CAUSE AND NATURE OF CROWN-GALL 13 



tain the prevalence of crown-gall in various parts of the country 

 and what experiments had been made regarding it : 



Tucson, Arizona, October 25, i8gy. 

 Dear Sir : In giving some study to the crown-gall, I desire 

 to know something in regard to its distribution and the work 

 that has been done or is being done upon it at other stations. 

 If prevalent in your State, will you kindly inform me what 

 plants it is found infesting, and what has been done to counter- 

 act its injury. I will be pleased to receive anything that you 

 have published on the subject. 

 Very respectfully, 

 (Signed) J. W. Toumey. 



The replies received indicate that the disease was known 

 and considered of more or less injury in the following States : 

 New York, Connecticut, Massachusetts, New Jersey, Pennsyl- 

 vania, North Carolina, South Carolina, Alabama, Florida, 

 Georgia, Mississippi, Ohio, Michigan, Wisconsin, Iowa, Mis- 

 souri, Nebraska, New Mexico, Arizona, California, Oregon, 

 and Utah. Its widespread dissemination has been more fully 

 recognized during the past two years, and without doubt it is 

 now known in most of the other States. 



SOME STATEMENTS OF OTHER OBSERVERS REGARDING 

 CROWN-GALL. 



The following excerpts taken from letters of various corre- 

 spondents give a general expression regarding the disease 

 throughout the country : 



" Crown-gall is quite widely disseminated in Florida, but is 

 not severe in fields generally. In new land it is almost or quite 

 unknown, but upon old land that has been farmed indiscrimi- 

 nately trees are often badly affected with this disease. We find 

 it most severe on peach trees." — P. H. Rolfs. 



" Crown-gall is not doing much damage in Missouri, so far 

 as I know. I have seen it on a few apple trees in the nursery, 

 but it was not severe enough to impair their growth." — J. C. 



W MITTEN. 



"The crown-gall is quite widely distributed in the eastern 

 States. I do not hear of it to any great extent elsewhere. 

 However, I recall that peach-growers have complained of this 



