PEACH VARIETIES IN RELATION TO CURL. 



195 



Besides the facts respecting the luirdiness of varieties gathered by a 

 circular letter addressed to the peach growers of the country in 18J>8, 

 the following list contains such information on this subject as it has 

 been possible to glean from the publications accessible to the writer. 

 In this list are tabulated 191 peach varieties and a few nectarines in 

 relation to their resistance to curl. So far as possible the form of the 

 glands, the season of ripening, and the adhesion of pit is shown. ^ The 

 susceptibility to curl is shown in three colunnis — little susceptible, 

 medium susceptible, and very susceptible. Ever}' record for or against 

 a variety has been obtained from a distinct source from all other 

 records for that variety, and the list includes over 1,000 records. As 

 a record under medium suscepti])le or very susceptible is against the 

 variety, showing that it is subject to the disease, these two columns 

 are added and the sum carried to a final column. This final column 

 may thus be fairly contrasted with the first column, which gives the 

 records of varieties little susceptible to curl. The entire list goes far 

 to show that few varieties are practically free from curl in all locali- 

 ties, and that some of the finest varieties are very susceptible to it. 

 (See for example the records under Crawfords Late, Crawfords Early, 

 Elberta, Heath Cling, Lovell, etc.) 



Table 43. — Relations of peach varieties to peach leaf curl, with records of glands, time of 



ripening, and adhesion of pit. 



^In some instances it is known that the form of the glands of a variety is reported 

 differently by different writers, and on this account a few errors may have crejjt into 

 the table here given, but where it has been possible to determine such questions by 

 referring to several authors it has been done. Unfortunately the writer has not been 

 able to study this matter in the orchard except for a portion of the varieties given. 



