Golf Course Management

JUL 2017

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

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07.17 GOLF COURSE MANAGEMENT 65 Society for Horticultural Science 115:602-604. 7. Reinert, J.A., M.C. Engelke and J.J. Heitholt. 2011. Hunting billbug (Coleoptera: Curculionidae) resis - tance among zoysiagrass (Zoysia spp.) cultivars. Florida Entomology 94:613-621. 8. Vittum, P.J., M.G. Villani and H. Tashiro. 1999. Turf - grass insects of the United States and Canada. 2nd edition. Cornell University Press, Ithaca, N.Y. Michael E. Patterson is a graduate research assistant, Xi Xiong, Ph.D. (xiongx@missouri.edu), is an associate pro - fessor of turfgrass science, and Bruce A. Barrett, Ph.D., is a professor of entomology in the Division of Plant Sciences, University of Missouri, Columbia. The RESEARCH SAYS • Both bluegrass and hunting billbug have become pests on zoysiagrass fairways in the upper transition zone in Missouri. • Billbugs are difficult to spot because they spend most of their time below ground. Pitfall traps were set up at two golf courses in Columbia, Mo., to monitor billbug populations. • Billbug population sizes at the two courses were significantly different, but activity of the adults was similar. • Hunting billbugs, the dominant species on zoysiagrass fairways in the area, complete 1.5 to 2 life cycles per year, and therefore may require two insecticide applications where infestations are heavy. Total billbug Hunting billbug Bluegrass billbug 2015 2016 Date Billbug count Figure 6. Count of hunting billbugs and bluegrass billbugs collected from a total of 40 pitfall traps installed on the 17th fairway of Country Club of Missouri, Columbia, Mo., in 2015 and 2016. Billbug count, Country Club of Missouri

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