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Nozzle-Adjuvant Formulation Interactions: Implications on Herbicide Efficacy

McMullan, Patrick M.
Manager,agroTECHNOLOGY Research, Inc.,TN,

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

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

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


Pages: 6    Published: Jan 2008


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Source: STP1478-EB


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 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.


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

Paper ID: STP46605S
Committee/Subcommittee: E35.12
DOI: 10.1520/STP46605S
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