70 STATK POMOLOGIOAL SOCIETY. 



APPLE SCAB. 



But one of our correspondents — Mr. Henry Smith of Monmouth 

 - had attempted the use of an}^ of the copper compounds to check 

 the apple scab. Some have had little trouble from this source, and 

 one thought he had derived benefit from the use of London Purple. 

 I should question the aecurac}' of the last observation, however, as 

 London Purple, being an impure arsenite of lime, does not contain 

 the elements usually considered of value in this connection. Mr. 

 Smith has sprayed for two or three seasons with Bordeaux mixture 

 — four pounds lime, six pounds Copper Sulphate and thirty gallons 

 vvater — and is fully convinced of the value of the treatment. From 

 his former experience, Mr. Smith was so well satisfied with the 

 effectiveness of the spraying, that he left few checks this year. In 

 one orchard, however, two rows of Nodhea«ls were sprayed, afttr 

 bloom, with Bordeaux mixture and Paris Green. As to the result 

 Mr. Smith writes: ''From those two rows I gathered the finest 

 specimens I ever raised — large, bright and free from scab and 

 worms ; while two trees not sprayed were, I think, as bad as any I 

 ever saw — gnarly, scabby and almost worthless." 



Our own work in connection with this subject was, in some 

 respects, less satisfactory'^ than last year ; but in a general way the 

 results are very encouraging. The work was conducted on the 

 same general lines as last year, both Mr. Pope of Manchester and 

 Mr. Moore of Winthrop co-operating. The season was very 

 unfavorable and it was difficult to find a suitable time for the work. 

 In neaily every instance rain fell within twenty-four hours after the 

 spraying was finished, and as a consequence the results were mate- 

 rially affected. 



Mr. Moore's orchard is usually very badly attacked and would 

 seem to be an excellent field for work. Many of the trees bore 

 very heavily in 1891, however, and were not as well adapted for 

 our use as they otherwise would have been, as trees bearing but little 

 fruit are seldom attacked so badly as those which are heavily 

 loaded. 



Two solutions were used in Mr. Moore's orchard — the ammonia- 

 cal solution of copper carbonate, recommended last year, and the 

 "improved" ammonia-copper carbonate solution suggested by 

 Professor Galloway. 



The first of these, which we will call solution A, consisted of five 

 ounces carbonate of copper, three pints strong ammonia, fifty gal- 



