432 EXPERIMENT STATION RECORD. 



noticed no dift'erence in tlie relativ^e prevalence of blight on cnltivated 

 ground, 38 per cent sliowed le.ss blight in orchards in sod, and 17 per 

 cent were in favor of liigh cultivation. The disease so far seeuis to be 

 con lined to the provinces of On.tario and Quebec. A sketch is given 

 of the disease in Ontario and at the exi)eriniental farm, and ])ractical 

 suggestions offered as to means for its prevention. 



Some results of recent investigations on the grain rusts, 

 J. Eriksson and E. IIenning {Kgl. Laiidt. Akad. Hancll. Tidslr., 33 

 (76'.Vi), pp. l(il-177). — A monograph of the grain rusts, giving their 

 physiology, experiments in preventive treatment, etc. The varieties 

 studied are Pucciiiia yraminis, J\ p]il€i-pr(ifcH.sis, n. sp., P. (jUimayum, 

 P. (lispersa, n. sp., P. simplex, and /'. eoronatu. — F. w. woll. 



Sugar-cane disease, W. Faavcett {BnJ. Bot. Dept. Jamaica, 1 {1S94), 

 No. 7, i^. 111). — Attention is called to a disease of sugar cane in Jar vir-a. 

 The fungus causing the disease attacks the roots and was determuied 

 by G. Massee as Colletotrichum, faJcaium. The disease may be recog- 

 nized by the affected rootlets becoming soft and decayed. The whole 

 cane should be taken up and burned and some other crop cultivated in 

 the infested soil for a few years. In selecting cane for iilanting strong 

 and healthy tops should be used, and it is advisable to get them from 

 districts where the disease does not exist. 



Aureobasidium vitis, a disease of the grapevine, P. Eloste 

 {Compt. Rend., 11!) {1891), No. 12, pp. 517, ulS; also Jour. Af/r. Prat., 

 58 {1894), JVo. 39, pp. 401, 4(i2). — The author reports the occurrence of 

 this disease in the Department of Heraull. It first a})})oared in 181)3 

 and in this season it had spread quite generally thrwUghout the depart- 

 ment. The nature of the attack on the host is fully described and the 

 fungns determined as Axreohasidiiim vitis, which has already been 

 described (E. S. li., G, p. 230). B( rdeaux mixture and a wash of a solu- 

 tion of iron sulphate have been used without an>' considerable effect 

 as preventive remedies. 



On the gummosis of grapevines, L. Mangin {Compt. Pend., 119 

 {1894), No. 12, pp. 514-516; also Jour. Agr. Prat., 5s {1894), No. 39, pp. 

 459-461). — Tl'e author thinks the gum and mucilage found in the vessels 

 of the grapevine are secreted by certain specific cells in a definite way, 

 and are not caused by the presence of bacteria or other organisms. 

 He claims the appearance of such organisms is subsequent to and not 

 the cause of the formation of gum in the grape. Attention is called 

 to the fact that gum secretion is not confined to the grape, but is found 

 in many of the Rosacea', Acacia spp., etc. The conditions for the pro- 

 duction aiid appearance of the gum are still to be the subject of further 

 study. 



The effect of spraying with fungicides on the growth of nursery 

 stock, B. T. Galloway ( U. H..l)ept. Agr., Division of 'cgetahle Pathol- 

 offji BnL 7, pp. 11, figs. 17). — Nursery sto(;k, i)articular]y pears, cherries, 

 plums, and apples, is especially sulject to various fungns diseases pro- 

 ducing (1) in the case of seedlings iii)ened wood so that the buds can 



