摘要:

AbstractThe Occurrence of the Perfect Stage of Potebniamyces coniferarum (Hahn) Smerlis on Douglas Fir. The perfect stage ofPotebniamyces coniferarum(Hahn) Smerlis is recorded onPseudotsuga menziesii(Mirb.) Franco. This is both the first record of apothecia in Germany and also on this host. Identity of the fungus is based both on disease symptoms and comparison of fruit bodies and ascospores with published descriptions. Identity was confirmed by the production of the imperfect stage (Phacidiopycnis pseudotsugae) on malt agar and on sterilised twigs of Douglas fir, pine and larch.

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1972.tb00353.x

出版商:Blackwell Publishing Ltd    

年代:1972

数据来源: WILEY

摘要:

AbstractThe effect of unsterile soil leachates on the colonisation byArmillaria melleaof cylinders ofPinus patulaandCupressus lusitanicawas studied and is discussed with relevance to East Africa.

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1972.tb00354.x

出版商:Blackwell Publishing Ltd    

年代:1972

数据来源: WILEY

摘要:

AbstractA contribution to the knowledge of the parasitic imperfect fungi of the genus Pollaccia on poplars. The generic namePollaciawas used in 1937 by Baldacciand Ciferrifor the single (type) speciesPollaccia radiosa(Lib) Bald. et Cif. the well known leaf‐spotting fungus onPopulus.In 1939 Servazzidifferentiated two species ofPollacciaonPopulus(P. radiosa[Lib.] Bald. et Cif. andP. elegansServ.).During a study of various collections; in Herb. (BRA, HBG, BP, DAOM, L, W, CUP, BUCA, PR, WA, ZT, CL, BRNU, FH, WSP) the occurrence of four different species of the genusPollaccia (P: radiosa, P. elegans, P. ramulosa and P. americana) was recognise

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1972.tb00355.x

出版商:Blackwell Publishing Ltd    

年代:1972

数据来源: WILEY

摘要:

AbstractTenFomes annosusisolates from pine and ten from non‐pine‐hosts were subjected to the volatile components of pine oleoresin and to various concentrations of pinosylvin (PS) and pinosylvin monomethyl ether (PSM). Both the volatiles and the PS and PMS significantly reduced growth rate compared with controls. However, no detectable difference existed between the two groups ofF. annosusisolates in their reactions to the substances tes

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1972.tb00356.x

出版商:Blackwell Publishing Ltd    

年代:1972

数据来源: WILEY

摘要:

AbstractThe Influence of site factors on the Germination of Fomes annosus conidiospores. Cultures grown up on a source with an easily utilisable C‐source produce conidia with a lower germination rate. An easily utilisable C‐source in the medium promotes germination. Different strains vary individually in their germination behaviour in respect to temperature. Short‐time‐strains have an optimum between 12–28°C, longtime‐strains have a peak at about 24°C. Some strains tend to suddenly alter their germination rate at a lower or higher temperature, thus increasing the plasticity of the fungus.Germination behaviour with regard to pH is strainspecific. The optima lie between pH 4,0–6,5. The pH influences the germination rate more than the nutrients status of the soil. The standard deviations in germination behaviour for some soils are large. Between the various origins of strains there are no signific

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1972.tb00357.x

出版商:Blackwell Publishing Ltd    

年代:1972

数据来源: WILEY

摘要:

AbstractSeveral isolates fromg Canada and Europe ofNectria fuckelianavar.fuckelianaand ofN. fuckelianavar.macrosporawere compared physiologically, morphologically, and in their ability to cause cankers onAbiesspecies.As a result, it is proposed to raise these varieties to species level, that is,Nectria fuckelianaandN. macrospora. Isolates ofN. macrosporafrom Quebec were found to be much more virulent than the other isolates studied.

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1972.tb00358.x

出版商:Blackwell Publishing Ltd    

年代:1972

数据来源: WILEY

摘要:

AbstractThe in vitro culture of alpine conifers. Seeds of European larch, Scots pine, Mugo pine and Norway spruce were sterilized for 30 min in a bath of 30% hydrogen peroxide.Similarly, seeds of Swiss stone pine, of which the tegument had been removed with a little vice, were sterilized for 15 min.Germination and a sterility test were undertaken on malt‐agar. Finally, the seeds were transplantedin vitroon two media for mycorrhizal synthesi

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1972.tb00359.x

出版商:Blackwell Publishing Ltd    

年代:1972

数据来源: WILEY

摘要:

AbstractAnisogramma virgultorum, a pathogenic Ascomycete on Betula pubescens. A sexual form of this Diaporthaceous fungus, consisting only of isolated perithecia was found on the youngest twigs. It is compared with the stromatic form which is more frequent. The systemic disease caused by this organism is expressed by a necrosis and the development of canker‐like growths. Perhaps, because of unsuccessful isolation and cultural development, the fungus is an obligate parasit

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1972.tb00360.x

出版商:Blackwell Publishing Ltd    

年代:1972

数据来源: WILEY

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1972.tb00361.x

出版商:Blackwell Publishing Ltd    

年代:1972

数据来源: WILEY

摘要:

Books reviwed in this article:Molecular Biology, Biochemistry and Biophysics, Vol. 10. Lukens, R. J.:Chemistry of Fungicidal ActionHepting, G. H.:Diseases of Forest and Shade Trees of the United StatesWartenberg, A.:Systematik der niederen PflanzenWheeler, B. E. J.:An Introduction to Plant DiseasesCummingG. B.:The Rust Fungi of Cereals, Grasses and BamboosBibliographie der Pflanzenschutz‐LiteraturNeur Folge, Band 7, Heft 1 (bearb. von W. Lauxunter Mitarbeit von W. Sickerund D. BlumenbachGriffin, D. M.:Ecology of soil fungiJohnson, L. F., and Curl, E. A.:Methods for research on the ecology of soil‐borne plant pathogensBooth, C.:The Genus FusariumAnnual Review of Phytopathology. Bd. 9. Hrsg. J. G. Horsfall, K. F. Bakerand G. A. Zent

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1972.tb00362.x

出版商:Blackwell Publishing Ltd    

年代:1972

数据来源: WILEY