970 EXPERIMENT STATION RECORD. 



claims to have infected pine needles with spores from Coleosporium 

 campanula micrantha, the spermagonia appearing in October. 



Inoculations of pine needles made in September with spores of G. 

 sonchi-arvensis from Sonchus asper, and (7. tussilaginis from Tmsilago 

 farfara resulted in the appearance of spermagonia in November. 



The leaf-spot disease of walnuts H. Boltshauser (Ztschr. 

 Pflanzenkrank.,8, {1898), No. 5, p. 263).— The author reports the appear- 

 ance in Thurgau during July of the past year of a disease of walnut 

 leaves. The spots were very numerous, round, and dry, the inner por- 

 tion brownish gray, and the outer part darker, more or less arranged 

 in zones. The spots were of various sizes, ranging from 1 mm. to 1 cm. 

 in diameter and occurred on both sides of the leaves. The dried leaf 

 substance finally falls from the leaves. The perithecia which are found 

 on the upper side of the leaf are globular, more or less sunken, about 

 0.08 mm. in diameter. The spores are oblong, 2-celled, and often con- 

 stricted in the middle. They are from 0.01 to 0.013 mm. in length and 

 from 0.004 to 0.005 mm. in diameter. The fungus, which appears to 

 have been undescribed, has been given the name Ascochytajuglandis. 



Notes on the Michigan disease known as "little peach," E. F. 

 Smith {Reprint from Fennville Herald, 1898, Oct. 15, pp. 12).— In an 

 address before the Saugatuck and Ganges Pomological Society the 

 author describes this little-known disease which threatens to become of 

 great importance to the peach growers of that State. The symptoms 

 of the disease are the dwarfing of the fruit, retarded ripening of fruit, 

 absence of any red spotting of skin or flesh, the dwarfing or yellowing 

 of the foliage from the start, and the absence of sprouting winter buds. 

 The affected peaches are badly dwarfed, usually one-half or less the 

 size of ripe healthy peaches of the same variety. The color of the 

 skin and flesh is normal. The pits are small but hard and well devel- 

 oped. The leaves are much smaller than normal, perhaps on an aver- 

 age only about half as large. They are thicker, of a sickly, yellowish, 

 reddish, or brownish green color. The diseased leaves examined were 

 found free from mildew, fungus, or insect depreciations. Unlike the 

 rosette and yellows of the peach this disease often appears on all parts 

 of the tree, although sometimes it appears first on one or more limbs, 

 spreading to the remainder of the tree. The main root and all other 

 larger branches appear sound in bark and wood, but the ultimate root- 

 lets were found badly diseased in every specimen examined, fully nine- 

 tenths of the rootlets being found dead and shriveled or brown and 

 dying. Trees attacked by this disease are said to die the second or 

 third year. This disease has been attributed to various causes, several 

 of which are discussed. The author states that in his opinion the dis- 

 ease is due to shutting off of the water supply to the tree, but whether 

 this is brought about by some parasite or by drought combined with 

 overbearing and unsatisfactory condition of soil can not as yet be 

 determined. 



