Leek Moth

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Leek Moth can be restricted by interspersing leeks between rows of celeriac. Both the leeks and the celeriac benefit from this association, due to a phenomenon known as allelopathy i.e. the leeks are capable of emitting chemicals that inhibit celeriac pests, plus others that will stimulate growth of the celeriac. The celeriac does the same for the leeks.
Try a control experiment by growing leeks and celeriac in separate plots, and then an additional plot, with the the two species interspersed. This doesn’t prevent leek moth, but you will be able to see that it reduces the infection, and the plants that do survive, do better in the company of each other, than they do if grown in separate plots.

• 15 Aug, 2010
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