Fungi, Bacteria und Pathologie. — Bryophyten 199 



PuTTEMANS, Arenio, Molestias de alfafa en S.Paulo [Maladies 

 de la luzerne k S. Paulo]. (Extrait de la „Revista Agricola". 

 N°s 119, 120, 121. S. Paulo 1905. 23 pp. Avec 17 fig. dans le 

 texte.) 



La luzerne, dont la culture est si importante dans la Republique 

 Argentine, est encore assez souvent cultiv^e dans l'Etat de 

 S. Paulo, mais comme eile n'y resiste que deux ä trois ans (au 

 lieu de 10 ä 15 ans), sa culture est peu remundratrice. M. Putte- 

 mans est d'avis que la moindre resistance de cette plante dans le 

 climat de S. Paulo est, au moins en partie, due ä l'action de 

 diff^rents parasites, dont il fait Tönumeration d'apres des observations 

 personnelles. L'auteur decrit et figure les parasites suivants qu'il a 

 observ^s ä S. Paulo: Ciiscuta epithymum Murr., Pseiidopeziza 

 Trifolii Fuck. f. medicaginis Lib., Uromyces striaiiis Schroet., Pleo- 

 sphaerulina Briosiana Poll. f. brasiliensis Pütt. n. f. et le n^matode 

 Tylenchus devastatrix, les deux derniers ayant etd signales pour la 

 premiere fois au Bresil par l'auteur. Comme la piupart de ces 

 parasites (ä I'exception du premier) sont difficiles ä eviter ou ä 

 combattre directement, l'auteur conseille de diriger l'attention sur 

 une culture m^thodique, appropriee aux exigences particulieres de 

 la luzerne, sur lesquelles il donne des indications pratiques (p. 11 

 — 14). Le Peronospora trifoliorum de Bary, Erysiphe communis 

 Wallr. et Rhizoctonia Medicaginis DC. n'ont pas encore öte con- 

 states ä S. Paulo comme parasites de la luzerne. 



J. Huber (Parä). 



Stuart, Wm., Disease resistance of potatoes. (Vermont 

 Agric. Expt. Stat. Bull. CXXII. p. 107—136. 1906,) 



A large collection of potatoes have been listed for one season 

 at the Vermont Experiment Station for resistance to blight on the 

 rives, rot of the tubers, and scab of the tubers. A sandy and a 

 dry soil were used to more thoroughly list thern. The early blight 

 did but little damage to any variety. The late blight first appeared 

 on August 10 but did not progress much until September when it 

 gained in headway and continued to the end of the month. Barring 

 „Rust Proof" all of the varieties showing high ■ resistance were of 

 German and Dutch origin. Five of the ten varieties showing high 

 resistance had 20''/o or less of their foliage affected. Eleven varieties had 

 95"/o or more diseased. The results show that Solanum Commersoni 

 is not disease resistant under our conditions. A number of varieties 

 showing marked resistance to vine blight were also comparatively 

 free from tuber rot. The Dutch, German and English-Scotch varieties 

 showed much less rot than the French and American ones. 

 Varieties of an upright habit with firm, hairy, median sized leaves 

 are apt to be most resistant to blight. Hybrids of several species 

 show high resistance but slight formation of tubers, their value lying 

 in use for imparting qualities to well known cultivated varieties. 

 The tables show the results in detail. Perley Spaulding. 



Levier, E., Appunti di briologia italiana. (Bull. Soc. bot. ital. 

 Firenze 1905. Primo elenco (Musci frondosi) p. 115 — 125. Secondo 

 elenco (Musci frondosi) p. 145 — 158. Terzo elenco (Musci frondosi 

 ed Epatiche) p. 206—216.) 



Dans ces contributions l'auteur donne des indications relatives 

 ä environ 150 especes de Musci frondosi et 36 espfeces 



