摘要:

AbstractThis is an introductory paper on the outbreak ofScleroderriscanker of Todo‐fir (Abies sacbalisnensisMast.) in Hokkaido, northern Japan. Symptoms, distribution of the disease, and features of infected plantations are described. The variability of disease intensity is also describe

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1974.tb00421.x

出版商:Blackwell Publishing Ltd    

年代:1974

数据来源: WILEY

摘要:

AbstractOccurrence ofFomes annosusin the soil of spruce stands (Picea abies Karst). In stands of spruceFomes annosuswas found to occur in a viable state in the litter and soil to a depth of 25 cm. Successful isolations were obtained from 153 samples out of a total of 216. In ca. 40% of the 153 samplesFomes annosuscould be isolated from 9 mg of soil; in the remaining samples it was found either in 90 mg, 230 mg or in 900 mg. The results raise the possibility of direct infection of the roots of spruce byFomes annosusfrom the soil.

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1974.tb00422.x

出版商:Blackwell Publishing Ltd    

年代:1974

数据来源: WILEY

摘要:

AbstractThe incidence of dothistroma blight [Dothistroma septospora(Doroguin) Morelet] throughout the world during the last fifteen years is reviewed with particular reference to its economic effects.Impact of the disease has been generally slight in the northern hemisphere, with most severe effects localised in nursery and ornamental stocks in parts of the USA and Canada. In Central and East Africa and New Zealand chronic defoliation has caused serious loss of increment in youngPinus radiata; in Chile outbreaks have been acute and of short duration, causing only slight yield loss.Economic control has been obtained by a well organised copper fungicide spray programme in New Zealand, but this means has proved impracticable in Africa. Experience gained in New Zealand will be valuable when similar problems arise in industrial forest plantations in the future.

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1974.tb00423.x

出版商:Blackwell Publishing Ltd    

年代:1974

数据来源: WILEY

摘要:

AbstractMelampsora medusaeThüm. andM. larici‐populinaKleb. have been recorded in Australia for the first time. Their detection, spread and host range are described.M. medusaehas the wider host range, but occurs mainly onPopulus deltoidesclones and hybrids.M. laricipopulinaoccurs mainly onP. nigravar.italica. Detailed descriptions are given of both rusts, and their geographic distribution listed. The possible effect of these rusts on Australian forestry is discussed, and several other rusts in Australia with known conifer aecial hosts elsewhere are list

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1974.tb00424.x

出版商:Blackwell Publishing Ltd    

年代:1974

数据来源: WILEY

摘要:

AbstractPhysiological studies on variation in resistance of Pinus sylvestris to Lophodermium pinastri. I. Buffer capacity in needles. Studies on the buffering of hydrogen‐ion concentration in needles of resistant and susceptible pines showed that the pH‐value was changed by the growing fungus from about pH 3.7 to 5, The buffer capacity of homogenized needles varied greatly between clones, The change of pH‐value as well as the buffer capacity were significantly different between resistant and susceptible c

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1974.tb00425.x

出版商:Blackwell Publishing Ltd    

年代:1974

数据来源: WILEY

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1974.tb00426.x

出版商:Blackwell Publishing Ltd    

年代:1974

数据来源: WILEY

摘要:

Book reviwed in this article:Butin, H.; Zycha, H.:Forstpathologie.

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1974.tb00427.x

出版商:Blackwell Publishing Ltd    

年代:1974

数据来源: WILEY