

LIME-SULPHUR PREPARATIONS FOR APPLE DISEASES. tt 
cially plat 2, began to show considerable foliage injury after the second 
application, and on this account the solution was diluted to contain 
only 1 gallon in 40 gallons of water for the last two sprayings. 
RESULTS OF THE TREATMENT. 
Soon after the second application was made, according to 
Mr. Braucher’s notes, the commercial lime-sulphur plats began to 
show foliage injury. Notes made at intervals during the season 
show that the foliage was quite badly injured by the lime-sulphur 
solution and Paris green combination and that the solution without 
an arsenical caused almost as much damage, while the same solution 
with arsenate of lead was much lessinjurious. Although the damage 
caused by the lme-sulphur and arsenate of lead combination was 
not severe, it was sufficient to discourage the use of the solution 
at the strength of 2 gallons to 50 gallons of water. <A strength of 
14 gallons to 50 gallons of water, with arsenate of lead, proved to 
be practically noninjurious in Virginia and would probably be safe 
in Michigan. The self-boiled lime-sulphur mixture with arsenate of 
lead caused no damage whatever. 
The following table shows the efficiency of the several spray mix- 
tures in preventing apple scab on the Wagener variety, as determined 
by sorting and counting the fruit from eight trees in each plat: 
TaBLeE I1.—Comparison of results of the use of lime-sulphur sprays with Bordeaux mixture 
im the prevention of scab on Wagener apples at Douglas, Mich. 

| Scabby 

ace Spray mixture used. fruit. 
| Per cent. 
ie eComimerciallime-sulphur solution (2:40.50) -2.5.. 5.2.2.2 552k oe ee ek ee vee ae oe Sede 6. 37 
2 | Commercial lime-sulphur solution (2 to 50) and 6 ounces of Paris green. .__.-.---------- Dae 
3 | Commercial lime-sulphur solution (2 to 50) and 2 pounds of arsenate of lead - . -..------- 3. 96 
4 | Self-boiled lime-sulphur solution (10-10-50) and 2 pounds of arsenate of lead. ..-.-.--.----. 19. 48 
5 | Bordeaux mixture (3-4-50) and 2 pounds of arsenate of lead. ......-.-.-.--------------- 3. 43 
6 
CnaGlS: HOP SOAEG! | Ses ONS SS ae ae ee a ene 81.18 

As shown in the above table, the scab was held down to an average 
of 4.2 per cent of the crop by the commercial lime-sulphur solution, 
to 3.43 per cent by the Bordeaux mixture, and to 19.48 per cent by the 
self-boiled mixture, while 81 per cent of the unsprayed fruit was 
scabby. (See Pl. III.) This experiment, as well as those conducted 
in Virginia, shows that the lime-sulphur solution is as effective in 
preventing apple scab as Bordeaux mixture, while the self-boiled 
wash is not so good in this connection. The arsenate of lead in the 
commercial lime-sulphur solution held the codling moth down to 1.6 
per cent of the crop and in the case of Bordeaux mixture to 5.6 per 
cent, thus indicating that the lime-sulphur does not injuriously affect 
the poison. 
[Cir. 54] 
