ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 77 



branches were killed by Trpex obliquus. He describes the fungus and 

 its effect on the woody tissues. 



Another fungus, Lasiobotrys Lonicerce, he found was subcuticular in 

 growth ; the fungus could hardly therefore belong to the Perisporiaceae, 

 which are all superficial forms. 



E,. Aderhold * contributes a paper on the question of the utility of 

 burying harmful fungi. It might be beneficial if care were taken not 

 to turn over the ground again in spring. This remedy is still more 

 doubtful in the case of sclerotia, that retain their vitality for several 

 years. 



In discussing the spread of rust on maize and cereals, J. C. Arthur f 

 points out the prevalence of Puccinia Sorghi in the uredospore stage, 

 while the fficidium, recently discovered on Oxalis, is very rare. He thinks 

 that the uredospores must cause most of the spread of the disease. 



G-. Delacroix | recounts the work done at the station for vegetable 

 pathology in France. In the first part he describes the parasitic fungi 

 that have recently been recorded as attacking cultivated plants, such as 

 melons, almonds, etc., and in the second part some new species that 

 have been found on the cultivated plants of warm climates. Most of 

 the species described are new to science. 



W. H. Lawrence § describes blackspot canker and blackspot apple 

 rot, a disease that grows in the bark and sapwood of the tree, where it 

 forms a stroma and pustules of Macrophoma curvisporum. When the 

 fruit is attacked spots are formed on which the pustules of the fungus 

 make their appearance. 



Fr. Kruger || finds that " ring-scab " of sugar beet is due to an 

 Oospora which enters by wounds caused by an insect. In slight attacks 

 the superficial tissues alone are affected, but in more serious cases the 

 deeper tissues are reached and the vessels are laid bare. Unfavourable 

 conditions of the soil are the chief causes of the disease. 



Plant Diseases in Britain.lf — A case of potato leaf-curl has recently 

 occurred at Kew. It is due to a black mould, Macrosporium Solani, 

 which forms velvety black patches on the leaves and haulms. In some 

 instances the mycelium passes down the haulm into t'ie tuber, which 

 may again reproduce the disease. Young sprouts are readily infected 

 by the fungus. 



Attention is also called ** to the white rust of cabbages. The fungus 

 Oystopus candidus attacks many species of Cruciferae, both cultivated 

 and wild. Shepherd's purse is the commonest host, and should be 

 eradicated. 



Advice is given \\ as to the best treatment of vines afflicted with 



* Arb. Biol. Abt. Land. Porstw. k. Ges. Amt., v. (1905) p. 35. See also Ann. 

 Mycol., iii. (1905) p. 382. 



t Proc. Soc. Prom. Agric. Sci., xxvi. (1905) pp. 94-8. See also Bofc. Centralbl., 

 xcix. (1905) p. 486. 



\ Bull. Soc. Mycol. France, xxi. (1905) pp. 168-204 (witb figures). 



§ Journ. Mycol., xi. (1905) pp. 164-5. 



(| Arb. Biol. Abt. Land. Forstw. k. Ges., iv. part. 3 (1904) 1 pi., 9 figs. See also 

 Bot. Centralbl., xcix. (1905) p. 506. 



^ Journ. Board of Agric, xii. (1905) pp. 476-8 (1 fig.). 

 ** Tom. cit., pp. 480-1 (2 figs.) ' ft Tom. oit. pp. 494-6 (2 figs.). 



