510 
Fungi, Myxomyceten, Pathologie. 
Appel, O. und W. Kreitz. Der derzeitige Stand unserer 
Kenntnisse von den Kartoffelkrankheiten und ihrer Be¬ 
kämpfung. (Mitt. Kais. Biol. Anst. für Land- und Forstw. Heft 5. 
m. Abb. 1907.) 
Mitteilungen über das Auftreten und die Bekämpfung von: Phy¬ 
tophthora infestans, Schorf, Schwarzbeinigkeit, Dürrfleckenkrankheit, 
Bunt- oder Eisenfleckigkeit, Kräuselkrankheiten, Blattrollkrankheit, 
Bakterienringkrankheit, Fusariumstengelfäule und Knollenfäule. Bei¬ 
gefügt sind Anweisungen über sachgemässes Einmieten der Kar¬ 
toffeln und über Anwendung der Bordeauxbrühe. G. Detmann. 
Arthur, J. C., Cultures of Uredineae in 1907. (Journ. ofMycology 
XIV. p. 7—26. Jan. 1908.) 
This is the eighth of a series of reports by the author upon the 
culture of plant rusts. The work was begun in 1899. Besides the 
work on the grass and sedge rusts, studies were made of a number 
of species of Gymnosporangium. Düring the year 98 collections of 
resting spores were made, and 20 collections with active spores 
were used. From these collections 438 drop cultures were made to 
test the viability of the spores. Of the 98 collections with resting 
spores 29 could not be germinated. Cultures were made with the 
remaining 68 collections. These 68 collections belonged to 47 species 
of rusts. Besides the resting spores, sowings were made of 9 species 
of Gymnosporangium, a few species of Coleosporium, Aecidium and 
Peridermium. Altogether 296 sowings were made on 113 species of 
hosts, and more than two and one half times that number of indi- 
viduals. The host plants were grown in pots under control in the 
greenhouse. 
“The results are divided into negative results, positive results 
with species whose life cycles have already been ascertained by. the 
writer or other investigators, and positive results with species whose 
life cycles are now first placed on record.” 
Of the trials giving negative results the author cites seventeen 
species “to serve for reference in future studies.” One of the most 
elusive of these has been Puccinia on Carex Pennsylvanica Lam. 
Dr. Arthur has made fifty-five sowings of this rust, beginning in 
1903, using for the purpose forty-three species of hosts, and no 
innoculation has yet been effected. 
Twenty-two species were successfully grown including species 
of Puccinia , Uromyces, Phragmidium, and Gymnosporangium. 
The following species were grown in cultures for the first time: 
Puccinia vexans Farl., Puccinia cryptandri Elfis & Barth., Puccinia 
obtecta Beck., Puccinia mutabilis Elfis & Gail., Gymnosporangium 
Betheli Kern, and G. inconspicuum Kern. Besides these species 
Puccinia on Carex stenophylla was grown in cultures for the first 
time for which the following name is submitted: 
Puccinia universalis nom. nov. ( Aecidium Dracunculi Theum., 
not Puccinia Dracunculi Auers.) The species is described in full. 
A name is here given to Puccinia on Carex longiiostris also, which 
is Puccinia Phrymae (Halst.) nom. nov. (. Aecidium Phrymae Halst., 
Journ. of Mycol. II. p. 52, 1886.) This species is also described with 
its several spore forms. 
The report closes with a summary of successful cultures made 
during the season of 1907. The summary is divided into two series, 
