Full TGIF Record # 107584
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Web URL(s):http://usgatero.msu.edu/v04/n18.pdf
    Last checked: 11/03/2005
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Author(s):Braman, S. Kristine; Duncan, R. R.; Hanna, W. W.; Engelke, M. C.
Author Affiliation:Braman: Professor, Entomology, University of Georgia, Griffin; Duncan: Turf Ecosystems, L.L.C., Boerne, Texas; Hanna: Professor, Crop and Soil Sciences Department, University of Georgia, Tifton; Engelke: Professor, Turfgrass Breeding, Texas A&M University, Dallas
Title:Fall armyworm response to insecticides: Influence of turf type
Source:USGA Turfgrass and Environmental Research Online. Vol. 4, No. 18, September 15 2005, p. [1-11].
# of Pages:13
Publishing Information:Far Hills, NJ: United States Golf Association, Green Section
Keywords:TIC Keywords: Spodoptera frugiperda; Responses; Insecticides; Choice of cultivar; Host plant resistance; Insect control; Integrated Pest Management; Chlorpyrifos; Isouron; Halofenozide; Genetic resistance; Application rates; Zoysia; Cynodon; Paspalum
Cultivar Names:TifEagle; TifSport; Sea Isle I; Cavalier; Palisades
Trade Names:Spinosad
Abstract/Contents:"University of Georgia research is evaluating the potential for resistance to multiple insect pests among turfgrasses for the southeastern US. Their research examines the potential to integrate turf with varying levels of resistance with other IPM strategies including chemical and biological control. Results to date include: The residual activity of six concentrations of chlorpyrifos, spinosad, and halofenozide on fall armyworm, Spodoptera frugiperda, as mediated by five warm- season turfgrass cultivars expressing varying levels of genetic resistance was evaluated in greenhouse trials. Similarly, varying concentrations of halofenozide were applied to six turfgrass cultivars in the field; mortality of first and third- instar fall armyworms was assessed. Reduced rates of chlorpyrifos resulted in lower fall armyworm survival on resistant zoysiagrass cultivars relative to that on bermudagrass or paspalum. In a separate trial, when treated with spinosad, survival on the same zoysiagrasses was equal to or greater than that on more susceptible bermuda or paspalum. Reduced rates of halofenozide resulted in lower survival on resistant zoysiagrasses at some concentrations at 7, but not at 14 days exposure compared to more susceptible grasses. In the field, at the full labeled rate of halofenozide, 100% mortality was observed regardless of turfgrass cultivar. Larval survival on the most susceptible turf, 'TifEagle', was higher than that on the remaining turf cultivars at the intermediate rate applied. Larvae exposed to treated turf as third instars displayed a trend toward greater survival at intermediate rates on the two paspalums,' Sea Isle 1' and 561-79, while a trend toward lower survival was observed on 'Palisades' and 'Cavalier' zoysiagrasses. Factors potentially contributing to the variation in responses observed in the present study include different modes of action of insecticides, host-plant resistance mechanisms, differential foliar consumption rates, and insecticide dose in relation to body weight. Development of guidelines for pest management practitioners must address the complexity of potential interactions and may require “case by case” evaluations."
See Also:Other Reports from this USGA research project: 2000-04-171
Note:Translated reprint appears in Greenkeepers, 44 Julio 2012, p. 58-63, with translated title "Respuesta de la rosquilla a los insecticidas: La influencia de la variedad de césped", Lang: Spanish
Summary as abstract
Pictures, color
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Braman, S. K., R. R. Duncan, W. W. Hanna, and M. C. Engelke. 2005. Fall armyworm response to insecticides: Influence of turf type. USGA Turfgrass Environ. Res. Online. 4(18):p. [1-11].
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    Last checked: 11/03/2005
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MSU catalog number: SB 433 .A1 A65 [online]
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