33 
ONE WINTER AND ONE SPRING TREATMENT. 
TABLE 15.—Showing the manner, number, and dates of treatment for apple scab—Cont’d. 




pee ie ae a Sprayed with— Date when sprayed. 
11-12 | 2 | Ammoniacal copper carbonate, London purple. .--..----..---| Mar. 23, May 1. 
13-14 2 | Suspended copper carbonate, London purple..........---.-.--- Do. 
15-16 2 | Bordeaux mixture, London’ purple..-.:..-2.. 2. .----....---.-<- | Do. 


ONE SPRING AND THREE SUMMER TREATMENTS. 
17-18 4 | Ammoniacal copper carbonate, London purple...-....-....--- May 1, June 15, June 
26, July 14. 
19-20 4 | Suspended copper carbonate, London purple-..-..-....------... Do. 
21-22 Ao) Bordeanxmirxoure, Ondon purple <2. me ..6-a esses essece ss Do. 

ONE WINTER AND THREE SUMMER TREATMENTS. 

23-24 4 | Kerosene and London yg (4 ya SS a Se ee aR March 23, June 15, 
June 26, July 14, 
D 
25-26 4 ATIS enOOi se acs css ae elsinic eisis sm einnis mia slo pis aie ials s c's ote gos 0. 

ONE WINTER, ONE SPRING, AND THREE SUMMER TREATMENTS. 

27-28 5 | Ammoniacal copper carbonate, London purple.......-...-.--. March 23, May 1, June 
| 15, June 26, July 14. 
29-30 5 | Suspended copper carbonate, London purple...---.-.---.----- Do. 
31-32 5 | Bordeaux mixture, London purple... :.-...-...-.-..--s6.65- Do. 

CHECK—NOT TREATED. 


A severe drought prevailed during the months of August and Sep- 
tember, causing the apples to mature earlier than usual. The early 
part of the season was also exceptionally dry, in consequence of which 
very little scab developed. 
On September 10 to 12, inclusive, the entire crop from all the trees 
constituting the experiment was gathered and sorted into three quali- 
ties with reference to the amount of scab, as follows: 
First quality: Fruits absolutely free from scab. 
Second quality: Fruits showing scab spots, but not of sufficient 
size or number to distort the apples. 
Third quality: Fruits more affected. 
The data relating to the experiment are chiefly grouped in the fol- 
lowing table. To render the data more intelligible, the average results 
of the two duplicate trees submitted to each treatment are graphically 
illustrated in Plate I11. 
4816—No, 3——3 
