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Effects of Solarization on Soil Weed Seed Populations

Published online by Cambridge University Press:  12 June 2017

Leon C. Standifer,
Paul W. Wilson and
Rhonda Porche-Sorbet
Leon C. Standifer
Affiliation:
Dep. Hortic., La. Agric. Exp. Stn., Baton Rouge, LA 70803
Paul W. Wilson
Affiliation:
Dep. Hortic., La. Agric. Exp. Stn., Baton Rouge, LA 70803
Rhonda Porche-Sorbet
Affiliation:
Dep. Hortic., La. Agric. Exp. Stn., Baton Rouge, LA 70803
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Abstract

Clear and black polyethylene mulches were placed over raised seed beds in four studies during a 3-yr period. At intervals during treatment times of up to 12 weeks, soil samples were taken and the recovered seed were tested for germination. The number of seed killed and depths to which they were killed varied with species. The study included natural seed populations of annual bluegrass (Poa annua L. ♯3 POAAN), barnyardgrass (Echinochloa crus-galli (L.) Beauv. ♯ ECHCG), annual species of Cyperus, dayflower (Commelina communis L. ♯ COMCO), and goosegrass (Eleusine indica L. Gaertn. ♯ ELEIN). After 40 days exposure under clear mulch, seed of dayflower were killed to a depth of 11 cm. Under the same conditions, seed of annual Cyperus sedges and barnyardgrass were killed only in the upper 3 to 4 cm. After 3 weeks under clear plastic, germinable seed of goosegrass were recovered only at depths greater than 5 cm. Seed in plots under clear polyethylene mulch were killed more quickly than those in plots covered with black polyethylene mulch.

Keywords

Polyethylene mulchseed germinationsoil temperaturesPOAANECHCGCOMCOELEIN

Information

Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 32 , Issue 5 , September 1984, pp. 569 - 573
Copyright
Copyright © 1984 by the Weed Science Society of America 

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References

Literature Cited

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