Experiment Station Record, Volume 16, 1904-1905 Page: 888
xviii, 1255 p. ; ill. ; 24 cm.View a full description of this book.
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888 EXPERIMENT STATION RECORD.
Some pathological and physiological notes on coffee, A. ZIMMERMANN (Meded.
'S Lands Plantentuin, 1904, No. 67, pp. 105, pls. 4; abs. in Bot. Centbl., 96 (1904), No.
40, p. 359).-The results of a prolonged study of coffee diseases and injuries in Java
are given, in which the author notes the injury caused by the insect Pentatoma plebeia
and injuries due to a large number of fungi, among them Hemileia vastatrix, Gloeosporium
coffeanum, Coniothyrium coffee, and Cercospora cqffeicola. He also describes a
destructive disease which is doubtless of-fungus origin but which has not yet been
fully studied. Notes are also given on a disease causing the falling of the flowers of
the coffee, on the variation in the form of fruit, the influence of light on the development
of young coffee plants, etc.
Some cacao diseases in Africa, 0. APPEL and H. F. STRUNK (Centbl. Bakt. u.
Par., 2. Abt., 11 (1904), Nos. 16-18, pp. 551-557, figs. 9; 20-22, pp. 632-637, figs. 4).The
results of extended studies made by the author at the botanical garden at Victoria,
Kamerun, on the diseases of cacao are given. The diseases, due to the following
new species, are described: Diplodina corticola n. sp., Rhabdospora theobromx
n. sp., Discella cacaoicola n. sp., Colletotrichum theobromx n. sp., Piricularia caudata
n. sp., Corymbomyces albus n. gen. and sp., Nectria (Eunectria) camerunensis n. sp.,
and Fusarium theobromx n. sp.
A witches' broom disease of cacao in Surinam, F. A. F. C. WENT ( Verhandl.
K. Akad. Wetensch. Amsterdam, 2. Sec., 10 (1904), No. 3, pp. 40, pls. 6; abs. in Bot.
Centbl., 96 (1904), No. 40, pp. 358, 359).-A peculiar kind of witches' broom of cacao
is described.
The disease appears to attack all parts of the plant, often resulting in the fasciation
of the branches and the formation of mummied fruits. The cause of the disease is
discussed at length. It is believed to be due to a species of Exoascus, and its affinities
with the leaf-curl fungus which attacks many stone fruits are discussed. All
evidences of diseased material should be destroyed to prevent the spread of the
injury.
A disease of red alder, APPEL (Naturw. Ztschr. Land- u. Forstw., 2 (1904), No. 8,
pp. 313-320, figs. 3).-A disease of red alder due to Valsa oxystoma is described.
A similar disease is known in a number of parts of Europe, where it causes considerable
injury locally. In some cases other fungi were associated with the Valsa,
and culture experiments with young plants have shown species of Cystospora, Melanconium,
and Cryptospora sffuusa. The occurrence of this last fungus indicates that
it is not limited in its choice of host plants. The attack of Valsa is often associated
with the injury of insects, especially of Cryptorhynchus lapathi.
Leaf rust of Pinus cembra, D. H. C. SCHELLENBERG (Naturw. Ztschr. Land- u.
Forstw., 2 (1904), No. 6, pp. 233-241, figs. 2).-A description is given of a leaf rust of
Pinus cembra, which the author believes is due to a fungus identical with that which
causes the leaf cast of the white pine. The fungus has been identified as Peridermium
strobi, and its relation with Cronartium ribicola on various species of Ribes as
an alternate generation is described.
A form of Nectria on the white pine, G. QUERITET (Ing. Agr. Gembloux, 14
(1904), No. 16, pp. 803-814).-The occurrence in Belgium of a canker disease of white
pine is noted.
The author attributes this disease to a species of Nectria, and discusses the relation
of the fungus to Nectria ditissima, N. cinnabarina, and N. cucurbitula. The parasite
seems closely related to N. ditissima occurring on the beech tree. The species is
believed to be a generalized one which has developed a form on the white pine.
The relation between the fungus and certain scale insects is discussed at length.
Definite preventive measures to be adopted against this disease are said to be
unknown, but by constantly cutting out the affected parts of the trees the spread of
the disease may be held in check.
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A topical, alphabetically arranged index to volumes 13-25 including experiment station records, publications reviewed, and foreign publications. In has a 'Consolidated Table of Contents' which lists all editorial notes and publications of the experiment stations and Department of Agriculture from the referenced volumes
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United States. Office of Experiment Stations. Experiment Station Record, Volume 16, 1904-1905, book, 1905; Washington D.C.. (https://digital.library.unt.edu/ark:/67531/metadc5038/m1/910/: accessed May 11, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.