 
Yield per plot. 
Yield per acre. 
Vines. 
Beans. 
Vines . 
Beans. 
Check a 
Check b 
Pounds. 
3. 55 
2.94 
Pounds. Pints. 
1.90 i 4.75 
1. 66 1 4. 15 
Pounds. 
2,272 
1,882 
Pounds. : Pecks. 
1,236 190 
1,062 | 166 
Average check 
3.24 
2.71 
1.78 
1.25 
4.45 
3.12 
2,070 
1, 734 
1,149 ! 
800 j 
178 
Salicylic aldehyde 
125 
Difference 
.53 
.53 
1.33 
336 
349 | 
53 
The average yield of vines and beans on the check plots was 3,219 
pounds per acre, and on the salicylic aldehyde plot it was only 2,534 
pounds, a decrease of 685 pounds of green matter per acre. 
The yield of marketable bean crop was reduced 53 pecks per acre, 
or 30 per cent. 
EFFECT ON GARDEN PEAS IN THE FIELD. 
The garden peas were sown on May 21 and the matured vines and 
pods harvested separately on June 30 and weighed. A good stand 
was obtained. The plants showed from the start the effect of the 
salicylic aldehyde, and this became more pronounced with the other 
additions and as they neared maturity. Fruit formation was prac- 
tically nothing on the salicylic aldehyde treated plot. The appear- 
ance of the treated and untreated plot on June 24 is shown in Plate 
VIII, figure 2. The harvested crops are shown in Plate VIII, figure 3. 
The weights and measurements obtained are given in Table XIII. 
Table XIII. — Yield of garden peas as affected by salicylic aldehyde in the field. 
Yield per pic 
Yield per acre. 
Treatment. 
Vines. 
Peas. 
Vines. 
Peas. 
Pounds. 
1.72 
1.50 
Pounds. 
1.66 
1.48 
Pints. 
4.50 
4.00 
Pounds. 
1,101 
950 
Pounds. 
1,062 
947 
Pecks. 
180 
Check b 
160 
1.61 
.52 
1.57 
.16 
4.25 
.43 
1,030 
333 
1,004 
102 
170 
17 
Difference 
1.09 
1.41 
3.82 
697 
902 
153 
The photograph and the table show conclusively the extremely 
harmful action of the salicylic aldehyde on garden peas. The yield 
of total plant material, vines and pods, was 2,034 pounds per acre as 
an average of the untreated checks, as compared with 435 pounds on 
the salicylic aldehyde plot, a decrease of 1,599 pounds. The market- 
able crop — that is, the peas in shell — was depressed from 1,004 pounds 
to only 102, or 90 per cent, practically a total failure. 
