期刊
PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY
卷 102, 期 1, 页码 19-29出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.pestbp.2011.10.004
关键词
Nano-emulsions; Glyphosate; Alkylpolyglucosides; Fatty acid methyl esters; Eleusine indica
资金
- Graduate Research Fellowship (GRF)
- Universiti Putra Malaysia (UPM)
- Ministry of Science, Technology and Innovation (MOSTI) [03-01-04-SF0090]
This article describes the development of environmentally friendly nano-emulsion system for water-soluble herbicide application. Pseudoternary phase diagrams were established in the emulsion system of fatty acid methyl esters (FAMEs)/alkylpolyglucosides (APG) and/or 3-(3-hydroxypropyl)-heptamethyltrisiloxane (organosilicone)/water encompassed with 41% (w/w) glyphosate isopropylamine (IPA) as herbicide active. Pre-formulations were selected from isotropic (L) region in the phase diagrams and their emulsion system characteristics were determined. The microemulsion systems were chosen and then dispersed into water using low-energy stirring method (200 rpm for 5 min). Oil-in-water (O/W) nano-emulsions were formed with particle sizes of diameter less than 200 nm. The nano-emulsion systems showed significantly lower surface tension than a commercial formulation (Roundup (R)). In the biological application study, treatments of nano-emulsion formulations and Roundup (R) were applied on narrow-leaved weed Eleusine indica. Multiple doses of glyphosate IPA of the treatments were applied for the construction of dose-response curves for determination of effective close (ED50). The nano-emulsion formulation showed lower ED50 was 0.40 kg a.e./ha in controlling the weed than Roundup (R) was 0.48 kg a.e./ha. This finding suggested that the possibility of using nano-emulsion system to increase penetration and uptake of glyphosate IPA. (C) 2011 Elsevier Inc. All rights reserved.
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