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Sulfosulfuron and Glyphosate Efficacy with Various Humectants / Z. Woznica, BL. deVilliers, JD. Nalewaja, CG. Messersmith

Conference Author
Pesticide Formulations and Delivery Systems: Meeting the Challenges of the Current Crop Protection Industry (2001 : Dallas, Texas)
Physical Description
1 online resource (10 pages) : illustrations, figures, tables
Additional Creators
Woznica, Z., deVilliers, BL., Messersmith, CG., Nalewaja, JD., American Society for Testing and Materials, and ASTM International
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Summary
Research was conducted in the greenhouse and growth chambers to determine the effect of selected humectants on sulfosulfuron {1-(4,6-dimethoxypyrimidin-2-yl)-3-[(2-ethanesulfonyl-imidazo[1,2-a]pyridine-3-yl)] sulfonylurea}and glyphosate {N-(phosphonomethyl)glycine} efficacy and sulfosulfuron spray deposit characteristics. Humectants were glycerol, sorbitol, ethylene glycol, propylene glycol, various polyethylene glycols, sodium lactate, and calcium nitrate. Sulfosulfuron was applied to green foxtail and glyphosate to wheat, with and without nonionic surfactants, and with and without humectant in distilled water. None of the humectants substantially increased glyphosate efficacy, and sodium lactate and calcium nitrate were antagonistic. In the presence of nonionic surfactant, sodium lactate and calcium nitrate caused the greatest increase in sulfosulfuron efficacy and overcame the reduced sulfosulfuron efficacy associated with low humidity. Sodium lactate and calcium nitrate enhanced sulfosulfuron efficacy regardless of spray mixture pH, but the increase appeared greater at low pH (4.3¿̐ư5) than at high pH (7.7¿̐ư8.2). Scanning electron micrographs showed that spray deposits at low pH contained dry crystals, presumably sulfosulfuron. Sodium lactate gave a liquid-appearing (presumably water) spray deposit. Water retained in sulfosulfuron spray mixture deposits measured on watch glasses was greater with calcium nitrate and sodium lactate than with glycerol, sorbitol, propylene glycol or polyethylene glycol humectants. These data demonstrate the potential for enhancing efficacy of sulfosulfuron by using selected humectants as components of an adjuvant.
Dates of Publication and/or Sequential Designation
Volume 2003, Issue 1430 (January 2003)
Subject(s)
Other Subject(s)
ISBN
9780803154797 (e-ISBN)
9780803134539
0803134533
Digital File Characteristics
text file PDF
Bibliography Note
Includes bibliographical references 14.
Other Forms
Also available online via the World Wide Web. Tables of contents and abstracts freely available; full-text articles available by subscription.
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Also available in PDF edition.
Reproduction Note
Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 2003. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.
Technical Details
Mode of access: World Wide Web.
Source of Acquisition
ASTM International PDF Purchase price USD25.
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