IGG EXPERIMENT STATION. [Jan. 



Tbiiiueu's description^ which mentions only that it was found 

 in tlie locality of Klosternenburg, where the Austrian Experi- 

 ment Station was located. 



On the Fruit. — Small, round, blackish spots on the skin of 

 the fruit are the first indications of the disease. These spots 

 usually appear when the fruit is about two-thirds grown, most 

 frequently on the upper side of the fruit, and if the spots are 

 very numerous they will, as they grow, coalesce and form a 

 large, irregular, diseased area. When the fruit is thus attacked 

 it becomes one-sided, due to the fact that a corky layer of cells 

 is formed by the fruit under the diseased area as a protective 

 layer. This corky layer is incapable of further growth, and 

 hence we get, as a result, the ill-formed fruit. The corky layers 

 are often ruptured, leaving deep cracks, which furnish an ideal 

 place for the growth of the spores of Monilia, which are always 

 ready to take advantage of such injuries. Hence we often find 

 both troubles on the same specimen. This disease attacks the 

 fruit much in the same way as the scab of apple and pear. Its 

 attacks are generally most noticeable on the late varieties of 

 fruits, and it thrives most luxuriantly during damp weather. 



On the Leaves. — This fungus causes a shot hole appearance 

 of the leaves. The first indications one has of the disease upon 

 the leaves are scattering brown spots. These spots, as a rule, 

 spread over the leaf, and as the fungus matures the tissues dry 

 up and the diseased portion falls out, leaving a circular opening. 

 This fungus seems to prefer the part of the leaf between the 

 veins. The spores of the fungus attacking the leaf agree with 

 those growing on the fruit, with the possible exception that they 

 are somewhat smaller, but no doubt this slight variation is due 

 to the environment rather than being a specific character. 



On the Twigs. — Sturgis gives an account of this fungus at- 

 tacking the peach twigs. He states that the twigs are marked 

 more or less abundantly with circular spots, somewhat resem- 

 bliug in appearance the " birds' eye rot " of grapes (Spaceloma 

 ampelinum, DeBarv). Frequently the spots join together and 

 cover the twig so thoroughly as to destroy the pinkish-brown 

 color of the bark. Although not having seen this phase of the 



