20 
tained, and three divisions were made of them. The first, classified 
as perfect clusters, contained from 1 to 5 diseased berries; the second, 
classified as part-perfect clusters, contained from 5 to 10 diseased ber- 
ries; while the third, classified as diseased or worthless clusters, con- 
tained 10 or more diseased berries. 
These observations enabled us to determine, (1) the total number of 
clusters on the treated and untreated vines; (2) the total number on 
each plat; (3) the total number of clusters lost from June 9 to July 7; 
(4) the number of clusters on each plat lost during the same period; 
(5) the total number of clusters, and the number on each plat practi- 
cally free from disease; (6) the total number of clusters, and the num- 
ber on each plat slightly affected; and finally (7) the total number and 
the number on each plat destroyed or rendered worthless by the rot. 
The results of this count are set forth in the accompanying tables: 
TABLE 3.—Showing the total number of clusters on the vines June 9 and July 7, respec- 
tively, and the total number and the per cent lost between these dates. 






| 
Number Number nee cane lost 
of clusters | of clusters 5 Be pe 
June 9. July 7. July 7. 
ETnGaAved esse ra See ees Seiase wee oe be eee ee 3,540 3, 116 11.9 
Untreated: so. see eee eee eee eee 3, 253 2,978 8.4 
ROG ee ae kas AE ee oe eo ees 6, 793 6, 094 


In regard to this loss, we know from careful observations made during 
the month elapsing between June 9 and July 7, that it was not due to rot 
orany disease. Many of theclusters which consisted of nothing but old 
flowers, merely shriveled up and fell off. This partial shedding of the fruit 
seemed to be normal, the whole vineyard and other vineyards in the 
vicinity and elsewhere being affected in the same manner. Inasmuch, 
therefore, as we are principally concerned with the effects of black rot 
we need only consider the actual state of the vineyard with respect to 
this disease on July 7, at which time it is safe to say that every cluster 
injured by rot still remained on the vine. 
