Biology and development of Acrolepiopsis assectella (Lepidoptera: Acrolepiidae) in eastern Ontario.

Mason, P.G., Appleby, M.E., Juneja, S., Allen, J.K., and Landry, J.-F. (2010). "Biology and development of Acrolepiopsis assectella (Lepidoptera: Acrolepiidae) in eastern Ontario.", The Canadian Entomologist, 142(4), pp. 393-404. doi : 10.4039/n10-026  Access to full text


Leek moth, Acrolepiopsis assectella, recently became established in the Ottawa Valley, where it significantly damages garlic, leek, and onion (Allium L., Liliaceae) crops. At a threshold of 7 °C, populations in eastern Ontario require 444.6 day-degrees to develop from egg to adult. Pheromone-trap data identify spring, early-summer, and late-summer flight periods of overwintered 1st- and 2nd-generation adults, respectively. Depending on ambient temperatures, the life cycle takes 3-6 weeks in the field, with three generations possible. Management strategies such as application of reduced-risk foliar insecticides and use of row covers require precise timing to target appropriate life-cycle stages. Implementation windows can be determined by incorporating pheromone-trap data and ambient air temperature into a life-cycle development model. A proposed integrated pest management program will involve the use of pesticides, mechanical barriers, and classical biological control.

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