TWENTY FIRST ANNUAL MEETING. 55 



Mr. N. Atwell of Lawton: I have seen a pathway of yellows where 

 a diseased tree had been drawn out through an orchard. 



Mr. Stearns: I have drawn out dry trees with no bad results. 



Mr. Morrill : Has Mr. Smith determined the time of contagion, the 

 time when the principle of contagion is active? 



Mr. W. A. Taylor: I can not answer fully as to that; but buds set at 

 or near the close of the season of growth, have caused yellows in the stock 

 below, even when the bud itself did not grow. There is possibility of the 

 disease remaining dormant two years and then developing. 



Mr. Morrill : Then it is never safe to prune a suspected tree and go 

 to others without disinfecting the knife. 



Mr. Taylor: I do not think Mr. Smith has case's of communication by 

 saw and knife, but it is quite possible for the disease to be spread by that 

 means; and it is easy to disinfect tools with carbolic acid. The Califor- 

 nians are fearful of receiving yellows through eastern trees, and are 

 guarding against it; but, though many carloads of such trees have been 

 received and planted there, no case of yellows has yet developed. 



Mr. J. F. Taylor of Douglas: In view of the experience of those who 

 have done most cutting, it is evident that yellows may be so checked as to 

 be kept back beyond the line of serious danger. After the notable epi- 

 demic of the disease in 1879, cutting of trees was very general and there 

 has not been much of the disease since. I do not want in my orchard a 

 tree with disease of any kind. Peach trees are the cheapest of all nursery 

 stock and so there is no incentive to keep unhealthy ones about. Root them 

 out and plant anew. If one cuts promptly all suspected trees he will have 

 little trouble from yellows. In my vicinity there is no fear of i t. 



Mr. W. A. Taylor, in reply to a question: Mr. Smith's experiments 

 have been conducted in Michigan, Maryland, Delaware, and Georgia. 



Mr. J. F. Taylor: It would be well to try experiments of inoculation of 

 yellows in regions where the disease does not exist. 



Mr. W. A. Taylor: There is no yellows about Hubbardston, where some 

 of Mr. Smith's experiments are conducted upon his father's farm. 



Mr. Morrill : In Mr. Smith's report, in this society's Report for 1888. 

 there is an illustration of a disease he found in Georgia, which he pre- 

 sumed to be different from yellows. Was it in fact the disease called 

 " rosette " by Mr Taylor in the paper just read? 



Mr. W. A. Taylor: It is. 



Mr. Morrill: I saw something at Judsonia, Arkansas, four or five 

 years ago, of which that illustration reminded me. 



Mr. C. A. Hawley of Shelby, to Mr. Morrill: Are you now growing 

 peach trees where yellows had destroyed those previously planted? 



