6 



BULLETIN 162, U. S. DEPARTMENT OF AGRICULTURE. 



There still remains much to be clone in testing these adapted varie- 

 ties on different stocks. The few experiments made so far indicate 

 that this is a very promising direction for experimentation. 



It seems certain that some of the seedlings selected from among the 

 Spanish or Mexican sorts will prove more immune to chlorosis and 

 generally better adapted to the conditions than the seedling stock 

 ordinarily used by nurserymen. The newly introduced Chinese wild 

 peach (Amygdalus davidiana) also gives promise of a high degree of 

 immunity to the local soil difficulties. It remains to be shown just 





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Fig. 2. — A tree of the Honey peach, one of the most reliable for the San Antonio section. This tree 

 is located in the variety-testing orchard in field A-l. Although the trees in this orchard are planted 

 closer together than is desirable for commercialplantings and the orchard has never been irrigated , the 

 trees have made a good growth and some of the varieties have fruited abundantly. (Photographed 

 June 25, 1912.) 



how much can be gained by working some of the more desirable but 

 susceptible varieties on these resistant stocks. 



In the variety test here reported no special stocks have been used. 

 The trees in the test were purchased from commercial nurseries in 

 Texas and the northern part of Florida and were presumably budded 

 upon the seedling stocks in ordinary use in those nurseries. 



In this test the trees of 30 varieties were set in January, 1906, and 

 5 varieties were set in March of the following year. Two trees of each 

 variety were planted and the orchard has been given thorough, clean 

 cultivation, except for the plowing under of a winter crop of Canada 



