24 BULLETIN" 108, U. S. DEPARTMENT OF AGRICULTURE. 



Table XII. — Yield of string beans as affected by salicylic aldehyde in the field. 



Treatment. 



Yield per pi 



3t. 



Yield per acre. 



Vines. 



Beans. 



Vines. 



Beans. 



Check a 



Check b 



' Pounds. 



3-55 



2. 94 



Pounds. 

 1.90 

 1.66 



Pints. 

 4.75 

 4.15 



Pounds. 

 2,272 



1,882 



Pounds. 

 1,236 

 1,062 



Pecks. 

 190 

 166 













3. 24 



1.78 

 1.25 



4.45 

 3.12 



2,070 

 1,734 



1,149 

 800 



178 



Salicylic aldehyde 



2. 71 



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. 



Treatment. 



Yield per plot. 



Yield per acre. 



Vines. 



Pe 



as. 



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 6 



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 marke1> 

 able crop — that is, the peas in shell — was depressed from 1,004 pounds 

 t<» only 102, or 90 per cent, practically a total failure. 



