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The fungicidal properties of certain spray-fluids, V

Published online by Cambridge University Press:  27 March 2009

W. Goodwin ,
H. Martin  and
E. S. Salmon
W. Goodwin
Affiliation:
(Research Department, South-Eastern Agricultural College, Wye, Kent.)
H. Martin
Affiliation:
(Research Department, South-Eastern Agricultural College, Wye, Kent.)
E. S. Salmon
Affiliation:
(Research Department, South-Eastern Agricultural College, Wye, Kent.)
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Extract

(1) A solution of dicalcium hydrogen arsenate at a strength of 0·0125 per cent. As2O5 was fungicidal to the conidial stage of Sphaerotheca Humuli, while at 0·006 per cent. As2O5 it was not quite fungicidal.

(2) Lime casein containing calcium hydroxide when added as a spreader to calcium arsenate was shown to reduce the fungicidal properties of the calcium arsenate spray.

(3) A solution of calcium thioarsenate at a strength equivalent to 0·006 per cent. As2O5 was fungicidal to the above fungus, while at 0·003 per cent. As2O5 it was below fungicidal strength.

(4) It is suggested that the increased fungicidal properties of the mixed lime sulphur-lead arsenate spray are due to the presence of calcium thioarsenates.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 19 , Issue 3 , July 1929 , pp. 405 - 412
Copyright
Copyright © Cambridge University Press 1929

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References

REFERENCES

(1)Eyre, J. V. and Salmon, E. S. “The Fungicidal Properties of Certain Sprayfluids.” J. Agric. Sci. (1916), 7, 473–507.CrossRefGoogle Scholar
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(6)Goodwin, W. and Martin, H. “An Investigation of the Chemical Changes taking place in the mixed Lime Sulphur-Lead Arsenate Spray.” J. Agric. Sci. (1925), 15, 307–326.CrossRefGoogle Scholar