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The Fungicidal Properties of Certain Spray-Fluids. VII

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. The fungicidal properties of solutions containing sulphur in polysulphide form, viz. sodium, potassium, calcium and barium polysulphides, were tested by application to the conidial stage of Sphaerotheca Humuli growing upon young hop leaves in the greenhouse.

2. Four samples of sodium polysulphide solutions, two prepared in the laboratory and two commercial products, were examined. When applied with 1 per cent. soft soap as the spreader, solutions containing 0·5 per cent. polysulphide sulphur proved fungicidal. With 0·5 per cent. gelatine as the spreader, fungicidal strength did not begin to be attained until the concentration of polysulphide sulphur reached 0·11 per cent. The results suggest that the nature of the spreader may influence the fungicidal properties of polysulphide sulphur.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 20 , Issue 3 , July 1930 , pp. 489 - 497
Copyright
Copyright © Cambridge University Press 1930

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References

REFERENCES

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