Resistance and Cross-Resistance to Four Insecticides in Populations of Obliquebanded Leafroller (Lepidoptera: Tortricidae)

Populations of obliquebanded leafroller, Choristoneura rosaceana (Harris), were collected from organic and conventionally managed orchards located in the Okanagan and Similkameen Valleys of British Columbia. Neonate F1 progeny were assayed for resistance to azinphosmethyl, tebufenozide, methoxyfenoz...

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Bibliographic Details
Published in:Journal of economic entomology 2002-08, Vol.95 (4), p.820-825
Main Authors: Smirle, Michael J, Lowery, D. Thomas, Zurowski, Cheryl L
Format: Article
Language:English
Subjects:
Animals
Azinphosmethyl - pharmacology
benzoylhydrazines
Biological and medical sciences
Chemical control
Choristoneura rosaceana
Control
Fundamental and applied biological sciences. Psychology
Hydrazines - pharmacology
indoxacarb
Insecticide Resistance
INSECTICIDE RESISTANCE AND RESISTANCE MANAGEMENT
insecticides
Insecticides - pharmacology
Juvenile Hormones - pharmacology
Moths - drug effects
Oxazines - pharmacology
Phytopathology. Animal pests. Plant and forest protection
Protozoa. Invertebrates
resistance
Tortricidae
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Summary:Populations of obliquebanded leafroller, Choristoneura rosaceana (Harris), were collected from organic and conventionally managed orchards located in the Okanagan and Similkameen Valleys of British Columbia. Neonate F1 progeny were assayed for resistance to azinphosmethyl, tebufenozide, methoxyfenozide, and indoxacarb using a leaf disk bioassay. Significant differences in resistance levels among populations were observed for all four insecticides. Insects collected from organic sites were more susceptible to all insecticides than were insects collected from conventional sites. Resistance to the benzoylhydrazine insect growth regulators tebufenozide and methoxyfenozide was highly correlated with resistance to azinphosmethyl across populations, indicating cross-resistance between these compounds. The highest levels of resistance were observed with indoxacarb, but resistance levels to indoxacarb did not correlate with those for azinphosmethyl. Dose-response regression lines for tebufenozide were parallel across populations, suggesting that the resistance mechanism(s) were quantitatively, but not qualitatively, different. Cross-resistance between azinphosmethyl and benzoylhydrazine insecticides indicates that a resistance management strategy for obliquebanded leafroller involving the rotation of these materials is not likely to be successful.
ISSN:0022-0493
1938-291X
0022-0493
DOI:10.1603/0022-0493-95.4.820