18 
At this time it was deemed advisable to determine the amount of 
fruit on all the vines in the experimental block. Accordingly the num- 
ber of clusters on each vine was counted, and from this the following 
data were obtained: 
TABLE 1.—Showing the total number of healthy grape clusters on each plat June 9; also 
the average number of clusters per vine. 


r Average No. 
Plat Kind of treatment. o ae x o: of clusters 
Arey aa per vine. 
2 zAmmoniacal solmtionssesesee eee eee 376 18. 80 
3h Notreabmentinass-5 seca e eee ons oer Bekele ele 385 19. 25 
4) Mioditiedteaurceleste® ae=s- ere ee eee eee 371 18. 55+ 
5 MNO LOLeAbM CMG ee eee Se ee eae 355 Nieiors 
6 | Precipitated carbonate of copper solution. -.. 323 16.15++ 
| ANION Bo sscods sob oocecosnesseSsqao~ 85 324 16. 20 
Sua Copper saccharatererae ss seneae ne eer ee 360 18. 00 
Se Notreatm ents. soee eee tee coe eee eee O55 367 18. 35 
We) || Cue Tbs soso s sees sosccssossocsneesses52 381 19. 05-4 
1h IANO ie BURN) Sess 6 shoes costoes See osoqcceuoos 330 16. 50+ 
12a eB Orde allxs MEXGULC ssa- vise oan meee ee see 416 20. 80 
BY IN OMeR NG he eee Ro SREB ene de ee Copoe= = 285 14.25 
4s Copperacetat@ spac as =n oe eee eee 361 18. 054 
15S) No treatment) 222 -c2 sos = eit ec eee 382 19.10 
Gen | aCopperich) orid enmitunG see. e eae 342 17.10 
if: Al Nojreabment 25: 35255 ee Se eran ae eee et 329 16. 45 
18 | Potassium sulphide solution.......----...--- 417 20. 85 
19)-s | PNotreatmentice eee secre eee Nahi Sapte, ahs 316 15. 80 
20221) Sodiumhy posulphitemec. = s-se- eee ae ese | 193 9. 65 
22 | INo treatment: 2-c2snc- Ge ec oe see as oe Soe 180 9. 00 



It will be seen from the foregoing figures that 6,793 clusters of grapes 
free from black rot were on the vines June 9. Three thousand five 
hundred and forty of these were on the treated vines, while 3,253 were 
on the untreated. In other words, up to the time these observations 
were made there was practically no difference, so far as the number of 
clusters was concerned, between the treated and untreated plats. 
Fifth treatment.—On June 22 the fifth treatment was made, the 
weather at the time being wet, a heavy rain having fallen on the 21st. 
The vines in most of the vineyards were growing vigorously, their con- 
dition in this respect being about the same as when the last spraying 
was made. Asregards injury to the vines as a result of the treatment, 
no change took place since the last spraying. Black rot, however, was 
found to be greatly on the increase, many of the berries showing its 
effects. It being impracticable to accurately estimate the amount of 
injury to the berries from this cause, the fruit on each plat was care- 
fully inspected and twodivisions made of it. In the first division were 
placed all vines whose fruit was wholly free from rot, while to the 
second were referred all vines whose fruit showed the disease. The in- 
formation thus obtained is set forth in the accompanying table: 
