| 11. |
The application of the probit method to toxicity test data adjusted for mortality in the controls |
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Annals of Applied Biology,
Volume 31,
Issue 1,
1944,
Page 68-74
D. J. Finney,
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摘要:
When data from toxicity tests have to be adjusted for a mortality rate amongst untreated controls, three modifications to the usual method of probit analysis need to be considered. The full solution is more laborious than that ordinarily used, as it requires the estimation of this mortality rate from the whole of the data. When the rate is. not high (e.g. up to 20 %) a satisfactory approximation may be obtained by a simple alteration in die weighting coefficients, especially if the precaution is taken of using two or three times as many test organisms as controls as for any dosage of the poison, thus decreasing the relative value of the information on natural mortality contributed by the treated batches. The modified weighting coefficients are tabulated for values of the natural mortality from zero to 20 %. An example of the more complex calculations required for the full maximum likelihood solution is discussed in detail.
ISSN:0003-4746
DOI:10.1111/j.1744-7348.1944.tb06210.x
出版商:Blackwell Publishing Ltd
年代:1944
数据来源: WILEY
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| 12. |
The organization and work of the Pest Infestation Laboratory of the Department of Scientific and Industrial Research |
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Annals of Applied Biology,
Volume 31,
Issue 1,
1944,
Page 75-75
G. V. B. Herford,
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ISSN:0003-4746
DOI:10.1111/j.1744-7348.1944.tb06211.x
出版商:Blackwell Publishing Ltd
年代:1944
数据来源: WILEY
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| 13. |
Factors influencing the course of an insect infestation in bulk wheat |
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Annals of Applied Biology,
Volume 31,
Issue 1,
1944,
Page 76-80
T. A. Oxley,
R. W. Howe,
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ISSN:0003-4746
DOI:10.1111/j.1744-7348.1944.tb06212.x
出版商:Blackwell Publishing Ltd
年代:1944
数据来源: WILEY
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| 14. |
The role of the chemist in research on fumigation |
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Annals of Applied Biology,
Volume 31,
Issue 1,
1944,
Page 81-84
W. Burns Brown,
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ISSN:0003-4746
DOI:10.1111/j.1744-7348.1944.tb06214.x
出版商:Blackwell Publishing Ltd
年代:1944
数据来源: WILEY
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| 15. |
Control of the granary weevil with finely ground mineral dusts |
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Annals of Applied Biology,
Volume 31,
Issue 1,
1944,
Page 84-88
E. A. Parkin,
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ISSN:0003-4746
DOI:10.1111/j.1744-7348.1944.tb06215.x
出版商:Blackwell Publishing Ltd
年代:1944
数据来源: WILEY
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Volume 31 issue 1