Droplet size spectra and drift effect of two phenmedipham formulations and four adjuvants mixtures

• Published in: Crop protection Vol. 25; no. 12; pp. 1238 - 1243
• Main Authors: Stainier, C., Destain, M.-F., Schiffers, B., Lebeau, F.
• Format: Journal Article Web Resource
• Language: English
• Published: Elsevier Ltd 01.12.2006; Elsevier
• Subjects: Adjuvant; Agriculture & agronomie; Agriculture & agronomy; Drift; Droplet size; emulsifiable concentrate formulation; equipment design; Formulation; Life sciences; Nozzle; nozzles; pesticide adjuvants; pesticide formulations; Pesticides; phenmedipham; Sciences du vivant; spray drift; surfactants; suspension concentrate formulation; Drift; Droplet size; Adjuvant; Nozzle; Formulation; Pesticides
• ISSN: 0261-2194; 1873-6904; 1873-6904
• DOI: 10.1016/j.cropro.2006.03.006

The effect of 4 adjuvants on two formulations of phenmedipham (EC and SC) applied with three types of hydraulic nozzles (hollow cone, flat fan and air induction) was evaluated using a wind tunnel to determine spray drift potential (DP). The volume median diameter (VMD) and the percentage by volume of droplets less than 100 μm diameter was determined using a Malvern particle size analyser. In a wind tunnel DP was measured between 2 and 6 m downwind of the nozzle on glass fibre collectors using a fluorescent tracer. The EC formulation produced a smaller VMD and larger DP than the SC formulation irrespective of any effect due to adjuvants. DP increased as the proportion of small droplets increased.