Pyrethroid-Resistance Level Affects Performance of Larvicides and Adulticides From Different Insecticide Classes in Populations of Listronotus maculicollis (Coleoptera: Curculionidae)

The annual bluegrass weevil, Listronotus maculicollis Kirby (Coleoptera: Curculionidae), is a major pest of golf course turf in eastern North America with widespread insecticide resistance. This study examined the effect of pyrethroid-resistance level on the efficacy of adulticides and larvicides fr...

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Bibliographic Details
Published in:Journal of economic entomology 2018-08, Vol.111 (4), p.1851-1859
Main Authors: Koppenhöfer, Albrecht M, Kostromytska, Olga S, Wu, Shaohui
Format: Article
Language:English
Subjects:
annual bluegrass weevil
Chlorpyrifos
Coleoptera
cross-resistance
Curculionidae
Golf
Golf courses
Insecticide resistance
INSECTICIDE RESISTANCE AND RESISTANCE MANAGEMENT
Insecticides
Larvae
Larvicides
Listronotus maculicollis
Organophosphates
Organophosphorus pesticides
Pesticide resistance
Pesticides
Population studies
Pyrethroids
resistance management
Spinosad
Turf
turfgrass
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Summary:The annual bluegrass weevil, Listronotus maculicollis Kirby (Coleoptera: Curculionidae), is a major pest of golf course turf in eastern North America with widespread insecticide resistance. This study examined the effect of pyrethroid-resistance level on the efficacy of adulticides and larvicides from different insecticide classes commonly used for L. maculicollis management through greenhouse and field studies. The tested populations had previously been determined to be susceptible, moderately resistant, resistant, and highly resistant to the pyrethroid bifenthrin. Targeting adults, efficacy was significantly reduced for bifenthrin against the highly resistant population and for the spinosyn spinosad and the oxadizine indoxacarb against the resistant and highly resistant populations. Efficacy of the organophosphate chlorpyrifos was not significantly reduced. No adulticide provided significant control of resistant and highly resistant populations. Targeting larvae, the efficacy of spinosad and the anthranilic diamide cyantraniliprole was marginally reduced against the highly resistant population. Significant reductions in efficacy and no significant control were observed for indoxacarb against the highly resistant population and for the neonicotinoid clothianidin, the anthranilic diamide chlorantraniliprole, and the organophosphate trichlorfon against the resistant and highly resistant populations. Our findings lay the groundwork for management recommendations for populations with different resistance levels. Generally, synthetic insecticide applications should be minimized with greater use of larvicides supplemented with nonchemical control alternatives. The remaining effective larvicides should be rotated using cyantraniliprole, spinosad, and indoxacarb against resistant and cyantraniliprole and spinosad against highly resistant populations.
ISSN:0022-0493
1938-291X
DOI:10.1093/jee/toy142