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A Rapid, Sensitive Soil Bioassay for Sulfonylurea Herbicides

Published online by Cambridge University Press:  12 June 2017

Shay L. Sunderland ,
Paul W. Santelmann  and
Todd A. Baughman
Shay L. Sunderland
Affiliation:
Dep. Agron., Oklahoma State Univ., Stillwater, OK 74078
Paul W. Santelmann
Affiliation:
Dep. Agron., Oklahoma State Univ., Stillwater, OK 74078
Todd A. Baughman
Affiliation:
Dep. Agron., Oklahoma State Univ., Stillwater, OK 74078
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Abstract

The concentration of three sulfonylurea herbicides in soil was determined by a modified petri dish bioassay procedure. The method involved planting pregerminated seed of selected species in petri dishes containing 65 to 100 g of treated soil and measuring the radicle lengths after 24 h. Chlorimuron was detected in two soils at 0.002 μg g–1 using either corn, sorghum, or sicklepod as the assay species. Chlorsulfuron and CGA-131036 were detected in soils at 0.001 μg g–1 using corn, and chlorsulfuron was detected at the same level using sicklepod. In contrast to other methods, the bioassay procedure described could be completed in 48 h, including pregermination of the seed, growth of the plants on treated soil, and plant measurements.

Keywords

Corn, Zea mays L. ‘Funk G4673A’sorghum, Sorghum bicolor L. Moench. ‘Funk 522A’sicklepod, Cassia obtusifolia L. # CASOBchlorimuron, 2-[[[[(4-chloro-6 - methoxy - 2 - primidinyl)amino]carbonyl]amino]sulfonyl]benzoic acidchlorsulfuron, 2-chloro-N-[[(4 - methoxy - 6 - methyl - 1,3,5 - triazin-2-yl)amino]carbonyl]benzenesulfonamideCGA-131036, 2,2 - (2-chloroethoxy) - N - [[(4-methoxy-6-methylamino]carbonyl]benzenesulfonamideAssaychlorsulfuronchlorimuronCGA-131036Zea maysSorghum bicolorCassia obtusifoliaCASOB
Type
Special Topics
Information
Weed Science , Volume 39 , Issue 2 , June 1991 , pp. 296 - 298
Copyright
Copyright © 1991 Weed Science Society of America 

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References

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