摘要:

AbstractThis work reports results of mycelial yield ofTrichoderma viridefrom a number of carbon and nitrogen sources and different C:N ratios. The ratios were in two series: first by increasing the carbon content (d‐glucose as standard), second – by decreasing the nitrogen content (1‐as‐paragine as standard). The best mycelium production was found on d‐xylose and glucose as C sources and KNO3and 1‐asparagine as N sources. Increase in dosage of both sources caused increase in yield but different changes in pH, according to how nutrients we

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1977.tb00563.x

出版商:Blackwell Publishing Ltd    

年代:1977

数据来源: WILEY

摘要:

AbstractBeech (Fagus sylvatica L.) bark disease, caused by Cryptococcus fagi Bär. II. The progress of the disease.The progress of the disease can be divided into 7 phases. The chances of recovery of diseased trees are poor if extensive areas of the tree have been attacked byCryptococcus fagiBär. and are moderate to good if the attacked areas are small and not numerou

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1977.tb00564.x

出版商:Blackwell Publishing Ltd    

年代:1977

数据来源: WILEY

摘要:

AbstractThree pine species, each with different climatic requirements, were found to be susceptible to three collections ofCronartium flaccidumfrom sea level, hills, and mountains of central Italy. There was, however, a highly significant interaction between the three host species and rust collections from the different geographic areas.

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1977.tb00565.x

出版商:Blackwell Publishing Ltd    

年代:1977

数据来源: WILEY

摘要:

AbstractThis paper reports the identification of fatty acids in elm wood and its active extractives triggering coremia formation, their distribution between bark, sapwood and heartwood of elms, and their occurrence in the mycelium of the pathogen.

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1977.tb00566.x

出版商:Blackwell Publishing Ltd    

年代:1977

数据来源: WILEY

摘要:

AbstractIn stands of Lodgepole pine over 6 years old, 68% of stems in Climatic Zones A and B, characterised by a relatively short growing season, and 63 % of stems in Climatic Zone C were infected byCrumenula sororia. On individual trees, the number of stem whorls showingC. sororiainfection increased significantly with increasing stand elevation and with decreasing exposure in crops on Alberta and Shuswap Lake provenances over 30 years old, whereas in Shuswap, Long Beach and Vancouver Island stands less than 30 years old, increasing elevation and decreasing exposure had little effect on numbers of infected whorls. The numbers of infected whorls were not related to compartment aspect in crops of Alberta provenance, whereas in stands of Shuswap Lake, Long Beach and Vancouver Island provenances, W, SW and S‐facing compartments showed fewer infections. In contrast the numbers of active cankers showed a positive correlation with increasing compartment elevation and exposure. In Zones B and C, cankers were concentrated on Northerly and Westerly aspects of individual stems. The evidence suggests that particular climatic regimes in different zones of the tree and in different ages of crop may be critical in determining the success of failure of infection by C.sorori

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1977.tb00567.x

出版商:Blackwell Publishing Ltd    

年代:1977

数据来源: WILEY

摘要:

AbstractThe first record of infection ofPopulus albavar.hickelianaby the American rust,Melampsora medusaeThum. is reported. The morphology of uredospores of rust onP. albais compared with that of otherMelampsoraspp. infecting white poplars. The implications of these observations for the widespread establishment in the future of white × black hybrid poplars are discussed

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1977.tb00568.x

出版商:Blackwell Publishing Ltd    

年代:1977

数据来源: WILEY

摘要:

Books reviwed in this article:Baker, K. F.; Cook, R. J.: Biological control of plant pathogens.Einfluß von Luftverunreinigungen auf die Vegetation.Hoffmann, G. M.; Nienhaus, F.; Schönbeck, F.; Weltzien, H. C; Wilbert, H.:Lehrbuch der Phytomedizin.Forest Nursery Diseases in the United StatesG. W. Petersonand R. S. Smith, Jr.Kranz, J. (ed.):Epidemics of plant diseases.Hartig, R.:Important diseases of forest treesContributions to mycology and phytopathology for botanists and foresters. English translation by Merril, D. H. Lambertand W. Lie

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1977.tb00569.x

出版商:Blackwell Publishing Ltd    

年代:1977

数据来源: WILEY