354 CONNECTICUT EXPERIMENT STATION REPORT, IQI2. 



PINE-SWEET FERN RUST, Peridermiwn pyriforme Pk. We 

 have already reported this fungus (which has its II and III 

 stages on sweet fern, known as Cronartium Comptoniae Arth.) 

 on Pinus sylvestris, P. rigida, P. austriaca, and P. maritima, from 

 the Station forestry plantation at Rainbow. In May, 1911, 

 Forester Spring found it there on P. ponderosa, and in May, 

 1912, Forester Filley and the writer found it on this host and 

 P. montana, both hosts new, at least to this state. This makes 

 six different species of pineon which we have now found this 

 Peridermium. 



STEM CANKER, ? Phoma sp. Plate XIX a. Several times we 

 have had young specimens of white pine brought to us by forest- 

 ers showing the base encircled by a dead sunken area, as shown 

 in the illustration. Occasionally we have found the Phoma fruit- 

 ing slightly on these dead areas, and at least in one case, we 

 obtained this fungus in cultures from the specimens. We are 

 not sure as yet whether this fungus is responsible for the trouble 

 or whether it merely follows winter and drought injury. Some 

 of the specimens have the aspect of being quite parasitic. 



We have seen no notice of a Phoma canker of white pine in 

 this country, but Tubeuf, in his Diseases of Plants, mentions 

 two species of Phoma in Europe that attack the branches of 

 various coniferous plants. One of these is Phoma pithya Sacc., 

 and Saccardo, in his Host Index, gives the white pine as one 

 of the hosts of this fungus. On the leaves of certain species 

 of pine, including Pinus montana, we have seen Phoma acicola 

 (Lev.) Sacc. It is a question with this species also whether it is 

 parasitic or is merely following other injury where the leaves 

 have been killed part way from the apex inward. 



QUINCE, Cydonia sps. 



FRUIT SPOT, Cylindrosporium Pomi Brooks. In our 1909-10 

 Report, page 723, we described the appearance of this fungus 

 on the apple, and also reported finding it rarely on the common 

 quince, Cydonia vulgaris. In October, 1912, the writer also 

 found it on fruit of the Japan quince, Cydonia japonica. While 

 the fruit of this was abundantly covered with small purplish 

 discolorations, none of these showed the fruiting stage of the 

 fungus. Cultures from the tissue, however, showed that they 



