570 EXPERIMENT STATION RECORD. 



The carnation in health and disease, A. F. Wood {Florist.^' Exchange, 13 {1901), 

 No. 8, pp. ISS, 1S9, fi(js. 4; Atncr. Florid, 16 (1901), No. 664, m^. 990-993, Jifj>^. 10) .—The 

 author popularly describes the stignionose of carnations, and briefly mentions stem 

 rot, leaf spot, and fairy ring spot as sometimes proving serious diseases of carnations. 



An injurious fungus of orchids, P. Hennings {Notizhl. K. Bat. Garten u. Mus., 

 Berlin, 3 [1901), No. 25, pp. 97-99). — A brief account is given of a hitherto unde- 

 scribed fungus which has been observed upon the pseudobulbs of Maxillariarufescens. 

 The fungus, to which the name Neclria bidhlcola, n. sp., is given, is technically 

 described. The fungus seems to be indigenous in Venezuela or Trinidad, but has 

 been observed to cause serious injury in other localities. 



A new method of combating nematodes, 11. Wilfarth {Ztschr. Ver. Deut. 

 Zuckerind., 1900, No. 529, pp. 195-204; nbs. in Centbl. Bakt. u. Par., 2 AhL, 7 {1901), 

 No. 12, p. 445). — On account of the excessive cost and impracticability of catch 

 crops and chemicals for the destruction of nematodes, the author was led to inves- 

 tigate other means for their destruction. He reports having observed in beet fields 

 that here and there individual specimens occurred which had not been attacked by 

 the nematodes, and suggests the possibility of l^reeding a race of sugar beets which 

 will be resistant to nematodes. 



On the preventive spraying of green plants, L. M.vngin {Rev. Hort., 73 {1901), 

 No. 4, p. 86). — The occurrence of fungus diseases and insect enemies on palms and 

 other plants in hothouses, especially where the atmosphere is humid, is commented 

 upon. Palms in particular are subject to attack of Graphiola phte)iiri.s, which attacks 

 the leaves, and if conditions are favorable for its rapid propagation the plants, unless 

 unusually vigorous, are weakened by it. Another serious trouble in the greenhouse 

 is the fumagine which follows the presence of certain insects. For the prevention of 

 the fungus diseases, the author recommends spraying the plants with a one-half per 

 cent solution of copper sulphate, or a solution of naphtholbeta, 5 gm. to 10 liters of 

 water. For the destruction of insects, tobacco extract may be added to the naphthol 

 solution. 



A calcium sulphid or a sulphur-copper fungicide, A. Seignouret {Rev. Vit., 

 14 {1900), p. 437; aU. in Ann. Agron., 27 {1901), No. ^;,^j..290).— Theauthor descriljes 

 a fungicide which has been successfully used for the prevention of grape diseases. 

 It is composed of 25 kilos of lime and 50 kilos of triturated sulphur, which are 

 mixed with 100 to 200 liters of water and boiled for 2 to 3 hours. To this mixture 

 50 kilos of copper sulphate in solution are added and the volume diluted to 25 or 

 50 hectoliters, depending on whether a 1 or 2 per cent solution is desired. This 

 mixture gives a complex precipitate of sulphate of lime, sulphate of copper, and 

 sulphur. In practice it has been found that 2 applications of the fungicide — the first 

 made in May and the second about the end of June— will protect the grapevines from 

 mildew. The fungicide adheres very readily to the leaves, and the copper sulphate 

 decomposing slowly retains its efficiency for a considerable time. 



ENTOMOLOGY. 



Notes on troublesome insects, E. ^1. Wilcox {Oklahoma Sta. Rpl. 1901, pp. 112- 

 116, figs. 3). — Ajyhis cucumeris is reported as doing considerable damage to melons dur- 

 ing the season of 1900. For controlling the ravages of this insect it is recommended 

 that the ground be thoroughly cleared of all rubbish at harvesting. Badly infested 

 plants may be sprayed with kerosene emulsion. The harlequin cabbage-bug is reported 

 as producing 5 broods in Oklahoma. The last brood is said to winter over as nearly 

 mature adults. It is urged that leaves and other refuse should be collected into 

 heaps to serve as hiding places for the bugs, and that this rubbish should l)e Inirned 

 late in the winter. For controlling Mijzus cerani it is recommended that infested 



