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| Leek Moth |
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Moth
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Damage to leeks and onions generally appears in May-June and again by a second more prolific generation, in August-October.
The problem is recognized by the white or brown patches caused by leaf-mining caterpillars they also bore into the stems of leeks and bulbs of onions.
The caterpillars are pale yellowish-green with brown heads and up to 12mm (½”) long.
When fully fed, they emerge and pupate inside net-like silk cocoons spun on the foliage.
There is no effective insecticide available to the amateur gardener.
Growing plants under horticultural fleece will prevent the moth laying their eggs on the crop.
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