Pflanzenkrankheiten. 121 



Bailey, B. A., Note on American Gooseberry Mildew. 

 (Ann. Applied Biology. II. Nos 2 and 3. p. 162—165. July 1915.; 



Records an instance of diseased Seedling Gooseberry plants 

 remaining free from disease after removal in November to a new 

 plot, and States that this confirms Salmon's view that the perithecia 

 fall from the bushes in summer and early autumn and that ofthose 

 which remain in the winter very few are viable. 



The mildew in another plot examined by the author appeared 

 first on the upper leaves and he suggests that the greater ränge of 

 temperature or other similar factors experienced by the upper 

 branches may perhaps account for this. E. M. Wakefield (Kew). 



Belgrave, W. N. C, On Diseases of Plum trees caused 



by some species of Cytospora. (Ann. Applied Biology. II. Nos 



2 and 3. p. 183-194. July 1915.) 



A dieback disease of cultivated Plum trees is described from 



which the fingus Cytospora leucostigma, or a very closely allied 



species was isolated. Pycnidia and spores, similar to those occur- 



ring in nature, were obtained in artificial cultures but infection ex- 



periments were not successful. A füll account of the cultural work 



is given from which it is shown that spores only germinate in the 



presence of organic nitrogen. E. M. Wakefield (Kew). 



Brierly, W. B., On a case of recovery from Mosaic Di- 

 sease of Tomato. (Ann. Appl. Biol. IL W 4. p. 263-266. 1916.) 



A tomato-plant suffering from mosaic disease withered, and all 

 the leaves and the Upper part of the shoot were cut away. Subse- 

 quently three new shoots developed from the stem, all of which 

 appeared perfectly normal. In order to test the true character of 

 the disease, virus from the old withered leaves was inoculated into 

 healthy tomato seedlings. Mosaic appeared in five cases out of 

 nine whereas the seven remaining controls remained perfectly 

 healthy. With virus from the new shoots, however, no Symptoms 

 of mosaic were produced, — hence \hey were undoubtedlj'- quite 

 free from disease. E. M. Wakefield (Kew). 



Brooks, F. T., Observations on some Diseases of Planta- 

 tion Rubber in Malaya. (Ann. Appl. Biol. II. N" 4. p. 209 — 

 226. 3 pl. 1916.) 



The author gives notes of his own observations on the diseases 

 of Hevea hrasiliensis in the Federated Malay States. The fun- 

 gus paraSites dealt with are Farnes lignosus, KL, Polyponis rngulo- 

 sus, Lev., Sphaerostübe repens, B. & Br., Hymenochaete noxia, B., 

 Ustiilina Sonata (Lev.) Sacc, Botryodiplodia Theohromae Pat., Phyl- 

 losticta ramicola, Petch, Gloeosporhim alborubrum , Petch, and Threda 

 Blights, a fruiting stage of one of which was named Cyphella 

 Heveae, Massee 



Polyponis rugulosiis was found under circumstances which sug- 

 gested its parasitism, but inoculation experiments are wanting. It 

 has not previously been recorded on rubber. 



Other Hevea diseases commented upon are Bark diseases, 

 Burrs, Cephaleuros sp. on leaves, and Loranthus ssp. Under the 



