60 PATHOLOGY [BoT. Absts., Vol. IX, 



397. VoGLiNO, p., E V. BoNGiNi. Malattie riscontrate nel mese di Gennaio. [Diseases 

 observed in January.] Pubbl. Mens. R. Osservatorio Fitopatol. Torino. 2: 2-3. 1919. — The 

 following fungous and bacterial diseases are mentioned: Clasterosporium carpophilum on 

 apricot, cherry, and almond, mulberry root-rot, Septoria limonuyn on lemon, Botrytiscinerea 

 on apple, peach gummosis, »Sep<ona t;erom"cicoio on Veronica formosa, Phoma viticolaaixd Bac- 

 cillus ampelopsorae on grape, Sclerotinia libertiana on carrot, Polydesmus exitiosus on cauli- 

 flower, Septoria dianthi on carsiation, Bremia lactucae on lettuce, Fusariiim solani and Phy- 

 tophthora infestans on potato. — Edith K. Cash. 



398. Weston, William H., Jr. Another conidial Sclerospora of Philippine maize. Jour. 

 Agric. Res. 20: 669-684. PI. 76-78. 1921. — A new species of jScZeros/Jora (/S. spontanea) has 

 been found producing mildew of maize and rarely of sugarcane and bugang grass {Saccharum 

 officinarum) in the Visayan Islands of Cebu, Bohol and Leyte. It is indistinguishable from 

 Sclerospora philippinensis, previously described, in its virulence, host range, and in the symp- 

 toms produced on the various hosts in the field. However, extensive studies of fresh material 

 show this species to be morphologically distinct from S. philippinensis and other oriental 

 forms. Teosinte and Miscanthus japonicus have been infected by inoculation. The author 

 is of the opinion that the oriental downy mildews are native on wild grasses. — H. E. Thomas. 



THE PATHOGENE: BIOLOGY; INFECTION PHENOMENA; DISPERSAL 



399. Rosen, H. R. The behavior of telia of Puccinia graminis in the South. Mycologia 

 13: 111-113. 1921. — Telia of Puccinia graminis as a rule are not abundant in the South, 

 and those which are found are often undersized and fail to develop viable teliospores. The 

 exception noted is the production of normal telia in the fall on Elymus australis. The telio- 

 spores on this host were successfully overwintered and infections were obtained on barberry. — 

 //. R. Rosen. 



400. Walkden, H. The isolation of the organism causing crown gall on Chrysanthemum 

 frutescens in Britain. Ann. Botany 35: 137-138. 1921. — The writer describes an organism 

 isolated from crown gall on Chrysanthemum frutescens. Inoculations on healthy plants 

 reproduced the galls, and the organism was repeatedly re-isolated from the galls produced 

 in this way. The characters of this organism proved identical with those of an authentic 

 culture of Bacterium tumefaciens. — W. P. Eraser. 



401. Wartenweiler, Alfred von. Beitrage zur Systematik und Biologic einiger Plas- 

 mopara-Arten. [Contribution to the taxonomy and biology of some species of Plasmopara.] 

 Ann. Mycol. 16: 249-298. 3 pi., 12 fig. 1918.— As a result of extensive morphological studies 

 of conidia and conidiophores from Plasmopara nivea (Ung.) Schroet., P. pygmaea (Ung.) 

 Schroet., and P. densa (Rabh.) Schroet. from different hosts, P. nivea is separated into 6 

 forms: (a) On various umbellifers, (b) on Anthriscus Silvester and A . cerefolium, (c) on Conium 

 maculatum, (d) on Laserpitium latifolium, (e) on Angelica refr acta, (f) on Peucedamim palus- 

 tre. Plasmopara pygmaea is divided into 4 forms: (a) On Anemone canadensis and A . caroliniana, 

 (b) on Anemone raddeana and A . flaccida, (c) on Astragene alpina, (d) on Anemone hepatica. 

 In P. densa some variations in conidia and conidiophores are found but no division of the 

 species is made. Graphs are given of a large number of spore measurements, mostly from 

 500 to 1000 from each of the different host plants. Mycelium of P. nivea found in the rhizomes 

 of Laserpitium latifolium is described and illustrated. Whether this mycelium is in all cases 

 perennial or not is connected with the question as to the first infection, which has not yet been 

 determined. Other hosts showed no mycelium in rhizomes. The few inoculation experi- 

 ments made were unsatisfactory and mostly negative. It is stated that if a generalization 

 can be madte from this studUy it is that the fungous forms from similar regions are in many, 

 but by no means all, cases similar; but these similar forms do not occur on closely related 

 hosts. — C. L. Shear. 



