554 FUNDAMENTALS OF FRUIT PRODUCTION 



peach root; on the ahnond the last two take well but the first is again 

 refractory. '24 'pj^g Yellow Egg, Jefferson and Washington plums also 

 lack affinity for peach roots. 1^4 Wiskeri^^ g^^j^g Diamond and Grand 

 Duke to this list. Sugar, mentioned above as failing on peach, succeeds 

 on apricot, while the French prune fails on the latter stock. ^^ 



Swingle'^" calls attention to the lack of compatibility between the 

 Satsuma orange and the sour orange stock. On the sweet orange, growth 

 is satisfactory but the fruit is poor; by far the best results are secured on 

 trifoliate stock. The kumquat unites with the sour orange but dies 

 after starting growth, though on trifoliate stock it gives very satis- 

 factory results. Bonns^'' reported the trifoliate to be distinctly dwarfing 

 for lemon, much more so than for orange. 



Apple varieties show various degrees of congeniality with dwarfing 

 stocks. Hedrick^^ reported Mcintosh, Wealthy and Lady to be the most 

 congenial of a large number of varieties tested, and Jonathan, Esopus, 

 Grimes, Alexander, Wagener, Boiken and Bismark as "very satisfactory." 

 Baldwin, Rhode Island, Rome, Ben Davis and Northern Spy were uncon- 

 genial and Twenty Ounce gave the poorest results. 



Mclntosh^^^ is said to make a strong growth as a young tree on cion- 

 rooted Transcendent Crab, though Red Astrachan is markedly dwarfed 

 on the same stock. 



Maynard'"^ described a case which may be considered to have a 

 bearing on the present question. It was reported as follows: "About 

 10 years ago six small trees of yellow Siberian crab and three of Williams' 

 Favorite were planted as represented in the following diagram, S indicat- 

 ing Siberian crab, S.B. the same budded and W Williams' Favorite; 



S W S.B. S W S.B. S W S.B. 



"The trees were all of the same size as nearly as could be selected 

 and every third tree in the row was top-budded with the Williams' 

 Favorite. The buds all grew well the first season, but the subsequent 

 growth was very little and at the end of 10 years all were dead. The 

 diameters of the three Siberian crabs were 4, 4}-^ and 6 inches, of the three 

 Williams' Favorite 3%, 3 and 3 inches, while none of the budded trees 

 reached over % of an inch." It is difficult to decide whether this is a 

 case where the cion influences stock or stock influences cion but the fact 

 is worthy of record here. 



Reciprocal or inverse grafts are not always equally successful. This 

 may be due in part to lack of adaptability rather than to a lack of affinity, 

 but there appears at times to be a real lack of congeniality in a graft 

 whose opposite is congenial. In some of Daniel's work the grafts of 

 pimento on tomato seemed rather less successful than those of tomato on 

 pimento.^^ Sahut'^'' states that the Mahaleb succeeds as a cion on no 

 other cherry though it is the standard stock for the sour cherry in America 



