ERADICATING THE COMMON BARBERRY 23 
been cut down at least three times in different years, the last time 
being in the spring of 1922. (PL 12, A.) This had stimulated the 
production of many sprouts from both the crown and the injured 
lateral roots, resulting in thick clumps of considerable diameter and 
in scattered sprouts. Salt was applied October 28, 1922, in the man- 
ner heretofore described. (PL 11, B.) The costs were as follows: 
Salt, 42 hundredweight, at 75 cents $31. 50 
Freight and handling charges 8.95 
Labor, 8 man-hours at 50 cents 4. 00 
Team and wagon, 2 hours at 50 cents— 1. 00 
Total cost 45.45 
Number of bushes 300 
Salt per bush pounds 14 
Cost per bush $0. 15 
In August, 1923, this property was inspected. Nearly all of 
the barberries were dead; only two were found living where the 
grass around them was killed, indicating that salt had been applied. 
Thus, again, more than 99 per cent of the bushes were killed with 
salt. Several living sprouts were found showing no dead grass 
around them. (PL 13, A.) Some of these were only 6 inches from 
dead, treated plants, and when they were dug both living and dead 
sprouts were traced to the same root. These living sprouts had 
not developed subsequently to the treatment, but were there at the 
time and were overlooked. However, as they were but a few inches 
from a treated sprout, and as the two were attached to the same 
root, it might have been supposed that killing one would kill the 
other also, but this was not the case. For purposes of treatment, a 
barberry bush can not be considered a unit, but each separate shoot 
must be regarded as a separate entity. Iii other treatments and in 
observations on treatments made by many barberry eradicators this 
fact has been emphasized. Unless every shoot of a barberry clump 
receives some of the chemical, complete killing can not be expected. 
In an area near Huntley, 111., barberries were growing in a well- 
grazed, sodded, level, open wood lot of deep, rich soil where there 
was little undergrowth other than barberries. The bushes were very 
uniform in size, being about 2 feet in diameter at the base. In the fall 
of 1921 the owner had set fire to the accumulation of leaves about 
their bases, in an attempt to kill them, with the result that most of 
the old shoots were dead; but there was an abundance of new, vigor- 
ous shoots arising from each crown. The bushes were treated Oc- 
tober 31, 1922. ' The manner of application did not differ from the 
preceding except that a slightly smaller quantity of salt was used 
in proportion to the size of the bushes. The costs were as follows: 
Salt, 40 hundredweight, at 97% cents $39. 00 
Labor, 10 man-hours at 50 cents 5. 00 
Team and wagon, 2 hours at 50 cents 1. 00 
Total cost 45.00 
Number of bushes 200 
Salt per bush 1 pounds 20 
Cost per bush SO. 225 
An inspection of this area in June and again in September, 1923, 
disclosed that only 3 of the 200 treated bushes were not completely 
killed. This showed the treatment to be 98.5 per cent effective. Xot- 
