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Weed Seed Response to Methyl Isothiocyanate and Metham

Published online by Cambridge University Press:  12 June 2017

John R. Teasdale and
Ray B. Taylorson
John R. Teasdale
Affiliation:
U.S. Dep. Agric., Agric. Res. Serv., Weed Sci. Lab., Beltsville, MD 20705
Ray B. Taylorson
Affiliation:
U.S. Dep. Agric., Agric. Res. Serv., Weed Sci. Lab., Beltsville, MD 20705
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Abstract

Methyl isothiocyanate (MIT) consistently killed large crabgrass [Digitaria sanguinalis (L.) Scop. # DIGSA] seed at concentations of 4.0 mM or greater. Concentrations of 0.6 to 1.0 mM MIT delayed germination of large crabgrass seed but ultimately allowed the majority of seed to germinate. Dormant large crabgrass seed were killed at concentrations of MIT similar to those required to kill nondormant seed. MIT stimulated germination of dormant large crabgrass seed at sublethal concentrations (0.1 to 1.0 mM). Experiments with metham (sodium methyldithiocarbamate) in the greenhouse and field (metham rapidly degrades to MIT in soils) confirmed results of laboratory experiments with MIT.

Keywords

GerminationdormancyDigitaria sanguinalisDIGSA

Information

Type
Weed Biology and Ecology
Information
Weed Science , Volume 34 , Issue 4 , July 1986, pp. 520 - 524
Copyright
Copyright © 1986 by the Weed Science Society of America 

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References

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