ISSN:0003-4746    

DOI:10.1111/j.1744-7348.1919.tb05288.x

出版商:Blackwell Publishing Ltd    

年代:1919

数据来源: WILEY

ISSN:0003-4746    

DOI:10.1111/j.1744-7348.1919.tb05289.x

出版商:Blackwell Publishing Ltd    

年代:1919

数据来源: WILEY

摘要:

Summary.An emulsion containing the equivalent of 0.4 per cent. copper sulphate, (CuSO4. 5H2O) can be made by mixing solutions of copper sulphate and soft soap, and this exhibits preventive action against the attacks of the potato blight fungus.In conclusion, we should like to thank Dr Eyre, who indicated the possibility of preparing an emulsion by the method adopted, and at whose suggestion the above experiments were carried out.

ISSN:0003-4746    

DOI:10.1111/j.1744-7348.1919.tb05290.x

出版商:Blackwell Publishing Ltd    

年代:1919

数据来源: WILEY

摘要:

SUMMARY.A disease of cultivated mushrooms is described in which patches of a chestnut brown colour so disfigure the pileus as to render the affected crop quite unmarketable.The disease is identical with that described in America by Tolaas, but left unnamed by him.The cause of the disease is a small bacterial parasite which may possibly be a strain ofPseudomonas fluorescensand may prove to be identical with the organism which produces Pear‐blossom Blight.Until its identity is established by further experiment it seems well to give it a distinguishing mark, and the namePseudomonas Tolaasiis suggeste

ISSN:0003-4746    

DOI:10.1111/j.1744-7348.1919.tb05291.x

出版商:Blackwell Publishing Ltd    

年代:1919

数据来源: WILEY

ISSN:0003-4746    

DOI:10.1111/j.1744-7348.1919.tb05292.x

出版商:Blackwell Publishing Ltd    

年代:1919

数据来源: WILEY

摘要:

SUMMARY.1. Certain seedlings of the wild hop when grown in the greenhouse are persistently immune to the attacks of the mildewSphaerotheca Humuli.This immunity has been shown by the same individual seedling for three consecutive years. Under the same cultural conditions other seedlings of the same parentage prove to be very susceptible.2. Certain seedlings (Group 2) which are immune when grown in the greenhouse are also immune when grown in the open. These seedlings have retained this immunity after four years' residence in a hop‐garden under normal conditions of cultivation and manuring.3. Certain seedlings (Group 3) which are immune when grown in the greenhouse are susceptible when grown in the hop‐garden; in some cases the susceptibility shown is of the highest grade.4. “Cuts” taken from the seedlings of Group 3 in the same year in which the seedling proved to be susceptible in the hop‐garden are immune in the greenhouse under cultural conditions in which “cuts” taken from other susceptible seedlings in the hop‐garden are very susceptible.5. Certain seedlings (Group 4) are semi‐immune to the attacks of the mildew.6. One seedling (of American ancestry) grown in the greenhouse was immune throughout the season in 1916 and very su

ISSN:0003-4746    

DOI:10.1111/j.1744-7348.1919.tb05293.x

出版商:Blackwell Publishing Ltd    

年代:1919

数据来源: WILEY

ISSN:0003-4746    

DOI:10.1111/j.1744-7348.1919.tb05294.x

出版商:Blackwell Publishing Ltd    

年代:1919

数据来源: WILEY

ISSN:0003-4746    

DOI:10.1111/j.1744-7348.1919.tb05295.x

出版商:Blackwell Publishing Ltd    

年代:1919

数据来源: WILEY

ISSN:0003-4746    

DOI:10.1111/j.1744-7348.1919.tb05296.x

出版商:Blackwell Publishing Ltd    

年代:1919

数据来源: WILEY

ISSN:0003-4746    

DOI:10.1111/j.1744-7348.1919.tb05297.x

出版商:Blackwell Publishing Ltd    

年代:1919

数据来源: WILEY