SYMPOSIA PAPER Published: 01 January 2008

Nozzle-Adjuvant Formulation Interactions: Implications on Herbicide Efficacy


A series of adjuvants were developed to improve herbicide performance when applied through air induction nozzles. A series of research trials were conducted in 2004 and 2005 with clethodim, foramsulfuron, and glyphosate. Efficacy of these herbicides was reduced in over 30 % of all cases when applied through air induction nozzles compared to conventional flatfan nozzles. However, when modified forms of the adjuvants were used, efficacy increased approximately 25 % of cases with glyphosate, 40 % of cases with clethodim, and 90 % of cases with foramsulfuron when using air induction nozzles. A separate series of oil-based adjuvants developed had over 20 % air entrapment whereas conventional oil-based adjuvants had 5 % or less air entrapment when using air induction nozzles. Research conducted in the field in 2005 indicated that these novel formulations may improve herbicide efficacy.

Author Information

McMullan, Patrick
agroTECHNOLOGY Research, Inc., Memphis, TN
Thurman, Steve
Adjuvants Unlimited, Inc., Forney, TX
McManic, Greg
Adjuvants Unlimited, Inc., Germantown, TN
Brigance, Mickey
Adjuvants Unlimited, Inc., Germantown, TN
Price: $25.00
Contact Sales
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Developed by Committee: E35
Pages: 32–37
DOI: 10.1520/STP46605S
ISBN-EB: 978-0-8031-6734-6
ISBN-13: 978-0-8031-3403-4