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The Effects of Diallate and Its Isomers on the Growth of Wild Oats

Published online by Cambridge University Press:  12 June 2017

F. H. A. Rummens ,
D. C. M. Rummens-Ditters  and
A. E. Smith
F. H. A. Rummens
Affiliation:
Dep. of Chem. and Dep. of Mathematics, Univ. of Regina, Regina (Sask.), S4S 0A2, Canada
D. C. M. Rummens-Ditters
Affiliation:
Dep. of Chem. and Dep. of Mathematics, Univ. of Regina, Regina (Sask.), S4S 0A2, Canada
A. E. Smith
Affiliation:
Dep. of Agr., Regina Research Station, Box 440, Regina (Sask.), S4P 3A2, Canada
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Abstract

The growth of germinating wild oat seedlings (Avena fatua L.) in soil treated with a range of concentrations of the individual isomers of diallate [S-(2,3-dichloroallyl)diisopropylthiocarbamate] and mixtures thereof has been studied. on the basis of diallate concentration required to reduce height by 50%, the cis isomer is less effective than the trans isomer by about 65%. A mixture of 42% trans and 58% cis diallate is shown to exhibit an antagonistic effect of about 95%. The trans isomer is more effective than the 42/58 mixture by a factor of 2.6. It is shown that height vs concentration response curves can be represented by y = A {(x/C)B + 1}-1, where y = height and x = concentration. A computer program has been developed to find the best parameters A, B, and C from any set of individual response data. A new technique for calculating synergism or antagonism has been employed in the part dealing with mixtures of diallate.

Type
Research Article
Information
Weed Science , Volume 23 , Issue 1 , January 1975 , pp. 11 - 14
Copyright
Copyright © 1975 by the Weed Science Society of America 

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References

Literature Cited

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