Pest Management Science (2013) 69, 104-111

Chaw Jiang Lim, Mahiran Basri, Dzolkhifli Omar, Mohd Basyaruddin Abdul Rahman, Abu Bakar Salleh and Raja Noor Zaliha Raja Abdul Rahman (2013)
Green nanoemulsion-laden glyphosate isopropylamine formulation in suppressing creeping foxglove (A. gangetica), slender button weed (D. ocimifolia) and buffalo grass (P. conjugatum)
Pest Management Science 69 (1), 104-111
Abstract: BACKGROUND: Pesticides are developed with carriers to improve their physicochemical properties and, accordingly, the bioefficacy of the applied formulation. For foliar-applied herbicide, generally less than 0.1% of the active ingredient reaching the target site could reduce pesticide performance. Recently, a carrier of nanoemulsion consisting of oil, surfactant and water, with a particle size of less than 200 nm, has been shown to enhance drug permeability for skin penetration in pharmaceutical delivery systems. In the present work, the aim was to formulate a water-soluble herbicide, glyphosate isopropylamine (IPA), using a green nanoemulsion system for a biological activity study against the weeds creeping foxglove, slender button weed and buffalo grass.
RESULTS: The nanoemulsion formulations displayed a significantly lower spray deposition on creeping foxglove (2.9-3.5 ng cm⁻²), slender button weed (2.6-2.9 ng cm⁻²) and buffalo grass (1.8-2.4 ng cm⁻²) than Roundup^® (3.7-5.1 ng cm⁻²). The visible injury rates of weeds treated with the nanoemulsion formulations were statistically equivalent to those relating to Roundup^® at 14 days after treatment, with a control range of 86.67-96.67%.
CONCLUSION: It was hypothesised that the significant difference in spray deposition with equal injury rates can be attributed to enhanced bioactivity of the nanoemulsion formulations. This initial discovery could be the platform for developing better penetration of agrochemical formulations in the future.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Dzolkhifli Omar

Research topic(s) for pests/diseases/weeds:
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Paspalum conjugatum (weed)	Oil palm (Elaeis guineensis)	Malaysia
	Asystasia gangetica (weed)	Oil palm (Elaeis guineensis)	Malaysia