204 SUMMARY OF CURRENT RESEARCHES RELATING TO 



most important ; Tremella faginea, Bispora monilioides and Schizo- 

 phyllum commune also aid in breaking up the wood. Other fungi are 

 responsible for special attacks on the trees or on the timber, and these 

 are described as also the best methods of prevention or cure. 



Diseases of Tobacco.* — A. H. Sleby gives an account of the various 

 fungal diseases that attack the tobacco plant. A root rot is caused by 

 Thielavia basicola ; where it has been noted, the beds should be changed. 

 Rhizoctonia also occurs on the roots, and a similar treatment is recom- 

 mended. Several other leaf diseases are mentioned as occurring or 

 likely to occur. 



Diseases of the Vine.f — A disease of vine leaves due to Phyllostkta 

 bizzozeriana was noted by Gy de Istvanffi in 1900. It caused brown 

 spots to appear on the leaves, on which appeared later the perithecia of 

 the fungus. As a disease the fungus is not of great importance, and 

 seems to be dying down. He gives a list of 10 species of Phyllostkta 

 on vines. 



An exhaustive account of the grey-rot of the vine is given by the 

 same author in a further paper 4 He describes the fungus Botrytis 

 cinerea in its effects on the vine and the development in various arti- 

 ficial media. He also recapitulates all that is known of the Sclerotinim 

 of Botrytis, and describes the means that have been taken to stamp out 

 the disease. 



Plant Diseases.§ — F. Noack gives an account of the lectures dealing 

 with plant diseases, delivered at the International Agricultural Congress 

 at Rome. Montemartini discussed the predisposition of plants to disease 

 and certain advantages some had, such as thickness of epidermis in 

 resisting attack. Voglino gave an account of several fungi that attack 

 rice : species of Goniothyrium, Sphcerella and Piricularia. Istvanffi 

 described the damage done to vines by Ithyphallus impudicus by destroy- 

 ing the roots. Jaczewski discussed the gooseberry mildew and a disease 

 of cotton caused by Neocosmospora basinfecta, and Speschnew gave an 

 account of a mulberry disease due to Fusarium Schavrovii, which attacks 

 the twigs and entirely destroys them. A leaf disease was found to be 

 due to Septoglozum mori. 



Rippert || communicates the results of researches in several fields of 

 plant disease. Two attacks due to bacilli, on potato tubers, and on the 

 stalks of cucumbers are described, and advice given as to dealing with 

 them. Black, yellow, brown, and other rusts are enumerated, with their 

 respective hosts. Streak-disease of barley is due to Helminthosporium 

 gramineum, which develops on decaying leaves in the soil and infects 



* Bull. Ohio Agric. Exper. Station, clvi. (1905) pp. 87-107. See also Bot. 

 Centralbl.,xcix. (1905) p. 548. 



t Ann. Inst. Centr. Ampelog. Roy. Hongrois, iii., livr. 3 (1905) pp. 167-82 (1 pi.). 

 See also Hedwigia, xlv. (1906) Beibl., pp. 52-3. 



t Op. cit., livr. 4, pp. 183-360 (7 pis.). See also Hedwigia. xlv. (1906) Beibl. p. 53. 



§ Zeitschr. Pflanzenkr., xv. (1905) pp. 344-5, 356-9. 



|| Fiiblings Landw. Zeit., Nos. 14-15 (1905). See also Centralbl. Bakt., xv. 

 (1905) pp. 479-80. 



