204 
Pilzkrankheiten der Pflanzen 
of the malady. The most practical method for prevention consists in 
removing the Cedar trees within a distance of a half mile from the orchard. 
This will prevent serious epidemics although some infection may be borne 
from greater distances. 
Various spray materials were used in the experiments on control. 
A new mixture, copper-1 ime-sulphur, made by adding two pounds of 
copper sulphate to fifty gallons of diluted lime sulphur was the most 
effective. The time of application, rather than the kind of fungicide used, 
was the most important factor. Spraying should be begun shortly after 
the young leaves unfold and be repeated sufficiently often to protect the 
young foliage up to June 10 th. j n some cases it is desireable to spray 
before the trees blossom and in others as soon afterward as possible. 
F. A. Wolf (Auburn, Ala.). 
WALLACE, Errett, Scab Disease of Apples (Cornell Univ. Agr. Stat. 
Bull. 1913, 335, 545-624; figs. 182—185, Pis. I—XI). 
This bulletin consists of a very comprehensive treatment of the Apple 
scab disease. Descriptions and illustrations of the appearance of the 
disease upon leaves, twigs and fruits are given. A study of the morpho¬ 
logy and development of the conidial and perithecial stages was made 
together with studies on discharge of ascospores, conditions governing in¬ 
fection, viability of conidia, etc. The report includes the results of the 
use of various lime sulfur preparations in the control of scab. A complete 
bibliography of this organism and the disease which it produces is appended. 
F. A. Wolf (Auburn, Ala.). 
CRABILL, C. H., Studies on Phyllosticta and Coniothyrium 
occurring on Apple foliage (Virginia Agr. Stat. Rept. [1911/12] 
1913, 95—115; fig. 16). 
Studies of Phyllosticta pirina and Coniothyrium pirinum in pure 
culture show that the two differ in cultural characters and germination 
and color of conidia. Each species is probably composed of several strains 
or subspecies which come true to type from generation to generation. None 
of the strains of these two genera studied are parasitic on Apple leaves 
but follow the attacks of Sphaeropsis malorum as saprophytes or facul¬ 
tative parasites. No evidence of sexual reproduction was secured from the 
growing together of any two strains. F. A. Wolf (Auburn, Ala.). 
KUROSAWA, Gh, Notes on some diseases of Rice and Camphortree 
(MiYABE-Festschrift, Tokio 1911, [47] —[50]). — [Japanisch.] 
1. On the „Naiyake“ of Rice plant (Oryza sativa). Verf. hat 
auf Reispflanzen Helminthosporium Ovyzae Hori et Miyabe gefunden und 
gibt die Diagnose in lateinischer Sprache. — 2. On the Black spot 
disease of Camphortree (Laurus Camphora). Auf dem erkrankten 
Teil von Camphorbäumen hat Verf. Glomerella Cinnamomi und Pestalozzia 
Camphori gefunden. J. Hanzawa. 
MARTELLI, G., L’ Oidtum Tuckeri Berk, e un altro suo parasita 
(il Coccinelide Thea 22 -punctata L.) (Agricolt. Meridion. 1913, 
6, N. 7, 2 pp.). 
Sur des feuilles de Vigne attaquées par Y Oïdium Tuckeri, à Torre- 
grotto (Messina) l’auteur a rencontré l’insecte Thea 22 -punctata et il 
