446 EXPERIMENT STATION RECORD. 



repression. Studies are also reported upon various weeds, a number of which 

 were successfully destroyed by spraying the fields with 1.5 to 25 per cent solu- 

 tions of iron sulphate. This treatment was especially efficient in destroying 

 wild mustard and wild radish. 



Sprout infection by smuts, L. Hecke {Ztschr. Landw. Versuchsw. Osterr., 

 10 (1907), No. 6, pp. 512-51. 't). — As a result of his experiments the author 

 claims that in addition to smut infection through the flowers and seedlings, a 

 third metliod must be recognized, in which the infection takes place through 

 the young shoots, and probably in the case of cereals through the stooling shoots 

 of the plant. He thinks this method of infection quite common for IJsfihu/o 

 violacea and Urocystis occulta and possibly other species of smuts. 



New species of fungi, 0. L. Shear (Bui. Torretj Bot. Cluh, 3Jf (1901), No. G. 

 pp. 305-311). — Technical descriptions are given of the following new species 

 and varieties of fungi discovered by the autlior on the leaves and fruits of the 

 cranberry: Cladospoiium oxycocci n. sp., Helminthosporium inwquale n. sp., 

 FlmUoHtictu putrefacicns n. sp., Sphxeronema pomorum n. sp., Septoria Jongi- 

 spora n. sp., Sporonema o-rycocci n. sp., /S. pnJvinatum n. sp., Plagiorhahdns 

 oxycocci n. sp., Leptothyfium oxycocci n. sp., RJiuhdospora oxycocci n. sp.. 

 Ceuthospora (?) liinata n, sp., Anthostomella destruens n. sp., Acanthorhynchus 

 vaccina n. sp., Gloinerella rufomactilans vaccinii n. var., Gloeosporiuni minus 

 n. sp., and Gulgnardia vaccinii n. sp. The last species is said to be the cause 

 of the serious cranberry scald, first described, but without name, in Bulletin 04 

 of the New Jersey Stations (E. S. R., 1, p. 263). 



In addition other species of fungi are described, among them Ozonium omni- 

 rorum n. sp. from cotton roots. This fungus is said to occur from eastern 

 Texas to southern California and is a facultative parasite infesting the soil and 

 attacking the roots of a great variety of plants, causing serious damage to such 

 cultivated crops as cotton, alfalfa, cowpeas, sweet potatoes, beets, and fruit 

 trees. The cotton root rot hitherto attributed to O. auricomum is said to be due 

 to 0. omnivoriim, and while the other species occurs in Texas, so far it has 

 been observed only as a pure saprophyte. 



New and additional species of fung'i, G. Massee (Roy. Bot. Gard. Keiv, Bui. 

 Misc. Inform., 1901, No. 6, pp. 2-38-2////, pi. 1). — A list of the species of fungi ob- 

 served by the author in the Kew Gardens is given. Among the species men- 

 tioned are the following parasitic forms: Pyrcnochwta pJiloxidis n. sp. occurring 

 on phlox, Ascochyta cookei n. sp. on sweet william, and Ramularia necator n. sp. 

 on the cotyledons of seedling cacao. 



P. phloxidis was quite destructive to a bed of phlox, the foliage first assum- 

 ing a greenish-yellow color', and afterwards wilting and falling to the ground, 

 followed by a breaking of the stems near the base. The species of Ascochyta 

 resembles A. dianthl, but differs in some very important characters. The spe- 

 cies of fungus on the cacao was observed on the cotyledons of plants grown 

 from seeds recently obtained in Jamaica. It proved to be truly parasitic and 

 quite destructive, and tlie author raises the question whether this fungus has 

 been observed as a parasite on cacao seedlings in Jamaica. 



Celery root rot, J. M. Van Hook (Ohio 8ta. Circ. 72, pp. 6, figs. 3).— In 1904 

 a serious root rot of celery was reported from a number of districts in Ohio, 

 the affected plants being characterized by a decay of the main roots, leaving 

 only the crown, usually in the form of an inverted cone, so that the plants are 

 readily lifted from the ground. The remaining portions of the root are lilack 

 or brown in color, and the disease is found to extend to the bases of the outer 

 leaf stalks, which after infection die. The decay of the roots is usually com- 

 jilete. In sonie cases, partienlnrly among yoimg jilants, new roots appear, but 

 the plants never attain full size or wholly recover from the injury. 



