Alliums Insects Pest Management

Leek Moth Update – 4 July 2013

In 2013, pheromone traps were installed in early April in Brant, Oxford, Perth and Wellington Counties and Waterloo Region. Leek moth were captured at a Waterloo Region site beginning April 22nd – 29th with trap captures continuing until May 15th – 21st for a total of 14 leek moth captured during the first flight period. The second flight period began June 19th– 26th and has continued for the last couple weeks for a total of 6 leek moth captured during this flight period so far.  There are usually three flight periods during the growing season based on data from Eastern Ontario, but there could be 4 generations in the southwestern Ontario or even 5 generations in the extreme southwest portions of the province.

Leek moth larva found feeding inside an onion leaf
Leek moth larva found feeding inside an onion leaf

Please visit for the previous update.

Other Resources

Refer to Ontario CropIPM online at and OMAFRA factsheet—Leek Moth—A Pest of Allium Crops for more information.

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