Flight Activity and Susceptibility to Insecticides of Variegated Cutworm, Peridorma saucia (Hubner) Attacking Field Tomatoes in Southwestern Ontario

The Atrium, University of Guelph Institutional Repository

Flight Activity and Susceptibility to Insecticides of Variegated Cutworm, Peridorma saucia (Hubner) Attacking Field Tomatoes in Southwestern Ontario

Show simple item record

dc.contributor.author Scott-Dupree, C.D.
dc.contributor.author Harris, C.R.
dc.contributor.author Moineddin, M.
dc.contributor.author Leboeuf, J.
dc.date.accessioned 2011-04-13T22:36:11Z
dc.date.available 2011-04-13T22:36:11Z
dc.date.issued 2008
dc.identifier.citation Scott-Dupree, C.D., Harris, C.R., Moineddin, M., and Leboeuf, J. "Flight Activity and Susceptibility to Insecticides of Variegated Cutworm, Peridorma saucia (Hubner) Attacking Field Tomatoes in Southwestern Ontario." Journal of the Entomological Society of Ontario 139 (2008): 19-25
dc.identifier.uri http://hdl.handle.net/10214/2625
dc.description.abstract The variegated cutworm, Peridroma saucia (Hübner), is a polyphagous pest that sporadically damages processing field tomatoes in southwestern Ontario. Recent anecdotal reports have suggested that it has developed resistance to pyrethroid insecticides used to control them. The objectives of this study were to acquire information on variegated cutworm flight activity in southwestern Ontario tomato fields and to assess the toxicity of currently registered and novel insecticides to determine if it has developed resistance to them. Pheromone trap data (2006) in Norfolk County suggested 2 peaks of adult flight in field tomatoes - July and August, while in Essex County there were 3 peaks - July, August and September. Direct contact toxicity bioassays were done using larvae from a laboratory culture established at the University of Guelph in late summer 2006 from larvae collected from tomato fields in both counties. Of the 4 insecticides registered for use, lambda-cyhalothrin was most toxic to 3rd-4th instar larvae > permethrin > chlorpyrifos > methomyl. Chlorantraniliprole was most toxic of the reduced risk insecticides tested. Spinosad and metaflumizone, which act primarily as stomach poisons, were less toxic by direct contact. Second instar larvae were most susceptible to permethrin > 3rd-4th > 5th instar. Comparison of results with 1977 published data showed that variegated cutworm had developed low level resistance to methomyl but not to chlorpyrifos or permethrin. Results of the study showed that pyrethroid insecticides will be effective so long as stage of larval development and climatic conditions are considered and insecticides are applied in a manner resulting in the most effective penetration of the plant canopy as possible.
dc.language.iso en en_US
dc.publisher Journal of the Entomological Society of Ontario en_US
dc.subject Pheremone Trap en_US
dc.subject Field Tomatoes en_US
dc.subject Essex County en_US
dc.subject resistance en_US
dc.title Flight Activity and Susceptibility to Insecticides of Variegated Cutworm, Peridorma saucia (Hubner) Attacking Field Tomatoes in Southwestern Ontario en_US
dc.type Article en_US


Files in this item

Files Size Format View
3456789.pdf 310.5Kb PDF View/Open

This item appears in the following Collection(s)

Show simple item record

Search the Atrium


Advanced Search

Browse

My Account