10 N.J. Agricultural Experiment Stations Bulletin 356 



In 1888 Smith 1 also showed by diagram the results of studies of yel- 

 lows in several orchards in Delaware at the time of an outbreak. 

 In the orchard of Joseph McDaniels at Dover, Delaware, set in 





Fig. 4. — An Elberta Tree in Full Bearing With One Central 



Branch Affected With Yellows. Note the Thin and Rolled 



Appearance of the Foliage on This Branch 



1884, he reports 887 trees out of a total of 1,777, or about 50 per 

 cent, affected with yellows in 1887. In another orchard belonging to 

 J. Frank Denney, out of a total of 2,146 trees set in 1881 only 130 

 were found to be healthy in 1887. Some orchards showed much 

 smaller losses but these illustrate the seriousness of the disease. 



