摘要:

AbstractCompounds such as resins or phenols produced by the host in response to wounding or fungal penetration may play an important role as factors of resistance againstFomes annosus. By extracting stem sections, that were kept for different intervals in a closed chamber, with different organic solvents chloroform produced the most inhibitory extractives againstF. annosus. This may explain at least partially the decreasing stump selectivity forF. annosus.Three compounds were isolated from the neutral fractions of chloroform extractives from 24 days wounded wood discs which were found to be different from the compounds in normal and 12 days fractions. Spectrophotometric analyses reveal some characteristics of these isolated compounds, whereas their chemical formula and structure need further investigation.

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1980.tb00001.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

AbstractTransmission electron microscopic observations of C.ulmishow that there are three distinct types of the hyphae and three distinct layers forming the nscocarp peridium. The cellular organelles of the hyphae and ascocarp peridial layers are described.

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1980.tb00002.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1980.tb00003.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

AbstractThe effect of water extracts of leaf and needle litter from different forest trees on the mycelial growth and the germination rate of conidia of Fomes annosus (Fr.) Cke.Litter extracts from various forest trees and stands have distinct effects on mycelial growth and germination rate of conidia ofFomes annosus. The effects depend on concentration of the extract, period of extraction and on date of collecting the litter samples.

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1980.tb00004.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

AbstractA new inoculation method for testing the resistance of poplars to bacterial canker caused byXanthomonas populisubsp.populi(Ridé) Ridé&Ridé is discussed. The procedure is based on a more natural infection method and involves spraying plants in spring with bacterial suspensio

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1980.tb00005.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

AbstractTwo new species ofSclerophomaHöhn. are described from dieback of Douglas‐fir (Pseudotsuga menziesii[Mirb.] Franco) in British Columbia, Canada, viz.S. xenomerian. sp. (conidialXenomeris abietisBarr), andS. semenosporan. sp. Morphological and cultural characteristics are compared withS. pithyophila(Corda) Höhn., another common species in the same disease syndr

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1980.tb00006.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

AbstractBy light microscope investigations published in the year 1940 the basidiospores ofHeterobasidion annosumwere described as echinulate and skew, the conidia as smooth or nearly smooth and less skew; for the height of the echinulations an approximate measurement was given. By SEM the same differences between the two spore types have been demonstrated recently, but the height found for the echinulations may be too low.

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1980.tb00007.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1980.tb00008.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

Books reviwed in this article:G. E. RUSSEL:Plant Breeding for Pest and Disease Resistance.MARSH, R. W., Ed.:Systemic Fungicides. 2nd ed. London and New York: Longman Group Ltd., 1977.PERRING, F. H.; MELLANBY, K.:Ecological Effects of Pesticides.C. RAMEL (ed.):Chlorinated Phenoxy Acids and their Dioxins.BOS, L.:Symptoms of virus diseases in plants.FRÖHLICH, G. (Hrsg.):Phytopathologie und Pflanzenschutz.SACHS, L.:Angewandte Statistik: statist. Methoden und ihre Anwendung.COWAN, S.T.:A Dictionary of Microbial Taxonomy.ULRICH, B.; MAYER, R.; KHANNA, P.K.:Deposition von Luftverunreinigungen und ihre Auswirkungen in Waldökosystemen im Sollin

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1980.tb00009.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY