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Issue 104, 2016, Issue in Progress
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Chitosan as a rainfastness adjuvant for agrochemicals

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Abstract

Chitosan has been identified as an excellent rainfastness aid for a model agrochemical. We use fluorescent labelling and microscopy to show that chitosan deposits on Vicia faba leaves are able to resist wash off by rain, both in a lab-scale test and via simulated rain. Furthermore, via the same methods it has been demonstrated that the rainfastness of azoxystrobin, a common fungicide which is fluorescently active, can be improved by formulating with chitosan. These findings via fluorescent microscopy were in agreement with a quantitative LC-MS/MS method in which the exact quantity of active ingredient on a leaf surface was determined before and after a rain wash. The potential of chitosan as a rainfastness aid is further supported by positive comparison with a commercial tank-mix standard, with almost 100% retention of the model active ingredient achieved in both cases after 1 hour of washing with 10 mm h−1 intensity rain.

Graphical abstract: Chitosan as a rainfastness adjuvant for agrochemicals

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Publication details

The article was received on 21 Sep 2016, accepted on 18 Oct 2016 and first published on 18 Oct 2016


Article type: Paper
DOI: 10.1039/C6RA23485B
Citation: RSC Adv., 2016,6, 102206-102213
  • Open access: Creative Commons BY license
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    Chitosan as a rainfastness adjuvant for agrochemicals

    Brett L. Symonds, C. I. Lindsay, N. R. Thomson and V. V. Khutoryanskiy, RSC Adv., 2016, 6, 102206
    DOI: 10.1039/C6RA23485B

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