New York Agricultural Experiment Station. ISl 



The orchard contains quite a variety of soils and yet the disease 

 is equally destructive in all parts; so it does not seem to be 

 wholly a question of soil. We should su>spect the trouble due 

 to imperfect union of stock and bud were it not for the fact that 

 some trees of the same lot were planted at Lodi and have there 

 done well. Perhaps it is brought about by the combined effect 

 of uncongenial soil, uncongenial climate and imperfect union. 



Trunk and Branch Injury. — In Bulletin 1G7, page 286, we de- 

 scribed an apricot trunk disease found in the Hudson A-^alley. 

 A similar disease has been observed at Lodi and Geneva. At 

 Lodi vigorous trees in full foliage suddenly wilted and died 

 early in June. At the surface of the soil the bark on the south- 

 west side of the trunk was dead and shrunken to the v>'ood. 



In the Station orchard two trees of Japanese apricot, variety 

 Bongoume, show several large areas on trunk and larger 

 branches on which the bark is dead and shrunken to the wood. 

 The dead areas bear numerous pycnidia of Cijtospora}^ 



At Lodi we saw large, vigorous apricot trees, some of the 

 larger branches of which were dying. The only apparent cause 

 was Ci/tospora which was growing profusely on th€ bases of the 

 dying branches, thickly covering them with its pycnidia. It is 

 our opinion, that in this case at least, the Cytospora was parasitic. 



Brot^oi Spot (HelmintJiosporium carpophilum L(Sv.) — We have 

 occasionally seen this disease at Geneva and Lodi during the past 

 two seasons. It attacks the fruit, producing cinnamon-brown, 

 slightly-elevated spots which have a reddish tinge when young. 

 The apricot disease described and figured by Bailey" was prob- 

 ably brown spot. For a further discussion of brown spot see 

 page 192. 



Other Diseases. — There has been some fruit rot caused, by 

 Monilia fructigena, but much les.^ than usual. We have seen no 

 black spot of the fruit, Cladosporium carpophilum, no powdery 

 mildew and no leaf spot of any kind. 



'^Voi' a discussion of the Cytospora on stone fruits, see page 32.3. 

 "Bailey, L. H. Apricot Growing in Western New York. Cornell Univ. 

 Exp. Sta. Bui. 71 : 277. 



