Biologically active compounds derived from plants are attractive alternatives to synthetic pesticides, especially with the recent rise in herbicide resistance in weeds and the increased demand for organic crop production. Mustard meal (<i>Sinapis alba</i>), which is a by-product of the biodiesel industry, exhibits herbicidal activity toward a wide range of vascular and non-vascular plants in field and greenhouse settings. Here we present a study on the use of mustard meal extracts to control liverwort (<i>Marchantia p.</i>) in the greenhouse. Mustard meal contains up to 10% by weight of glucosinolates, which in the presence of water enzymatically are converted to a series of products. Using HPLC/TOF MS, HPLC/UV, and IC we investigated the potential biological activity of these products and evaluated the possible synergistic action of these products with other matrix components of mustard meal. We have optimized the preparation scheme and the application of mustard seed meal extracts to achieve liverwort control comparable with commercially used pesticides. In addition to the low cost, mustard meal extracts are 100% biodegradable, they do not promote mold growth in greenhouse settings, and are environmentally friendly.

Mustard meal extract as a natural herbicide for liverwort control

249th National Meeting (2015)

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