摘要:

AbstractThe stemwood ofPinus densiflorawas found to be more resistant than the stemwood ofPinus rigida × radiatain inhibiting the decaying activity and linear growth ofFomes annosus. The chemical factors responsible for the variations in resistance were extractable in chloroform. One fraction isolated from the chloroform extract ofP. densiflorais responsible for its inhibition

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1979.tb00682.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

AbstractTuberculina maximawas observed in late August in a plastic greenhouse on seedlings ofPinus sylvestrisinoculated withMelampsora pinitorqua.Apparent lack of this association in nature may be due to time difference in development ofM. pinitorquaaecia on pine and in dispersal ofT. maximaspores. Aecia ofM. pinitorquanormally develop between mid‐June and late Jul

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1979.tb00683.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

AbstractA risk classification for beech (Fagus grandifoliaEhrh.) based on tree characteristics before the onset of the beech bark disease indicated that the crown widths in relation to DBH of trees that died were narrower than the crowns of survivors. Quantitative information on beech trees in the central Adirondack Region of the New York State before and during the development of the beech bark disease was available which included repeated measurements (1954–1976) of fifteen tree variables on 417 beech trees. A risk classification was developed which separated the trees by diameter and condition with a high (0.6), medium (0.3), and low (0.05) relative probability of mortality. The classification should improve the ability to separate those trees that are apt to die within a short period of time From those trees which are apt to surviv

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1979.tb00684.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

AbstractBasidiospores and conidia ofHeterobasidion annosum(Fomes annosus) were examined by light and scanning electron microscopy (SEM). Light microscopy did not allow for accurate and reliable separation between the two spore types. Contrarily, SEM clearly demonstrated that conidia have relatively smooth surfaces whereas basidiospores are consistently ornamented with numerous echinulations. SEM also demonstrated a definite dissimilarity in the shape and location of the apicular structures on basidiospores and conidia. With these differences now apparent, attempts can be made to examine airborne inoculum ofH. annosumfor the presence, absence, and/or relative abundance of the two spore types. Additional Key Words: Ultrastructure; spore ornamentation.

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1979.tb00685.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

Schmidt‐vogt, H.:Die Fichte.Ein Handbuch in 2 Bänden, Band 1: Tazonomie, Verbreitung, Okologie, Waldgesellschaften. Mit Beiträgen v. G. Jahn, F. Kral und D. Vogellehner.Koch, W.; Hurlw, K.:Grundlagen der Unkrautbekämpfung.(Uni‐Taschenbücher, Bd. 513).Lanier, L.; Joly, P.; Boudoux, P.; Bellemere, A.;Mycologie et Pathologie Forestière.I. Mycologie forestière.Grunewaldt‐Stöcker, G.; Niehaus, F.:Mycoplasma‐ähnliche Oraganismen als Krankheitserreger in Pflanzen.Kraemer‐Koeller, G.:Die Technik der Gebietsuntersuchung und der botanischen Differentialdiagnosen bei eventuell schädlichen Fluorimmissionen.Dissertationes Botanicae. Bd. 43.Gräser, H.:Biochemie und Physiologie

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1979.tb00686.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY