154 EXPERIMENT STATION RECORD. 



On the parasitism of Fusarium roseum and allied species, L. Mangin ( Compt. 

 Reud. Arad. .S<'i. PnrU, 131 (1900), No. J6, pp. lJ44-lS40).-^he author states that 

 in cultivating L-arnations in a number of media he has been a])le to demonstrate the 

 parasitism of a numy)er of species of Fusarium, among them F. roseolum, F. commuta- 

 tum, F. roseum, F. aurantincwn, F. o.njsporium, and F. pi/rochroum. The character- 

 istic's of each of these fungi upon the host are described, from which the author 

 conchides that the parasite causing the disease upon carnations is not new and should 

 not be given the name F. dUmtlii of Prillieux and Delacroix. Experiments con- 

 ducted for the prevention of this disease have shown that lysol, corrosive sublimate, 

 and naphthol applied to the soils are efficient in preventing the growth of the fungus. 



A disease of the locust tree, H. von Schrexk (Abs. In Science, n. ser., 13 {1901), 

 Xo. 3 JO, p. ,.'47).—\ destructive disease of the black locust {Robiniapseudacacia), due' 

 to Fahiporus rimosuK, is described. The fungus destroys the heart wood of the tree, 

 leaA^ing a soft yellow mass. The fruiting organs form on the trunk and larger branches, 

 discharging their spores in summer and fall. The mycelium grows only in the heart 

 wood of living trees and dies as soon as the tree is cut down. This is thought to be 

 probably due to changed conditions of aeration, moisture, and temperature, and as a 

 result the fungus is considered as belonging to a special class of saprophytes. 



The bacterial diseases of plants, E. F. Smith {Abs. in Science, n. ser., 13 {1901), 

 Xo. 3^0, p. 249). — An account is given of diseases caused by bacteria, and the wilt of 

 c-ucurbits due to Bacillm tracheipkilus, the brown rot of solanaceous plants due to B. 

 solanacearum, and the black rot of cruciferous plants caused In- Fseudomonas campes- 

 tris, are described. 



The nematodes of coffee roots, A. Zimmermann {Meded. 'S Lands Plantentuin, 

 37 {1900), pp. 1-23, Jiijs. 2). — The author gives an account of the habits and life his- 

 tory of Heterodera radicicola, Aphelenchns coffese, and Tyknchus acutocaudatm. The 

 first-named species is not especially injurious to the roots of coffee in Java. The 

 other species, however, commit serious depredations, and the number of coffee plan- 

 tations which have been destroyed in Java by the attacks of these worms is esti- 

 mated at over 4,000. Brief notes are given on the nature of the injuries caused by 

 the parasitic nematodes. 



Among the remedies which were tried for the purpose of destroying these worms, 

 ferric sulphate gave promising results, while copper sulphate was used without suc- 

 cess. Petroleum, benzin, and creolin were also used without satisfactory results. 

 The application of carbon bisulphid was attended with good success. Experiments 

 were also conducted in manuring the ground around infested plants, digging out and 

 burning infested plants, quarantining infested areas, and thorough cultivation of the 

 ground. Good results were obtained in some cases by planting other crops upon 

 infested ground for a few years. 



A considerable number of experiments were tried in grafting Java coffee upon the 

 roots of other plants of the same family in order to determine whether such coffee 

 might be grown upon roots which would resist the attacks of nematodes. In these 

 experiments roots of the following plants were used: Cinchona succirubra, Coffea den- 

 sijtora, Moriada citrifaiia, Psychotria robusta, and Gardenia, (jrandiflora. Thus far 

 these experiments have been without promising results. The author recommends 

 in cases of infestation by Aphelenchus coffese or Tylenchus acutocaudattis that areas in 

 which the Java coffee is dying out should be thoroughly investigated, and if the 

 nematodes are found, that such areas should not be planted to coffee. It is also sug- 

 gested that further experiments in grafting coffee upon the roots of other plants 

 might be tried on a small scale. 



Literature of plant diseases, "W. C. Sturgis {Connrctieut State Sta. Rpt. 1900, pi. 



■ 3, pp. 25.5-297). — This is in continuation of a bibliography published in a previous 



report (E. S. R., 10, p. 267) in which the literature relating to plant diseases is 



brought down to include the years 1887-1900. The list given is not intended as a 



