Factors affecting foliar retention of some model adjuvant oil-in-water emulsions
✍ Scribed by Hall, Kirsty J.; Holloway, Peter J.; Stock, David
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 143 KB
- Volume
- 54
- Category
- Article
- ISSN
- 1526-498X
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✦ Synopsis
The foliar retention of dilute oil-in-water emulsions containing three chemical types of adjuvant oil formulated either as ECs or EWs was compared in track-sprayer experiments using the water-soluble tracer, Ñuorescein. Although both types of emulsion enhanced tracer deposition onto water-repellant pea and barley foliage, compared with sprays containing no adjuvant, consistently better retention was achieved using the EW emulsions, irrespective of oil composition. On young plants, Ñuorescein retention using the EC emulsiÐer alone was similar to that from the corresponding emulsions. However, on older plants, retention from EC emulsions was superior to that from the EC emulsiÐer. Comparable e †ects were not observed using the EW stabiliser, which had little inÑuence on the efficiency of spray deposition. The retention behaviour of the various oil-based adjuvants is discussed in relation to their e †ects on spray quality and their formulation ingredients.