Pilzkrankheiten der Pflanzen 
147 
HANZAWA. J., On the Sclerotinia- diseases of Peanut [Avachis 
hypogaea ] (MiYABE-Festschrift, Tokio 1911, 213—220; pl. 20—22). 
Verf. hat zwei neue Sclerotinia- Arten: S. Arachidis und 5. Miya- 
beana auf Erdnuß in Japan gefunden, mit ihr wohl eingeführt. Diagnostik 
wie folgt: S. Arachidis mit Bo/ryfos-Stadium, Scleiotien klein und 
dünn der Oberfläche der Stengel anhaftend, 1—2 Apothecien aus einem 
Sclerotium, trichterförmig ohne Höhlung in der Mitte. Schläuche keulen¬ 
förmig oder cylindrisch, gerade oder gebogen, 140—loO X 7—8 p, 
Schlauchsporen abgeplattet, oval, verjüngt, 11—14x6—7 p .» mit Para- 
physen. — S. Miyabeana ohne Botrytis , in den Stengeln größere Scle¬ 
rotien, Apothecien wie voriger Art. Schläuche keulenförmig, gerade 
oder gebogen, 120—170 X 10—15 [i. Sporen abgeplattet, lO-iöXo-Tit, 
hyalin* Paraphysen vorhanden. Microconidien klein, kugelig, 3,b 5,2 [x 
im Durchmesser, auf 7 [X langen Sterigmen. Bildet sehr hübsche und 
große, grüngefärbte geschichtete Appresorien auf Apfelsaft, verflüssigt 
Gelatine, coaguliert Milch und verzuckert Stärke. J. Hanzawa. 
SAVELLI, M., Ricerche intorno ad una forma di Cladosponum 
parassita delle Agave e delle Echeverie (Ann. R. Accad. Agricolt 
Torino 1913, 56, 3 pp.). » 
Description des caractères morphologiques et culturales dune forme 
nouvelle de Cladosporium herbarum parasite sur les feuilles d Agave 
et ÜEcheveria a laquelle l’auteur donne la dénomination: Cladosporium 
herbarum f. Agave-Echeveriae. M. Turconi (Pavia). 
MASSEE, I., The sterilisation of seed (Kew Bull. 1913, 183 187, 
Following the experiments of Pinoy and Magrou, Miss Massee has 
tried the sterilising effect of hydrogenperoxide. Batches of a few 
different kinds of fungus spores treated for half an hour only, showed 
accelerated germination as compared with spores soaked in water foi t îe 
same length of time. The spores of fungi are as a rule killed by an 
hour’s immersion in hydrogen per oxide; no spores experimented with 
germinated after similar treatment for two hours. Two tables are given 
showing the particulars of experiments on various seeds and fungus 
spores. In nearly every instance the germination of treated seeds was 
retarded. Seeds immersed for four hours were on an average one to 
two days later in appearing above ground than untreated seeds of the same 
species. Where seeds were treated for twenty-four hours their growth was 
retarded from two to eight days, or in most cases the seeds were killed 
outright. The period of retardation is much less in quickly-germinating 
seeds than in seeds where germination is normally slow. After treated 
seeds have germinated, growth is rapid, and in a short time the plants 
are equal in size and vigour to the plants from untreated seeds sown at 
the same time. “For all practical purposes, soaking seed in hydrogen- 
peroxide for three hours will kill all superficial fungus spores and the 
seed will not be injured. This method is to be recommended as a sub¬ 
stitute for fumigation, which, as a rule, does not kill fungus ^poies, 
unless continued for such a time as to damage the seed . 
J. Ramsbottom (London). 
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