Nitrogen fertilizer, oil, and surfactant adjuvants with nicosulfuron

Urea and ammonium nitrate are components of 28% nitrogen liquid fertilizer (UAN) that is often used as an adjuvant in addition to surfactants or oils with herbicides. Ammonium nitrate and/or UAN fertilizer enhancement of nicosulfuron phytotoxicity to large crabgrass or yellow foxtail depended upon t...

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Bibliographic Details
Published in:Weed technology 1998, Vol.12 (4), p.585-589
Main Authors: Nalewaja, J.D, Praczyk, T, Matysiak, R
Format: Article
Language:English
Subjects:
adjuvants
ammonium nitrate
Ammonium nitrates
Biological and medical sciences
Chemical control
Digitaria sanguinalis
Fundamental and applied biological sciences. Psychology
Herbicides
Nitrogen
Nitrogen fertilizers
oils
Parasitic plants. Weeds
Petroleum
Phytopathology. Animal pests. Plant and forest protection
Phytotoxicity
Polysorbates
Quaternary ammonium compounds
Setaria pumila
Sodium bicarbonate
species differences
Surfactants
synergism
urea
Weeds
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Summary:Urea and ammonium nitrate are components of 28% nitrogen liquid fertilizer (UAN) that is often used as an adjuvant in addition to surfactants or oils with herbicides. Ammonium nitrate and/or UAN fertilizer enhancement of nicosulfuron phytotoxicity to large crabgrass or yellow foxtail depended upon the associated oil or surfactant adjuvant. Ammonium nitrate reduced the effectiveness of most block copolymers but not other surfactants with nicosulfuron for large crabgrass. Urea never enhanced and often reduced surfactant and oil adjuvant enhancement of nicosulfuron. Ammonium nitrate or UAN, but not urea, enhanced nicosulfuron phytotoxicity to yellow foxtail when the spray carrier contained sodium bicarbonate. These research results indicated that enhancement of nicosulfuron efficacy from UAN is mainly from the ammonium nitrate component. However, the benefit to nicosulfuron from UAN or ammonium nitrate depended upon the associated surfactant or oil adjuvants.
ISSN:0890-037X
1550-2740
DOI:10.1017/s0890037x00044419