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Leaching and Degradation of dl-Strigol in Soil

Published online by Cambridge University Press:  12 June 2017

Andrew I. Hsiao ,
A. Douglas Worsham  and
Donald E. Moreland
Andrew I. Hsiao
Affiliation:
Agric. Can. Res. Stn., Box 440, Regina, SK, Canada S4P 3A2, Crop Sci. Dep., Agric. Res., U.S. Dep. Agric., N.C. State Univ., Raleigh, NC 27650
A. Douglas Worsham
Affiliation:
Agric. Can. Res. Stn., Box 440, Regina, SK, Canada S4P 3A2, Crop Sci. Dep., Agric. Res., U.S. Dep. Agric., N.C. State Univ., Raleigh, NC 27650
Donald E. Moreland
Affiliation:
Agric. Can. Res. Stn., Box 440, Regina, SK, Canada S4P 3A2, Crop Sci. Dep., Agric. Res., U.S. Dep. Agric., N.C. State Univ., Raleigh, NC 27650
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Abstract

Leaching of dl-strigol at six rates between 0.3 and 4.5 kg/ha through columns of sandy loam soil was estimated using a witchweed [Striga asiatica (L.) Kuntze # STRLU] germination bioassay. After 21 days of leaching daily with 1.27 cm of simulated rainfall, about 86% of the applied chemical remained in the top 2.5 cm of the soil, about 6% in the zone between 2.5 and 7.5 cm, and less than 1% in the soil at depths between 7.5 and 30 cm. However, even with the lowest rate of the chemical application, sufficient dl-strigol was leached to a soil depth between 22.5 and 30 cm to cause most, if not all, of the witchweed seeds to germinate. These results suggest that dl-strigol has a potential for use as an effective tool for a witchweed control or eradication program. No significant degradation of the chemical occurred in moist soil during the 21-day period.

Keywords

Parasitic plantsgermination simulationweed controlstrigol movementSTRLU
Type
Research Article
Information
Weed Science , Volume 31 , Issue 6 , November 1983 , pp. 763 - 765
Copyright
Copyright © 1983 Weed Science Society of America 

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References

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