245 
G treatments; Bordeaux, .5 treatments; ammoniacal solution, 6 treat¬ 
ments; ammonlacal solution, 5 treatments. Five treatments with the 
ammoniacal solution proved almost entirely ineffectual. Plate xxiii 
shows the average of stocks treated G times with ammoniacal solution. 
JAPAN PEAR STOCKS. 
1891 .—One row of 4GG stocks was planted in a manner precisely sim¬ 
ilar to that described for the French stocks. The dates of treatment 
were as above given, one half the treated portion receiving three treat¬ 
ments and the other seven, one-lialf being treated with Bordeaux, the 
other with ammoniacal solution. The results obtained were striking, 
as illustrated by the following notes on the re-leaved stocks: 
Table 3. —Showing number of Japan stocks forced to put out new leaves.. 
Number and treatment of stocks. 
Total No. 
re leaved. 
Per cent 
re-leaved. 
87 stocks treated 7 times with Bordeaux. 
1 
1.1 
88 stocks treated 3 times with Bordeaux. 
21 
23.8 
87 stocks treated 7 times with ammoniacal solution. 
15 
17.2 
90 stocks treated 3 times with ammoniacal solution. 
9 
10.0 
114 stocks untreated. . 
47 
41.2 
The average diameter of the stocks near the collar was not percepti¬ 
bly greater in the treated than in the untreated, the average differ¬ 
ence amounting to less than one thirty-second of an inch. The un¬ 
treated Japan stocks suffered more from the disease than the untreated 
French stocks. 
1892 .—The same row of stocks as that employed the previous season 
was treated, but one-half or more of the stocks were budded in 1891, 
as described subsequently on pp. 259, 2G1. The treatments given were 
as described on pp. 262-263. As early as June 24 the unbudded stocks, 
which had not been treated, showed the disease plainly, every stock 
being affected. At this date it was evident that the Japan stocks, as 
introduced from the south, were more susceptible to leaf-blight than the 
imported French or the native-grown American stocks. The latter were 
at this date scarcely affected by the disease. From the two years’ ex¬ 
periments upon Japan stocks from Franklin Davis & Co.’s nurseries it 
seems probable that these when imported from the South will not show 
any greater immunity from leaf-blight than the French or American 
stocks. A more extended experiment, however, is needed to settle this 
point. The result of treatments with fungicides was as striking as that 
gained from the French stocks. The foliage on the budded stocks re¬ 
mained reasonably free from the disease until quite late in September 
when the stocks in the untreated portions began to drop their leaves 
badly; those treated 6 times with Bordeaux held their leaves almost 
intact. The Bordeaux proved in general more efficacious than the am¬ 
moniacal solution in the treatment of both budded and unbudded stocks, 
