68 THE CONNECTICUT POMOLOGICAL SOCIETY. 



have the disease, but have not the symptoms well enough de- 

 veloped to show.it. Naturally, it has been difficult to try the 

 experiment with such pits. In the same way, yellows has 

 always been reproduced when buds have been grown from 

 diseased trees, and it would be a very careless nurseryman who 

 would take buds from trees visibly affected, but there still re- 

 mains the probability of reproduction in case the buds are 

 taken from trees diseased, but not yet sufficiently developed 

 to show. Smith demonstrated that buds taken from apparently 

 healthy sides of trees, having only otie side or one branch dis- 

 eased, developed the yellows. Apparently, therefore, we must 

 look with a certain amount of suspicion upon trees propagated 

 from buds taken from trees in yellows-infected districts or 

 from buds cut from a similar locality. 



Purchase of Nursery Stock. 



Since the yellows has such a wide hold on both 

 the commercial peach and nursery growing districts 

 in the Eastern United States, the purchase of peach 

 nursery stock then becomes quite a complicated question. I 

 have no doubt whatever but that millions of healthy trees are 

 propagated within the area occupied by the yellows. On the 

 contrary, I very much fear that yellows is occasionally propa- 

 gated in the nursery. It seems to me that there can hardly 

 be any doubt of this by the budding method, if not through 

 the pits. It looks as though, to be absolutely safe, one should 

 not only go outside the yellows area to purchase his peach 

 nurserv trees, but should make certain that the nurserymen 

 used pits grown outside of this area, and ,cnt his buds from 

 trees at least several years removed from infested localities. 

 It is a very grave question in my mind whether this is prac- 

 tical in all cases. I am certainly not prepared to take the 

 responsibihty of a wholesale condemnation of all the nursery 

 stock grown or now growing within the range of peach yel- 

 lows. I planted a block of 600 trees four years ago, pur- 

 chased from within this area and no yellows .developed in this 

 block. Another block planted out at the same time consisted 

 partlv of this same stock and partly of home grown trees. 



