34 



diseases or insect pests. Those trees which had been poorly- 

 pruned are listed under "stubs." Those badly infected with 

 heart rots from other causes than topping and those that had 

 been topped are listed separately. Under the heading "tip burn" 

 have been placed all those that showed sunburn, heat scald, etc. 

 Under the heading "other diseases" have been listed all those 

 showing the effects of diseases other than rots. 



Summary 



Trees in the City of Danville, Illinois, were examined in 

 1934 for physical defects and diseases. Only 59% of the entire 

 tree population, 18,700, which was more than one tree to every 

 two persons, were healthy and 38% were in dire need of care. 

 Three per cent were dead at the time of the survey and more 

 elms have died since. This death of elms has been attributed to 

 a group of causes including drouth and disease. All of the trees 

 have been subjected to the unhealthy condition of the city and 

 most of them are showing the effects of this. 



Urbana, Illixois 



