Full TGIF Record # 273423
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Web URL(s):http://turf.rutgers.edu/research/abstracts/symposium2016.pdf#page=14
    Last checked: 07/20/2016
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Publication Type:
i
Report
Author(s):McGraw, Benjamin
Author Affiliation:Department of Plant Science, College of Agricultural Sciences, Penn State
Title:The Rutgers model: A cultural approach to minimizing annual bluegrass weevil insecticide applications on putting greens
Section:Plenary presentations
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Meeting Info.:New Brunswick, New Jersey: March 18, 2016
Source:Proceedings of the Twenty-Fifth Annual Rutgers Turfgrass Symposium. Vol. 25, 2016, p. 14.
Publishing Information:New Brunswick, New Jersey: The Center for Turfgrass Science, Rutgers, The State University of New Jersey
# of Pages:1
Keywords:TIC Keywords: Cultural methods; Golf greens; Insect control; Listronotus maculicollis; Mowing height; Ovipositional preferences; Poa annua
Abstract/Contents:"The annual bluegrass weevil, Listronotus maculicollis Dietz. (Coleoptera:Curculionidae) (ABW) is the single most destructive insect pest of golf course turf in the mid-Atlantic and northeastern United Sates and eastern Canadian provinces. However, it remains unknown what impact cultural practices (e. g. mowing, fertilization, and irrigation) have on weevil development, abundance, and turfgrass damage. This void hinders the ability to manage the pest culturally or without intense reliance on chemical insecticides. Larval feeding damage is most severe in short-mown (< 1.25 cm) turf. Damage is common on golf course tees, fairways, and collars, but is rarely observed on golf course putting greens (< 0.38 cm). We sought to determine if ABW are capable of surviving, ovipositing, and developing to damaging stages in a range of putting green heights-of-cut (HOC) and early-season N regimes. A reel mower mounted on a greenhouse bench was used to assess the ability of adults to survive mowing, and to determine a low-end threshold for adult survival. These studies were coupled with observations of adult behavior in the lab and field using time lapse photography to determine periods when adults were present on top of the turf canopy and therefore could be removed by mowers. Finally, male and female weevils were seeded into Poa annua L. research plots and caged cores to determine the likelihood of oviposition, development, and damage expression under different putting green management programs. The results from laboratory and field studies demonstrate that L. maculicollis has the ability to accept and oviposit into host plants maintained at putting green heights. This suggests that L. maculicollis may pose a threat to golf course putting greens, despite the lack of damage observed in these areas. However, significantly more adults were removed from the lowest HOC (30% of infested adults removed at 0.25 cm) than the medium HOC (7% at 0.32 cm) and high HOC (3% at 0.38 cm) mowing treatments. Although L. maculicollis was capable of laying eggs in all three mowing height treatments, we observed more eggs being laid outside the turfgrass stem, than were inside at lower putting green heights. This ovipositing behavior has not been previously documented, and is not known to occur at higher HOC. The consequences of ovipositing outside of the plant remain unknown, though may prove costly to the weevil if they are likely to be exposed to predation or desiccation. Time-lapse video also indicated a clear trend to the diel activity of the weevil. An increase in weevil activity on top of the turf canopy was greatest in the early morning hours (0600 to 0900 hr) or prior to and following the period when lights were activated in the incubator. Our findings and their implications on ABW cultural and chemical management will be discussed."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
McGraw, B. 2016. The Rutgers model: A cultural approach to minimizing annual bluegrass weevil insecticide applications on putting greens. Proc. Rutgers Turfgrass Symp. 25:p. 14.
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http://turf.rutgers.edu/research/abstracts/symposium2016.pdf#page=14
    Last checked: 07/20/2016
    Requires: PDF Reader
    Notes: Item is within a single large file
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