ISSN:0003-4746    

DOI:10.1111/j.1744-7348.1921.tb05529.x

出版商:Blackwell Publishing Ltd    

年代:1921

数据来源: WILEY

摘要:

Summary1Nursery waters in the Lea Valley have been examined and some shown to be an important source of disease.2Contaminated waters may be purified by filtering, boiling and by addition of certain chemicals.

ISSN:0003-4746    

DOI:10.1111/j.1744-7348.1921.tb05530.x

出版商:Blackwell Publishing Ltd    

年代:1921

数据来源: WILEY

摘要:

Summary1The production by the cells ofProtea cynaroídesof a bacteriolysin against the organism which produces a leaf‐spot disease, suggested in a former paper, has not been confirmed.2The bacteria enter the leaf by way of the stomata; the local lesions produced are prevented from spreading by the development of wound cork.3The causal organism succumbs very readily to the desiccation to which it is subjected owing to the cells which it attacks being cut off by the wound cork from their water supp

ISSN:0003-4746    

DOI:10.1111/j.1744-7348.1921.tb05531.x

出版商:Blackwell Publishing Ltd    

年代:1921

数据来源: WILEY

摘要:

Summary1It is shown that if Botrytis spores be exposed to the action of 0–4 per cent, phenol, the spores do not all die simultaneously, but some die in a few minutes and some not till two or three hours have elapsed. The curve showing the numbers surviving at different times has a sigmoid shape.2If the strength of phenol be progressively raised, the curve becomes less and less sigmoid, approaching the logarithmic type of curve.3With the same suspension it is possible to obtain either a logarithmic or a sigmoid curve according to the strength of phenol used.4Both types of curve are shown to be explicable on the assumption that the individual spores differ in resistance and that a frequency curve showing the distribution in the resistance grades approaches the normal curve.5The influence of the number of spores used is shown to be very considerable; and the consecutive transition from the sigmoid to the logarithmic type occurs, whether we raise the phenol strength, keeping the spore number constant, or reduce the spore number keeping the phenol constant, or use younger and younger spore

ISSN:0003-4746    

DOI:10.1111/j.1744-7348.1921.tb05532.x

出版商:Blackwell Publishing Ltd    

年代:1921

数据来源: WILEY

ISSN:0003-4746    

DOI:10.1111/j.1744-7348.1921.tb05533.x

出版商:Blackwell Publishing Ltd    

年代:1921

数据来源: WILEY

ISSN:0003-4746    

DOI:10.1111/j.1744-7348.1921.tb05534.x

出版商:Blackwell Publishing Ltd    

年代:1921

数据来源: WILEY

ISSN:0003-4746    

DOI:10.1111/j.1744-7348.1921.tb05535.x

出版商:Blackwell Publishing Ltd    

年代:1921

数据来源: WILEY

ISSN:0003-4746    

DOI:10.1111/j.1744-7348.1921.tb05536.x

出版商:Blackwell Publishing Ltd    

年代:1921

数据来源: WILEY