February, ’24] Glasgow & gloyer: mercuric treatment for cabbage 99 
omitted. This operation was repeated at intervals of approximately 
one week until all five applications were made, one new plat being added 
and one row successively dropped from each of the preceding plats at 
each application. At the end of this five-weeks period, we therefore have 
fifteen different combinations bearing on the time and frequency with 
which each of the materials tested may be applied. The mercuric 
chloride, as in most of the other tests, was used at the standard concen¬ 
tration of 1 ounce to 10 gallons of water, the resulting solution being 
applied by means of a watering pot from which the rose sprinkler had 
Table 3. Relation of Time and Number of Applications of Mercuric Chlo¬ 
ride Acid Solution to Maggot Control and to the Development of Rhizoctonia 
in Cabbage Seed-Beds (Mercuric chloride acid stock solution used at rate 
OF 1 OUNCE TO 10 GALLONS WATER) 
Plat 
Row 
Number of 
applications 
per row 
Date of Number of 
final plants 
application counted 
Percentage Percentage 
injured by diseased 
maggot 
1 
1 
1 
5-25 
221 
19.90 
7.24 
1 
2 
2 
6-1 
230 
9.13 
5.65 
1 
3 
3 
6-9 
187 
0.00 
1.66 
1 
4 
4 
6-16 
203 
0.00 
0.49 
1 
5 
5 
6-23 
204 
0.00 
0.98 
2 
6 
1 
6-1 
264 
27.65 
4.16 
2 
7 
2 
6-9 
250 
21.60 
3.60 
2 
8 
3 
6-H> 
249 
7.63 
3.21 
2 
9 
4 
6-23 
276 
14.85 
2.53 
3 
10 
1 
6-9 
253 
20.15 
8.30 
3 
11 
2 
6-16 
310 
25.80 
10.32 
3 
12 
3 
6-23 
321 
22.74 
9.34 
4 
13 
1 
6-16 
288 
48.26 
6.25 
4 
14 
2 
6-23 
255 
55.68 
7.84 
5 
15 
1 
6-23 
316 
45-25 
13.29 
Check 
No treatment 
732 
66.66 
15.84 
been removed so that the liquid could be directed along the row in a 
solid stream. The amount used in this case averaged about 1 gallon to 
from 20 to 40 feet of row, depending on the age of the plants, the quan¬ 
tity varying as the plants increased in size. This amount was found to 
moisten the soil about the plants to a depth of from ^ to 2 inches, de¬ 
pending on the physical make-up of the soil, the type of cultivation 
practiced and the moisture content. No attempt was made to reach to 
the entire depth of the root system in the older plants as this would have 
required an excessive amount of the solution. From this table it appears 
