28 
TABLE 11.—Showing condilion of fruit with respect torot in Vineyard 6, July 7. 




No. of 
Total No. of Ne. of diseased | Per cent 
Plat. Kind of treatment. No. of | perfect | #, ae ee or worth-| of perfect 
clusters. | clusters. a US" | Jess clus-| clusters. 
ers. ore 
ers. 
S| Nottreatmentien ace see- eee ee te eee 25 Gwe cen eae il 245> “| ee eae ee 
2 | Bordeaux mixture, full strength, early 
treavmMenthscfj-c ee ee eee 189 176 10 3 92 
3) lNowtineatment) sass) eeceees eee see seer 164 11 9 144 7 
4 | Bordeaux mixture, halfstrength, 2arly 
treatment. .---- CASI E Te eee EN 188 130 1 7 92 
bys Nosmeaitmentesee a-— aeeee eomeee er 151 18 17 116 ib 
6 Bordeaux mixture, full strength, late 
treatments; 3 sprayings.-......-... 212 54 68 100 25 
ion Pe NOwine aime nee ses ea eee 132 4 12 116 3 
8 | Bordeaux mixture, half strength. late 
treaiments; 3 sprayings..-....-..... 188 i 60 46 4] 
OD) No wreatment)2 Stee see eee teers a eee 75 10 15 50: 26 
10 | Bordeaux mixture, fullstrength, early 
treatments; 4 sprayings..---:...---- 3 84 Yo Wesesoshese 90 
Date Nombre atmenitye sere: sees 142 10 43 89 7 
12 Bordeaux mixture, full strength, late 
treatments; 3 sprayings..-...-.....| 109 30 37 42 27 
13}. (|) AO Wee InIG so5 oboe Soeea doe conos sabe 120 5 23 92 4 
14 | Bordeaux mixture, half strength, early 
treatments; 4sprayings..--..---... 106 96 9 1 90 
15s PNOsbreatmenivers tas eeee oer eres 137 5 21 111 3 
16 | Bordeaux mixture, half strength, late 
treatments; 3 sprayings -.-:........ 140 36 61 41 25 




The very striking results of the experiment are brought out so clearly 
in the table that little further upon this part of the subject need be 
said. By comparing the figures of this table with those of the pre- 
ceding it will be seen, first, that there was an enormous increase of 
black rot during the month elapsing between June 9 and July 7. The 
table shows the great importance of early treatment. Another im- 
portant matter brought out is that there was, so far as preventing rot 
is concerned, practically no difference between the Bordeaux mixture 
full and half strength when applied early. The difference between the 
plats treated with full and half strength four and six times, is certainly 
not sufficient to pay for the time and trouble in making the additional 
sprayings. 
Arranged in the order of their effectiveness the various treatments 
stand as follows: 
(1) Bordeaux mixture, full strength, early—six sprayings, April 27, May 13, 25, 
June 9,:22, and: July’ (. 22222 322. Sere ae ee eee 92 
(2) Bordeaux mixture, half strength, early—six sprayings, same as 1_-.-.......-. 91 
(3) Bordeaux mixture, full strength, early—four sprayings, April 27, May 13, 22, 
JUNG Oi 2 Goce eke Soe ci pee as Cee re er ee eee a ee 91 
(4) Bordeaux mixture, half strength, early—four sprayings, same as 3......---- 90 
(5) Bordeaux mixture, half strength, late—three sprayings, June9,22,and July7. 41 
(6) Bordeaux mixture, half strength, late—three sprayings, same as 5...--.---- 25 
On July 10, three days after the last treatment, a representative 
cluster was cat from each vine of plats 2, 4, 6, and 8 treated, and plats 
5, 7, 11, and 15 untreated. All the rotten berries were removed from 
these clusters, after which the latter were photographed. The illus- 
trations made from these photographs are shown in Plates I and Il. 
