19 
TABLE 2.—Showing the number of vines of the treated and untreated plats having fruit 
affected with black rot on June 22. 


\No. of vines 



Plat. | Kind of treatment. affected. 
| 
2 ACUNTIRERE SRG SIEADR eo eS ee eee 2 Te OR ee ene 4 | 
3 ge iia A Te ee ee er ee ee 13 
Pole eiiled earl eclentas oe ee eee re he Ee 4 | 
5 TWh att eRe a ee a eee ee eS St ae 14 
6 | Precipitated carbonate of copper solution -......-.----------- 9 
et RELIST TTR eo oe ee ee ee ee eee 16 | 
og) DOSE eR ee ee eee 4 
pu ONMR Tat te CMR fo hee en Re Cee Soe 16 | 
> 40,-) Gime mareture.----~_-2- - 5-5-2 ------ ae 5 5 esa -- = ons] 8 
il Ngy breAAMNORS S-~ 25S ns Seo as Soe sa soa see ee eee 18 
12 areas ESET Ee oot ees ein eee ee ee 9 
| 13 ie at aAW NAGE 2 ee Lee Se ee ee erm us hee 15 
per eee == aa Soe Wes wos eae eal e eee eee 8 
15 Wo Greapmens— sc. 225 2 52 a a at Stee Sere ae cases 15 
Lia. f Genpiermehirnip msebare. - 235-5052. 2. = 2-2 G2 2 - 3s 2 ek 7 
17 Da area OTR Sate ee eon Sats ana Sao ee Se ee ee me 17 
(ite (PETS Sror atin Se Te ee a eee ee 8 
ff 4) Pps Ser RS i oe oho ee So ese sae Sass 15 2 
Po od Sos ig OSGi pies. ----- 3-2-2245 LoL 2 Spe tay 14 
| 22 | Dy [Toy Sea TTC E Fca s S  e ee — e re | 18 
I | 

These figures show that of the 160 vines treated with the copper 
preparations 53, or 33 per cent, were showing signs of black rot on June 
22, Of the 160 untreated vines 134, or 83 per cent, were affected with 
rot. Out of 40 vines treated with the noncopper preparations 22, or 55 
per cent, were affected with rot, while out of 40 control vines 33, or 83 
per cent, were showing the disease. Representing this graphically we 
have the following, the dark portion indicating black rot, and the light 
freedom from the disease. 
D1aGRraM 4.—Showing the total number of vines in the treated and untreated plats, and 
the per cent of vines affected with black rot. 
EXPLANATION OF DIAGRAM 4. 
(1) One hundred and sixty vines treated with copper preparations. 
(2) One hundred and sixty vines which received no treatment. 
(3) Forty vines treated with noncopper preparations. 
(4) Forty vines not treated. 
Sixth treatment.—The sixth and last treatment was made on July 7, 
the weather at the time being damp and sultry. No marked change 
in regard to injury from the treatments took place between the fourth 
and sixth sprayings. 
At this time a countof all the clusters on both the treated and untreated 
plats was again made, and in order to get a definite idea as to the effects 
of the treatments the total number of clusters on each plat was ascer- 
