ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 755 



(New York). Notes are given of the examination of the fungus, and as 

 to the method of stamping it out. 



Gr. Trincheri* publishes a preliminary account of microfungi found 

 on ornamental trees in the botanical gardens at Naples. Several of the 

 species described are new to science. 



(i riff on and Maublanc f give an account of the rapid spread of the 

 oak mildew. They offer several theories as to the origin of the fungus. 

 Either it is an indigenous European form that has taken on a new 

 vitality, or it is an alien form that has been introduced, probably from 

 North America. The authors consider that it cannot be referred to the 

 genus PhyVartinia. 



The same authors % have studied a disease of cocoa affecting the 

 branches and roots. It is caused by the fungus Lasiodiplodia Theobromse 

 previously described under various other names. It is one of the 

 Sphaeropsideas with compound pycnidia. 



In another paper § they describe several new species of parasitic 

 fungi : Golletotrichum Ixorse on the leaves of Ixora ; Dichomera Garpini 

 on branches of Garpinus ; Nsemaspora Jasmini, differing from other 

 species of the genus in the irregular ovoid spores which are pale rose- 

 coloured in the mass ; and Ghsetophoma erysiphoides on leaves of Quercus 

 Ilex. Notes are also given on some previously known fungi. 



A disease of cotton that affected the plantations in Dahomey has 

 been diagnosed by G. Fron || as due to a fungus Phoma Rownii sp.n. 

 When young branches are attacked growth ceases and the branches 

 die off. 



Diseases of beetroot have been specially studied by Griffon and 

 Maublanc.1T Their observations extended over two years, one very dry, 

 the other very rainy, and they were thus able to test the importance of 

 atmospheric conditions. They distinguish three forms of attack by 

 fungi. 1. Rottenness of the heart-leaves caused by various fungi, but 

 due principally to the soil. 2. Disease of the outer leaves : rust 

 (Uromyces Beise), mildew (Peronospora Schachtii), and spots (Gercospora 

 beticola). The leaves are also subject to the depredations of Ramularia 

 beticola. ?>. Diseases of the beetroot caused by Uropldyctk leproides and 

 also by Rhizoctonia and Phoma. Proliferations of the roots is a serious 

 trouble of which the cause is still obscure, but it seems proved that they 

 are not caused by animal or vegetable parasites. 



The same authors ** report on some diseases of the vine, notably 

 mildew, and they recount the experiment of treating it with a wash of 

 sea- or salt-water. It was to a certain extent effective, but it does not 

 kill all the conidia nor the mycelium, and if the solution is too strong the 

 leaves are injured. Black-rot (Guiynardia Bidwellii) is also a trouble- 

 some disease, but less prevalent than mildew, as it requires excessive 

 moisture for its development. 



A disease of the coffee plant f| has been diagnosed by F. H. d'Herelle 



* Rend. R. Accad. Sci. Fis. Mat. Napoli, fasc. 3-4 (1909) 7 pp. See also Ann 

 Mycol., vii. (1909) p. 393. 



t Bull. Soc. Mycol. France, xxv. (1909) pp. 37-50. 

 \ Tom. cit., pp. 51-8 (2 figs.). § Tom. cit.. pp. 59-G3 (3 figs). 



i| Tom. cit., pp. 66-8 (4 figs.). \ Tom., cit., pp. 98-107 (4 figs.). 



** Tom. cit., pp. 140-3, ft Tom. cit., pp. 171-85 (1 pi.). 



