1917] DISEASES OF PLANTS. 651 



sprays, as such, has been demonstrated by these reports, as practically the 

 same results were obtained by the use of neutral or basic preparations. 



Diseases of grapevines in Vardar, P. Viala (Coinpt. Rend. Acad. Agr. 

 France, 2 (1916), No. 20, pp. 561-564; Rev. Vit., U {1916), No. II46, pp. 425- 

 427). — Giving an account of some parasites injurious to grape stocks in parts 

 of southern Europe and northern Africa, the author describes an attack by 

 a termite (Calotermes lucifugus), which, particularly in the hill region of 

 Vardar, enters (by way of the quickly dried and hence poorly cicatrized 

 wounds left by pruning) into the pith and adjacent tissue of grape stock, 

 and is often accompanied by a polyporous fungus (noted also in France), 

 which. If unchecked, destroys the vine in five or six years. An arsenical 

 treatment has been successfully used for both the animal and the fungus 

 parasite. The fungus is said to be very sensitive to the action of oxygen, and 

 is also said to have been controlled for years in some regions by splitting 

 the stock and inserting a stone to keep the wound open to the air, this treat- 

 ment causing the death of the parasitic fungus. 



Grape diseases in Greece, P. Viala {Compt. Rend. Acad. Agr. Fi-ance, 2 

 (1916), No. 26, pp. 723-725).— The author quotes a communication from Gen- 

 nadius addressed to the Academy of Agriculture, in which it is claimed that 

 the procedure above described, though indeed very old, as are others described, 

 is designed only to check too luxuriant vegetation and restore the full fruiting 

 capacity of the vines, various selections from earlier writings being quoted 

 in this connection. 



Observations on the distribution of citrus canker, D. B. Mackie (Philip- 

 jnne Agr. Rev. [English Ed.], 9 (1916), No. 4, pp. 278-281, pi. i).— The author 

 and some of his associates have made a survey of the Philippines to determine 

 the distribution of the citrus canker, and have found the disease present in a 

 number of localities, occurring on different species of Citrus. The presence 

 of the disease in these localities can in many instances be traced to shipments 

 of plants from Manila. The conclusion is reached that, as the disease has not 

 been found in the more remote districts, its introduction into the islands is 

 comparatively recent. 



Spore variation in Neopeckia coulteri, J. S. Boyce (PhytopatJiology, 6 

 (1916), No. 4, pp. S57S59). — While examining collections of N. coulteri, the 

 author reports having observed several of the spores to have become two- 

 septate and sometimes three-septate by the formation of secondary septa. 

 This led to a study of other collections, from which it appears that such 

 behavior of the spores is not uncommon. The triseptate spores of Neopeckia 

 and spores from a species of Herpotrichla on Primula suggest a very close 

 relationship of the two fungi. 



Preliminary note on the occurrence of Peridermium balsameum in Wash- 

 ington, H. ScHMiTZ (Phytopathology, 6 (1916), No. 4, pp. 369-371, figs. 2). — 

 The author reports the occurrence of this rust on the seedlings of Abies 

 amabilis. It is said that this is the first record of the species west of the 

 Mississippi Valley. 



A successful inoculation of Abies lasiocarpa with Pucciniastrum pustu- 

 latum, J. R. Weib and E. E. Hubert (Phytopathology, 6 (1916), No. 4, p. 373).— 

 The authors have successfully inoculated young needles of A. lasiocarpa with 

 P. pustulatum, collected on overwintered leaves of Epilohium angustifolium. 



Successful inoculations of Lariz occidentalis and L. europea with Melamp- 

 sora bigelowii, J. R. Weib and E. E. Hubebt (Phytopathology, 6 (1916), No. 

 4, pp. S72, 373). — Successful inoculations of the above species of Larix with 

 teliospores of M. higelotoii from a willow are reported. 



