796 SUMMAEY OF CURRENT RESEARCHES RELATING TO 



Diseases of Plants. — 0, W. Edgerton * notes two new diseases of 

 Ficus Garica. One which induces canker of the branches is due to 

 Tubercularia Fin sp.n. The other is caused by Corticium Isetum ; it 

 attacks the ends of the branches, and spreads backwards. 



Edw. C, .Tohnsonj examined the wheat crop of the south-west States 

 of North America to find the reason of the reduced yield. He found 

 that two fungi had attacked the cereal, Stemphylium Tritici and Puccinia 

 gram in is. 



W '. McEae + has published a report on the blister blight of tea caused 

 bv the fungus Exobasidium vexans. The leaves attacked are often 

 covered with the white blisters, and are rendered valueless ; often the 

 whole bush suffers. Only young leaves are attacked; these should be 

 plucked and destroyed. 



Flora Patterson, W. Charles, K. Vera, and F. J. Veihmeyer,§ pub- 

 lish an account of some fungous diseases of economic importance. 

 Kawakamia Gyperi Miyake, a near ally of Phytophthora, was introduced 

 from Japan. It grew on Gyperus tegetiformis. A case of witches'- 

 brooms on Phyllostachys was due to an ascomycetous fungus, with 

 perithecia on a sclerotium and Cladosporium-like conidia. The authors 

 consider they are dealing with a new genus, Loculistroma. A species of 

 Gloinerella was found on Cyclamens, and on pine-apples Thielaviopsis 

 paradoxa. They treated the fruit with formaldehyde to protect it 

 against infection. 



A leaflet || has been issued dealing with Sclerotinia disease of the 

 Gooseberry. The bush may be attacked on the stem, branches, leaf, or 

 berry ; death follows a severe attack. The disease shows itself by 

 minute tufts of grey-looking Bolrytis fructifications, or by the presence 

 of sclerotia. All dead or dying bushes should be burnt. Spraying has 

 also been proved to be effective. 



Fr. Bubak 1f describes a new disease of Mulberry. Dead branches of 

 the tree had been found to be the substratum of a number of microscopic 

 fungi, among others of a species of Thyrococcum, and, associated with the 

 latter, perithecial bodies, which he has placed in a new genus, Dothiorelliini. 



G. Kock** publishes observations made on the growth of Monilia 

 and of Sphserella senfina (white-spot) on fruit-trees. In the case of both 

 fungi certain varieties of pear were susceptible to the fungi, others were 

 entirely free. The author thinks it possible that the results obtained 

 may be true for one locality only. 



R. Laubertft discusses the nomenclature and life-history of a 

 parasite of apple-trees. There is a Phoma-Wke perithecium, but the 



* Phytopathology, i. (1911) pp. 12-17 (1 fig. and 1 pi.). See also Ann. Mycol., 

 ix. (1911) p. 306. 



t Phytopathology, i. (1911) pp. 18-27. See also Ann. Mycol., ix. (1911) p. 307. 



% Agric. Research Inst. Pusa, Bull. No. 18 (1910). See also Ann. Mycol., ix. 

 (1911) p 307. 



§ U.S. Dep. Agric. Bur. Plant Ind., Bull. No. 171(1910). See also Ann. Mycol., 

 ix. (1011) pp. 308-9. 



Board Agric. Fish., Leaflet No. 318 (8 pis. and 5 figs.). 



i Ber. Deutsch. Bot. Gesell., xxix. (1911) pp. 70-4 (3 figs.). 



** Zeitschr. Landw. Ver. Oesterr., xiv. (1911) p. 209. See also Bot. Centralbl., 

 cxvi. (1911) pp. G22-3. 



tt Gartenflora, lx. (1911) pp. 76-8. See also Bot. Centralbl., cxvi. (1911) p. 623. 



