ISSN: 1546-962X
Published Online: 29 June 2009
Page Count: 7

The Effect of Adjuvants, Pesticide Formulation, and Spray Nozzle Tips on Spray Droplet Size

Klein, Robert N.
University of Nebraska WCREC, North Platte,402 West State Farm RoadNE

Golus, Jeffrey A.
University of Nebraska WCREC, North Platte,402 West State Farm RoadNE

Nelms, Kelli L.
University of Nebraska WCREC, North Platte,402 West State Farm RoadNE

(Received 29 September 2008; accepted 6 April 2009)

Abstract

Many factors, including adjuvants, pesticide formulations, and nozzle tips, affect spray droplet size. It is important to understand these factors as spray droplet size affects both drift and efficacy of pesticides, which is a main concern with pesticide application. A laser particle analyzer was used to determine the spray droplet size and distributions of a range of formulations sprayed through several types of nozzle tips. Nozzles included were extended range flat fan sizes 11003 and 11005 (Spraying Systems XR), air induction flat fan sizes 11005 and 11004 (AI), air induction extended range flat fan size 11005 (AIXR), preorifice flat fan size 11005 (TT), and a second preorifice flat fan size 2.5 (TF). Several deposition/retention adjuvants were studied, including Array, Interlock, In-Place, and Thrust. Another study looked at diflufenzopyr + dicamba (Status, BASF) in combination with several adjuvants. Also, three fungicides were evaluated at differing spray volumes. Results indicated that the droplet size of some nozzle tips is more affected than others by changes in the contents of the spray solution.

Keywords:
spray droplet size, spray particle distribution, adjuvant

Paper ID: JAI102156
DOI: 10.1520/JAI102156
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