DISEASES OF PLANTS. 355 



Stand for more than two months in the greenhonse. At the end of that period 

 small inconsplcnons reddish bodies, the perithecia of the Nectrla, were obserred 

 scattered over the surface of the soil in the pots. None of them grew on the 

 dead seedlings but directly on the soil. The experiments were repeated and the 

 perltliecia api)eared again in a little more than two months. Attempts to grow 

 the ascospores were unsuccessful, chiefly because of the great number of bacteria 

 which developed. 



At the present time the connection between the Nectria and Fusariiini is not 

 absolutely established, but the author believes it very probable. 



Femes annosus and two species of Gymnosporangium on Juniperus vir- 

 giniana, C. Hartley (Abs. in Science, n. ser., 31 (1910), No. 799, p. 639). — The 

 presence of /•'. annosii.s on the roots of Pinus strobiis and /*. rigida is reported, 

 and it is said also to cause the death of J. virginiana and probably to occur 

 on P. tceda in Delaware. 



The author also notes the occurrence of G. gcnninnlc and an undescribed 

 species of the same genus on red cedars in Virginia, Maryland, and Connecticut. 



Notes on some diseases of coniferous nursery stock, C. Hartley (Abs. in 

 Science, n. scr., 31 (1910), No. 799, p. 639). — Brief notes are given on the occur- 

 rence of Rltizoctonid sp.. Pythiinn dcbaryanum, and a parasitic leaf blight 

 occurring on seedlings in a coniferous nursery in Nebraska. 



Some new parasitic fungi of ornamental plants, II, G. Trinchieri (Rend. 

 Accad. Sci. Fis. c Mat. Napoii, 1909, No. S-12, p. 9; abs. in Riv. Patol. Veg., // 

 (1910), No. 7, p. 101). — The author calls attention to the occurrence of Pho- 

 mopsis aloeapercrassw and PestaJozzia aloea on scapes and flowers of the aloe, 

 and of Glccosponnm polymorph iim and CoJIetotrichum draccenw on the leaves 

 of Dracania fragrnns. 



Experiments on the infection of Lychnis (Melandrium) album by TJstilago 

 violacea, E. Werth (Milt. E. Biol. Aust. Land ». Forstir., 1909, No. 8, pp. 

 13-1')). — The author claims to have produced fl(»wer infection of this smut by 

 placing spores and pollen grains on the stigmas of healthy flowers. The spores 

 form sporidia, which on germination produce hyphte that penetrate the ovary 

 of the flower and subsequently other pistillate flowers. The presence of this 

 mj'celium in the plant causes the dormant stamens to develop and a hermaphro- 

 dite flower is produced, the stamens of which are full of smut spores in place 

 of pollen grains and the pistil of which is sterile. The original flower, the stigma 

 of which was directly inoculated with pollen and smut spores, showed in almost 

 every instance no evidence of sucli infection, but produced sound and healthy 

 seed. All subsequent flowers were sterile. 



According to the author, the spores of this smut have a twofold function- 

 one, like the uredospores of rusts, to disseminate the smut during the summer 

 by flower infection, and the other, like the teleutospores, to enable the smut 

 to winter over and produce new infections on the seedlings and young shoots 

 in the sin-ing. 



The principal diseases of the rose, L. Montemartini (Riv. Patol. Veg., 4 

 (1910), No. 8, pp. 126-128). — This is a popular descrii»tion of the following 

 pests of roses, together with recommendations for their control: Rust (Phrag- 

 midixnn subcorticinm). leaf spot (Marsonia rosw), mildew (Oidium), green lice 

 (aphids), rose sawfly (Hiilofonia ro.sa-), and gall flies (Rlioditcs rosa'). 



The preparation of Bordeaux mixture, H. M. Quanjeb (Tijdschi: Planten- 

 ziektcn, 16 (1010), No. 1-2, pp. 16-31, pi. /).— After a series of experiments on 

 different methods of making this spray, the author recommends 14 kg. copper 

 sulphate and $ kg. lime to 100 liters of water. The copper sulphate is dis- 

 solved in a wooden vat by susi)ending it in a sack in 50 liters of water, or it can 

 54.345°— No. 4—10 5 



