400 EXPERIMENT STATION RECORD. 



Some nematode diseases of plants, G. Delacroix {Agr. Prat. Pays Chauds, 

 1(1902), No. 6, pp. 672-680). — Descriptions are given of a nematode disease occurring 

 upon bananas in Egypt, previously reported (E. 8. R., 14, p. 264), and a nematode 

 disease of black pepper reported from Cochin China. The latter seems to be due to 

 the common nematode Heterodera radicicola. This species of nematode has previously 

 been reported in Java upon the betel pepper, a plant nearly related to the ordinary 

 black pepper. 



The epidemic occurrence of Coronartium ribicola in the Dahlen botanic 

 gardens, P. IIennincjs (Kotizhl. Bot. Garten u. Mux., Berlin, 8 {1903), No. 28, pp. 

 172-17 o). — During the summer and late fall of 1901 the different species of Ribes were 

 severely attacked by the fungus Coronartium ribicola. It was first noticed upon a 

 bush of R. nigrum, toward the end of June, and by the end of July and beginning of 

 Auo-ust nearly every species of the genus had been attacked, and by the end of August 

 hardly a sound leaf was to be found. Of about 30 species and varieties examined 

 R. alpinum was the only one free from the fungus. 



Diseases of forced strawberry plants, J. Cure [Rev. Hort. {Paris], 74 {1902), 

 No. 12, jij). 286, 287). — The frequent occurrence of what the author terms mildew, 

 or rust, is noted. It may be kept in check by spraying with Bordeaux mixture or 

 by the use of 500 gm. potassium sulphid in a hectoliter of water. Healthy plants 

 grown in rich soil and well watered do not seem to be as subject to injury as those 

 grown under less favorable conditions. 



Some diseases and parasites of vanilla, A. Zimmermanx ( Centhl. Bali. u. Par., 2. 

 Alt., 8 {1902), No. 15-16, pp. .f 69-481, pi. 1, figs, ^i).— Notes are given of a number of 

 fungus and insect parasites of the vanilla plant. Among the fungus diseases described 

 are those due to Nectria vamllns n. sp., N. cqfeicola, Physalosjmra ranlllx n. sp., 

 Cha'todiplodia vanilhe n. sp., Colletotrichum macrosjiorum, C. incarnatum, and Fusi- 

 cladium vanillie n. sp. In addition to the above, attacks of Aspidiotus aurantii and the 

 larvfe of an imdetermined insect are described. 



Two diseases of vanilla, G. Delacroix {Agr. Prat. Pays Chauds, 1 {1902), No. 

 6, ]ij). t!80-6SS). — Descriptions are given of Calospora vanillie, the attack of which 

 somewhat reseml)lesan anthracnose, and the rust of vanilla ( Uromycesjoffrini n. sp. ). 



Grape diseases and their treatment, F. GvozDEXOvic(Z^sf'/n'. Landto. Vcrsnclisiv. 

 Oestirr., 5 {1902), No. 3, pp. 497-500). — A brief account is given of the occurrence 

 of Peronospora, anthracnose, and oidium of grapes. For the prevention of Perono- 

 spora, experiments were conducted with Bordeaux mixture of varying strengths, Bor- 

 deaux mixture to which potassium permanganate was added, a solution of nickel 

 sulphate and lime, and zinc sulphate" and soda. All of these proved beneficial in pre- 

 venting attacks of the disease, the Bordeaux mixture and potassium permanganate 

 probablv giving the best results. 



Suggestions for combating grape mildew, J. M. Guillon {Jovr. Agr. Prat., 

 n. .S7'/-., 4 {1902), No. 32, pp. 177, 178). — The author discusses the possibility of com- 

 bating the downy mildew and powdery mildew of the grape by spraying with a sin- 

 gle fungicide. For this purpose he suggests the addition of sulphur to any of the 

 ordinary fungicides. The sulphur does not enter into chemical combination, but is 

 held in suspension, and when sprayed upon plants influences but little the adhesive 

 property of the fungicide and at the same time is efficient against tlie powdery 

 mildew. 



Brunissure and the California vine disease, E. II. Twight {Prog. Agr. et Vit. 

 {Ed. L'Est), 23 {1902), No. 20, pp. 59(9-59^).— The author calls attention to the claim 

 of Yiala and Sauvegeau that brunissure and the California disease of grapes were 

 caused hy species of Plasmodiophora (E. S. R., 4, p. 380; 5, p. 423). Recent inves- 

 tigations have thrown some doubt upon the existence of this parasite, and the author 

 believes that the experience in California tends to discredit the theory of the para- 

 sitic nature of the disease, which continues locally in the vicinity of Anaheim. A 



