Portal de Periódicos da CAPES

Effect of solution and leaf surface polarity on droplet spread area and contact angle

2015; Wiley; Volume: 72; Issue: 3 Linguagem: Inglês

10.1002/ps.4022

1526-4998

Justin J. Nairn, W. Alison Forster, Rebecca M. van Leeuwen,

Fluid Dynamics and Heat Transfer

Pest Management ScienceVolume 72, Issue 3 p. 551-557 Research Article Effect of solution and leaf surface polarity on droplet spread area and contact angle Justin J Nairn, Justin J Nairn Plant Protection Chemistry NZ Ltd, Rotorua, New ZealandSearch for more papers by this authorW Alison Forster, Corresponding Author W Alison Forster Plant Protection Chemistry NZ Ltd, Rotorua, New ZealandCorrespondence to: W Alison Forster, Plant Protection Chemistry NZ Ltd, PO Box 6282, 49 Sala Street, Rotorua 3043, New Zealand. E-mail: [email protected]Search for more papers by this authorRebecca M van Leeuwen, Rebecca M van Leeuwen Plant Protection Chemistry NZ Ltd, Rotorua, New ZealandSearch for more papers by this author Justin J Nairn, Justin J Nairn Plant Protection Chemistry NZ Ltd, Rotorua, New ZealandSearch for more papers by this authorW Alison Forster, Corresponding Author W Alison Forster Plant Protection Chemistry NZ Ltd, Rotorua, New ZealandCorrespondence to: W Alison Forster, Plant Protection Chemistry NZ Ltd, PO Box 6282, 49 Sala Street, Rotorua 3043, New Zealand. E-mail: [email protected]Search for more papers by this authorRebecca M van Leeuwen, Rebecca M van Leeuwen Plant Protection Chemistry NZ Ltd, Rotorua, New ZealandSearch for more papers by this author First published: 10 April 2015 https://doi.org/10.1002/ps.4022Citations: 15Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Abstract BACKGROUND How much an agrochemical spray droplet spreads on a leaf surface can significantly influence efficacy. This study investigates the effect solution polarity has on droplet spreading on leaf surfaces and whether the relative leaf surface polarity, as quantified using the wetting tension dielectric (WTD) technique, influences the final spread area. Contact angles and spread areas were measured using four probe solutions on 17 species. RESULTS Probe solution polarity was found to affect the measured spread area and the contact angle of the droplets on non-hairy leaves. Leaf hairs skewed the spread area measurement, preventing investigation of the influence of surface polarity on hairy leaves. WTD-measured leaf surface polarity of non-hairy leaves was found to correlate strongly with the effect of solution polarity on spread area. CONCLUSIONS For non-polar leaf surfaces the spread area decreases with increasing solution polarity, for neutral surfaces polarity has no effect on spread area and for polar leaf surfaces the spread area increases with increasing solution polarity. These results attest to the use of the WTD technique as a means to quantify leaf surface polarity. © 2015 Society of Chemical Industry Citing Literature Volume72, Issue3March 2016Pages 551-557 RelatedInformation