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1 July 2006 Enhancing Herbicide Selectivity with Water-Repellent Adjuvants
ERIC A. NELSON, DONALD PENNER
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Abstract

The objectives of this research were to determine if adjuvants with water-repellent properties could reduce herbicide retention on foliage, and thereby absorption, of the spray solution and to determine if herbicide activity was maintained with a reduction in herbicide retention. Water-repellent adjuvants, DC 2-1322, DC 1-6184, and DC 772, were evaluated with three herbicides, isoxaflutole, pendimethalin, and flumioxazin, and on three crop species, cabbage, tomato, and wheat. The water repellents DC 2-1322 and DC 772 were ineffective with these herbicides and these crop species. DC 1-6184 effectively reduced spray retention for all three herbicides evaluated, regardless of formulation, on all three species. The efficacy of DC 1-6184 was more evident if the spray application was restricted to the plant foliage. The water-repellent DC 1-6184 has potential to decrease injury while maintaining weed control with certain herbicides.

Nomenclature: Flumioxazin; isoxaflutole; pendimethalin; cabbage, Brassica oleracea L. ‘Megaton F1’; tomato, Lycopersicon esculentum Mill., ‘Sunny hybrid’; wheat, Triticum aestivum L. ‘Harus’.

Additional index words: Retention, surfactant.

Abbreviations: CS, capsule suspension; DAT, days after treatment; EC, emulsifiable concentrate; SC, soluble concentrate; WDG, water-dispersible granule.

ERIC A. NELSON and DONALD PENNER "Enhancing Herbicide Selectivity with Water-Repellent Adjuvants," Weed Technology 20(3), 677-681, (1 July 2006). https://doi.org/10.1614/WT-05-101R1.1
Published: 1 July 2006
JOURNAL ARTICLE
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