14 



Amygdalus persica, peach. (N, S) 



McClintock 1922-24 (145, 146, 14?') '■ Seeds gathered in 1918 from a tree of 



considerable age, near Tallahassee, Fla.; seedlings grown in Georgia 



practically free from knots. A large percentage of second-generation 



seedlings [grown in Tennessee (?)] were free from knots. 



Var. Australian Saucer. 



Tufts 1930 (333) : Somewhat resistant in California tests, but far behind 



Shalil. The Saucer type has been "credited with resistance." 

 and Day 1934 (23 A) : Infestation moderate. California. 



Var. Bell October. 



Tufts and Day 1934 (234): Infestation light (tentative rating). Cali- 

 fornia. 



Var. Bokhara. 



Tufts 1930 (233): No knots found on 25 seedlings out of 27 (1 season). 

 California. 



and Day 1934 (234) '• No visible infestation on nursery seedlings (3 



years) but results not conclusive; a few knots found in heavily infested 

 soil in orchard. [Data in letter, 1939: 701 seedlings 1 to 5 years old in 

 several orchard plots, 21.4 percent "affected."] California. 



Var. Early Wheeler. 



Tufts and Day 1934 (234): No visible infestation (preliminary test). Cali- 

 fornia. 



Vars. Honey and Lewkins Honey [same as Lukens Hone} 7 ]. 



Tufts 1930 (233): The Honey type has been "credited with resistance." In 

 California tests, both varieties appeared somewhat resistant but fell 

 far behind Shalil. 



and Day 1934 (234): Infestation moderate on both varieties. Cali- 

 fornia. 



P. I. No. 41395 [dwarf peach, from Swatow, China]. 



Tufts and Day 1934 (234): No visible infestation (preliminary test). Cali- 

 fornia. 



P. I. No. 61302 [Bolivian Cling peach X Quetta nectarine]. 



Hutchins 1937 (114): Vigorous understock; roots have remained entirely 



free from infestation (tested since 1928). Georgia. 

 Tufts and Dat (California station; in letter, L. H. Day, 1939): 236 seed- 

 lings in nursery in 1938, 23.3 percent "affected." 



Selection "Purple Leaf" [from wild seedlings received from New Jersey station]. 

 United States Bureau of Plant Industry 1938 (238) : "Complete im- 

 munity from attack" in parent trees and in a large planting of 1-year 

 seedlings; growth vigorous (tested 4 years). [Subsequent observation 

 by the Division of Fruit and Vegetable Crops and Diseases has indi- 

 cated that this stock is susceptible to attack.] 



Shalil selections. 



Day, L. H. (in 1937 revision of California Circular 330 (236, -p. 32)) : Seed- 

 lings of P. I. No. 36485 are perhaps the most resistant of the peaches 

 tested. California. 



Hutchins 1937 (114): Seedlings from P. I. No. 63850 are completely resist- 

 ant (tested in Georgia since 1928); vigorous as understock; trees for 

 seed production should be propagated in direct clonal line from the 

 original tree at Chico, Calif. 



Tufts and Day 1934 (23 L) : No visible infestation in nursery on seedlings 

 from P. I. Nos. 36485, 63850, and 63851 (3 years) ; 2 suspected knots 

 on a Shalil seedling in orchard. [Data in letter, 1939: Of 62 seedlings, 

 No. 63850 ("syn. 36485"), in nursery in 1938, 24.2 percent were "affected." 

 Seedlings 1 to 5 vears old, in several orchard plots: 326 seedlings of No. 

 63850, 19.6 percent "affected"; 337 seedlings of No. 63851, 9.79 percent 

 "affected"; 82 seedlings of No. 63852, 9.75 percent "affected."] Cali- 

 fornia. 



Var. Smith. 



Tufts and Day 1934 (234): Infestation light (tentative rating). California. 



Var. Sutter Creek. 



Tufts and Day 1934 (234): Infestation light (tentative rating). California. 



