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Nitrogen Fertilizer, Oil, and Surfactant Adjuvants with Nicosulfuron

Published online by Cambridge University Press:  12 June 2017

John D. Nalewaja ,
Tadeusz Praczyk  and
Robert Matysiak
John D. Nalewaja
Affiliation:
North Dakota State University, Fargo, ND 58105
Tadeusz Praczyk
Affiliation:
North Dakota State University, Fargo, ND 58105
Robert Matysiak
Affiliation:
North Dakota State University, Fargo, ND 58105
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Abstract

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.

Keywords

Nicosulfuron, 2-[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl] amino]sulfonyl]-N,N-dimethyl-3-pyridinecarboxamidelarge crabgrass, Digitaria sanguinalis (L.) Scop. # DIGSAyellow foxtail, Setaria glauca (L.) P. Beauv. # SETLUAmmonium nitrate28% nitrogennonionic surfactantssodium bicarbonateUANureaHLB, hydrophilic-lipophilic balanceUAN, 28% nitrogen fertilizer containing urea and ammonium nitrate
Type
Research
Information
Weed Technology , Volume 12 , Issue 4 , December 1998 , pp. 585 - 589
Copyright
Copyright © 1998 by the Weed Science Society of America 

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