Pflanzenkrankheiten. 571 



are: Macrosporiitm Solaui, Hypochnus Solani, "Scab". Fusarium 

 solani and others of minor importance. A. D. Cotton. 



Mac Kinnon, E., Two new Grass Smuts. (Journ. Proc. Roy. 

 Soc. N. S. Wales. XLVI. p. 201—204. 4 pl. 1913.) 



The two fungi described are SoropJiorium Panici on Panicutn 

 flaviduin, and Ustilago panici gracilis on P. gracile. Morphological 

 and cultural notes are oriven. A. D. Cotton. 



Massee, G., A disease of Narcissus bulbs. (Kew Bull. Mise. 



Inform. N^. S. p. 307—309. 1 pl. 1913.) 



The fungus Fusarium bulbigerum Cooke & Mass. is described 

 as causing a disease in various kinds of Narcissus, and occasioning 

 great loss amongst the bulbs. The disease first attacks the leaves 

 and passes down, probabh^ by a series of secondar}^ infections, to 

 the bulb, the decay of which is hastened by the attacks of other 

 fungi and eelworms. Fusarium spores are produced abundantly on 

 the aerial parls, whilst numerous chlam3''dospores occur in the tissues 

 of the bulb and leaf. A. D. Cotton. 



Massee, G. and 1., Mildews, Rusts and Smuts. (229 pp. 5 pl. 

 London, Dulau & Co. 1913. Price 7/6.) 



A handbook of the British species of Peronosporaceae, Erysi- 

 phaceae, Uredinaceae and Ustilaginaceae. Concise descriptions for 

 genera and species are given and keys provided, in the case of the 

 Peronosporaceae and Erysiphaceae for species as well as genera. 

 The structure and development is summarised and also the biology 

 and parasitism of the Uredineae. Throughout the work the authors 

 include in brackets those species not 5^et met with in Britain, but 

 which are parasitic on indigenous host-plants and may be expected 

 to occur. A. D. Cotton. 



Stoward, F., The Effect of Certain Chemical Sub- 

 stances on the Buds of Potato Tubers and their 

 de s i n f e c t i v.e action on Potato Blight. (Proc. roy. 

 Soc. Victoria. XXIV. 2. p. 270—292. 4 pl. 1912.) '^ 



The objects of enquiry were to ascertain the influence of cer- 

 tain antiseptic Compounds in aqueous Solution on the blight-free and 

 blight-infected tubers particularly with regard to the hibernating 

 m\'celium of Phytophthora infestans and the injury of the "e\^es". 

 The experiments show that during the earlier stages of immersion 

 aqueous Solutions of NaCl, H2SO4 and H3BO3 gain entrance chiefly, 

 if not entirely, through the buds. When the skin has been damaged 

 by a fungus the Solution also passes through the injured portions. 



With sulphuric acid if the steeping is restricted within certain 

 limits of time the vitality of the buds is unimpaired, but a steep of 

 10 hours duration in a 10 per cent Solution destro^'ed both the buds 

 and the mycelium in the case of infected tubers, without however 

 seriously damaging the cooking, edible or storage qualities. 



A. D. Cotton. 



