ISSN: 1546-962X
Page Count: 7

Nozzle-Adjuvant Formulation Interactions: Implications on Herbicide Efficacy
McMullan, PM
Manager, Agronomic Research, agroTECHNOLOGY Research, Inc., TN

Thurman, S
Business Manager, Adjuvants Unlimited, Inc., TX

McManic, G
Business Manager, Adjuvants Unlimited, Inc., TN

Brigance, M
Business Manager, Adjuvants Unlimited, Inc., TN

(Received 13 October 2005; accepted 7 July 2006)

Abstract

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 glyphosale, 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.

Keywords:
adjuvant, air induction nozzle, flat fan nozzle, herbicide efficacy, air entrapment, glyphosate, foramsulfuron, clethodim

Paper ID: JAI100395
DOI: 10.1520/JAI100395
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