Golf Course Management

JAN 2019

Golf Course Management magazine is dedicated to advancing the golf course superintendent profession and helping GCSAA members achieve career success.

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116 GOLF COURSE MANAGEMENT 01.19 For ABW populations with bifenthrin RR 50 s above 50, management efforts should concentrate on larvae, using the remaining ef - fective larvicides: cyantraniliprole, spinosad, indoxacarb, and, if still effective, trichlorfon and chlorantraniliprole. Against populations with bifenthrin resistance RR 50 s above 100, biological, biorational and cultural control al - ternatives in rotation with the remaining ef- fective synthetic insecticides cyantraniliprole, spinosad and, if still effective, indoxacarb should be used to delay further resistance de - velopment. To help implement these management rec - ommendations, we have developed a simple petri dish test using formulated bifenthrin and chlorpyrifos that has sufficient discriminating power, accurately reflects resistance levels and is easy to conduct (3). is test could be used by consultants and diagnostic laboratories to help golf courses determine the resistance level of their ABW populations. Funding is research was funded by the GCSAA and supporting chapters/associations (GCSA of New Jersey, Long Island GCSA, Metropoli - tan GCSA, New Jersey Turfgrass Association, Connecticut AGCS), USGA, New York State Turfgrass Association, O.J. Noer Research Foundation, Rutgers Center for Turfgrass Sci - ence, and USDA National Institute of Food and Agriculture Hatch Multistate projects 0206130 through the New Jersey Agricultural Experiment Station, Hatch Multistate project NJ08295. Acknowledgments e authors also thank the participating golf course superintendents and their clubs for their cooperation. is article was based on a published paper, "Pyrethroid-resistance level affects per - formance of larvicides and adulticides from different insecticide classes in populations of Listronotus maculicollis (Coleoptera: Curcu - lionidae)" by A.M. Koppenhöfer, O.S. Kostro- mytska and S. Wu in 2018 in the Journal of Economic Entomology (111:1851-1859). Literature cited 1. Koppenhöfer, A.M., S.R. Alm, R.S. Cowles, B.A. McGraw, S. Swier and P.J. Vittum. 2012. Controlling annual bluegrass weevil: optimal insecticide timing and rates. Golf Course Management 84(3):98-104. RESEARCH SAYS • When used against ABW adults, the insecticides bifenthrin, chlorpyrifos, indoxacarb and spinosad are similarly affected by resistance, becoming inef- fective at bifenthrin RR 50 s of 95 and above. • When used against ABW larvae, the in- secticides chlorantraniliprole, clothianidin and trichlorfon are similarly affected by resistance, becoming ineffective at bifenthrin RR 50 s of 95 and above. • When used against ABW larvae, the insecticide indoxacarb is ineffective at bifenthrin RR 50 s of 343. • To date, ABW larvae have not shown resistance to the insecticides cyantra- niliprole and spinosad. 2. Kostromytska O.S., S. Wu and A.M. Koppenhöfer 2018. Cross-resistance patterns to insecticides of several chemical classes among Listronotus macu - licollis (Coleoptera: Curculionidae) populations with different levels of resistance to pyrethroids. Journal of Economic Entomology 111:391-398. 3. Kostromytska, O.S., S. Wu and A.M. Koppenhöfer. 2018. Diagnostic dose assays for the detection and monitoring of resistance in adults from Listronotus maculicollis (Coleoptera: Curculionidae) populations. Journal of Economic Entomology 111:2329-2339. 4. McGraw, B.A., and A.M. Koppenhöfer. 2017. A survey of regional trends in annual bluegrass weevil (Coleoptera: Curculionidae) management on golf courses in eastern North America. Journal of Inte - grated Pest Management 8:1-11. Albrecht M. Koppenhöfer (a.koppenhofer@rutgers.edu) is an Extension specialist in the Department of Entomology, Rutgers University, New Brunswick, N.J. Olga S. Kostro - mytska is an Extension assistant professor in the Stock- bridge School of Agriculture, University of Massachussets, Amherst, Mass. Shaohui Wu is a postdoctoral researcher in the Department of Entomology, University of Georgia, Tifton, Ga., and USDA-ARS, Southeast Fruit and Tree Nut Research Unit, Byron, Ga.

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