152 EXPEEIMENT STATION RECORD. 



The morphological and physiological characters of the organism are described 

 at length and comparisons are drawn between the cause of this disease, which is 

 given the name Bacillus nicoihnur n. sp., and a number of other bacteria which 

 cause diseases of plants, especially B. solanaccarum. The bacillus is found to 

 attack many cultivated varieties of tobacco, although some have thus far escaped, 

 as does Nicotiana nistica. Inoculation experiments have shown that positive 

 results were obtained with pure cultures on Pliysalis niiuiimoii. Capsicum 

 louffiiiii. Pohjgonum tinctoriiwi, and Amarantus f/an<jeticiis, but failed with egg- 

 plants, tomatoes, and PhysaUs alkelccngi. 



Early planting and resistant varieties are the preventive means suggested. 

 The author recommends in practice the burning of all trash and affected plants 

 and care in the use of fertilizers, nitrogenous fertilizers tending to predispose 

 the plants to the disease while jiotash fertilizers do not. 



Tomatoes and their diseases, W. W. Froggatt (Agr. Gas. N. S. Wales, 11 

 {1906), No. 3. pp. 209-218, figs, ^j).— After a brief account of the culture of 

 tomatoes, the author mentions some of their insect and fungus enemies. The 

 insects mentioned are the bollworm {Hcliofhis armigcr) and the Rutherglen 

 bug (Nysiiis riiiitor). Among the diseases described are the rosette of tomatoes, 

 a curious malformation of young fruits to which the name " sheath calyx " is 

 given ; sleepy disease, due to Fiisaniim lycopersici; black rot, caused by 

 Macros porimn tomato; pimply rot; leaf rust, due to Cladosporium fulvum, and 

 leaf blight, caused by Septoria lycopersicce. Where known, methods of treat- 

 ment for the prevention of these diseases are given. 



The parasitism of Neocosmospora, II. S. Reed {Science, n. srr., 23 (190 fi). 

 No. 593. pp. 731. 752).- — The author reports having found in ginseng gardens in 

 Missouri in 1904 a wilt disease which is attributed to Ncocosinospora vasinfecta 

 var. nivea. The fungus has been studied and described in a bulletin of the 

 Missouri Experiment Station (E. S. R., 17, p. 1164), and in the present article 

 the author calls attention to some features in the parasitism of the fungus. 



The fungus is generally believed to be an active parasite, but the results of 

 the author's studies seem to confirm the claim of Atkinson (E. S. R., 4, p. 8.31) 

 that it is a weak parasite and only attacks plants which are first weakened by 

 the presence of some other fungus. This conclusion is based on the facts that 

 the wilt disease did not appear except on ginseng plants previously attacked by 

 anthracnose, that spraying the plants for the prevention of anthracnose was 

 followed by freedom from wilt, and that watermelons grown in sterilized 

 soils that received test-tube cultures of the organism failed to show the slightest 

 indication of the wilt disease. The author believes that in previous investiga- 

 tions where active parasitism of Neocosmospora was claimed the soil was not 

 sterilized, and that, so far as his experiments go, the form isolated from the 

 ginseng plant is not an active parasite. 



Some fungus diseases and their treatment, B. F. Floyd {Missouri 8ta. Circ. 

 Inform. 21, pp. 12). — Brief descriptions are given of a number of fungus dis- 

 eases of various fruits, berries, vegetables, and ornamental ])lants, and, so far 

 as known, suggestions are given for their treatment. 



Pear blight work and its control in California, INI. B. Waite and R. E. Smith 

 (Cal. Fruit Clrowcr, 33 (1906), No. 923. pp. 1. 3-6, 9, 12-15, figs. 2).— A review 

 is given of the work carried on in the State. 



Investigations on grape anthracnose, P. Viala and P. Pacottet (Rev. Vit., 

 24 (190.5), Nos. 618, pp. J,33--',39, figs. 7; 620, pp. Ji89-i,96, figs. 15; 621, pp. 

 511-523, figs. 3; 623, pp. 513-580, figs. 13; 62J,, pp. 601-608, figs. 5; 626, pp. 

 651-663, pis. 6, figs 8; 25 (1906), Nos. 632, pp. 89-91, figs. 4,- 6Itl, pp. 3^1-3^1, 

 figs. U; 6Jf2, pp. 369-315, figs. i7).— The results of studies on the fungus Man- 



