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Sulphur as a soil fungicide against the potato wart disease organism

Published online by Cambridge University Press:  27 March 2009

W. A. Roach
W. A. Roach
Affiliation:
(Late of Department of Insecticides and Fungicides, Rothamsted Experimental Station; now Biochemist1, East Malling Research Station, Kent.)
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Extract

(1) Thiosulphuric acid has been shown to exist in a free state.

(2) It is relatively stable in dilute solution; an M/200 solution is only half decomposed at the end of 1 day and an M/400 solution at the end of 10 days only.

(3) This degree of stability is sufficient to account for the fungicidal action of acidified thiosulphate solutions in terms of the liberated thiosulphuric acid.

(4) It can be calculated that it is only necessary to assume 6 per cent. of the minimum quantity of sulphur found effective against Wart Disease in the field to be in the form of thiosulphuric acid over a period of 10 days in order to account for its toxicity.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 20 , Issue 1 , January 1930 , pp. 74 - 96
Copyright
Copyright © Cambridge University Press 1930

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References

REFERENCES

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