21 
kerosene, 6.6. It will be noticed that notwithstanding the fact that 
the kerosene plot contained an average of 110 stalks per row fewer 
than the check, the number of ear-bearing stalks was 27 per row 
greater than in the check. Even the kerosene, tho it seemed to have 
lessened the stand by an injury to the seed, had increased the yield 
nearly 7 percent by protecting the corn against the drain of root-louse 
attack, thus preventing the blighting of a considerable percentage of 
the remaining stalks. Under the conditions present during this season 
and in th's field, all these treatments had an ultimate beneficial result, 
according to the data thus repeatedly and carefully collected, the 
actual ratio of benefit being, however, nearly four times as great from 
the use of the oil of lemon as from the use of kerosene. 
Inspection of September 20 
Check 
Oil of 
lemon 
Carbolic 
acid 
Formalin 
Kerosene 
Hills to the row 
Stalks to the row. .;.... 
Fertile stalks to the row 
329.5 
621 
412 
326 
641 
526 
328 
543 
505 
317 
545 
485 
282 
511 
439 
Thru an unfortunate failure of the tenant farmer controlling this 
field, I was disappointed in my original plan to harvest the plots sepa- 
rately, measuring and weighing the product of each in comparison, 
and the difiference in yield, apart from these differences in number, can 
only be inferred from Mr. Kelly's note of September 20, which reads : 
"The ears and the stalks in the checks were very small, much smaller 
than on any of the treated plots. The ears and stalks in plots treated 
with oil of lemon and carbolic acid were much larger than those in 
the other treated plots, and much larger than in the checks " 
GENERAL FINAL RESULT 
As a final statement of the most important result of the various 
treatments of seed-corn here described, it may be said that, according 
to the data of this experiment, the oil of lemon treatment increased 
the yield 1159 ear-bearing stalks to the acre; the carbolic acid treat- 
ment, 945 such stalks ; the formalin treatment, 742 ; and the kerosene 
treatment, 274. 
The expense of all the treatments was trifling, that of the most 
costly — the oil of lemon — amounting to about ten cents an acre for 
material used. 
Comparison of Infested Fields 
That the infestation of this field altho heavy enough to reduce 
the yield by at least one third, was not by any means extreme is shown 
by conditions reported by Mr. Kelly from a field of 20 acres on another 
farm near Elliot, as shown by an inspection made September 14. This 
latter field was so heavily infested by the corn root-aphis that the 
