How to translate text using browser tools
1 October 2013 Insecticide Susceptibility of Three Species of Cutworm (Lepidoptera: Noctuidae) Pests of Grapes
Michael J. Smirle, Cheryl L. Zurowski, D. Thomas Lowery, Ayman M. Mostafa
Author Affiliations +

Climbing cutworms in the genus Abagrotis are economically important pests of grapes in the Okanagan Valley of British Columbia (BC). Grapes are recently introduced into many areas of the region, and the association between crop and pest is new and still evolving. This has led to limited information being available on pest management strategies, including the evaluation of chemical controls compatible with local production practices. Few insecticides are currently registered in Canada for cutworm control on grapes, and our study was initiated to provide information on the efficacy of potential control materials. We were also interested in the relative susceptibilities of the three most common cutworm species attacking grape buds in BC—Abagrotis orbis (Grote), Abagrotis reedi Buckett, and Abagrotis nefascia (Smith). Dose-response bioassays with nine insecticides were conducted on neonate larvae using Bok Choy leaf disks, and on fourth-instar larvae using diet incorporation. There were considerable differences in the toxicity of insecticides within species for neonates and fourth instars. For some materials, the relative toxicity to neonates and fourth instars were not correlated. Response to insecticides among the three species showed variation as well, and correct identification of the species complex present in individual locations is important in choosing the best available control material.

Michael J. Smirle, Cheryl L. Zurowski, D. Thomas Lowery, and Ayman M. Mostafa "Insecticide Susceptibility of Three Species of Cutworm (Lepidoptera: Noctuidae) Pests of Grapes," Journal of Economic Entomology 106(5), 2135-2140, (1 October 2013).
Received: 5 March 2013; Accepted: 26 June 2013; Published: 1 October 2013

This article is only available to subscribers.
It is not available for individual sale.

grape pest management
insecticide toxicity
Get copyright permission
Back to Top