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PREVENTIVE AND CURATIVE CONTROL OF BLUEGRASS BILLBUGIN LAWN TURF, 2003

PREVENTIVE AND CURATIVE CONTROL OF BLUEGRASS BILLBUGIN LAWN TURF, 2003 Arthropod Management Tests 2012, Vol. 37 doi: 10.4182/amt.2012.G6 (G6) BLUEGRASS (KENTUCKY): Poa pratensis L. David J. Shetlar Department of Entomology The Ohio State University 2501 Carmack Rd. Columbus, OH 43210 Phone: (614) 292-3762 Fax: (614) 292-9783 Email: shetlar.1@osu.edu Jennifer Andon Email: andon.1@osu.edu Bluegrass billbug (BB): Sphenophorus parvulus Gyllenhal This study evaluated efficacy of new insecticides for preventive and curative control of BB compared to that of industry standards. The test plots were located at the OSU Ohio Turfgrass Foundation Turfgrass Research and Education Facility, Zone 3, east side, Columbus, Ohio. Treatments were applied 16 May (preventive) and 6 Jun (curative) to plots 6 ft × 6 ft arranged with replicates separated by 1 ft, in a RCB design replicated four times. Granules were applied with shaker jars. Liquid treatments were applied using a 3 ft wide CO - pressurized sprayer with TeeJet 8004 nozzles at 20 PSI calibrated to deliver 1.5 gal/1000 ft . No post treatment irrigation was applied, but rain occurred within 48 h of application. Field conditions at time of 16 May applications were: turf – 95% Kentucky bluegrass, 5% weedy grasses, mowed at 3.5 inch, thatch-0.25-0.5 inch; soil – clay loam, very moist, slight slope to south, 60°F at 1 inch, 52°F at 3 inches; weather – air temp74°F, overcast, 0-3 mph wind from southeast; pests – generally infested in 2002 and adult BB present in plot. Field conditions at time of 6 Jun were: turf – same as above; soil – clay loam, very moist, 59°F at 1 inch, 58°F at 3 inches; weather – air temp 70°F, clear, calm; pests – small BB larvae present. Efficacy data were obtained 17 Jul (61 or 41 DAT) by counting the number of live BB larvae, pupae and adults in each of four 4.25-inch turf/soil cores taken from each plot in a biased manner (the cores were removed from spots where BB frass was found in stems). ANOVA was preformed on untransformed totals per plot and means separated by LSD at á= 0.05. All insecticide treatments provided significant control thought the MACH2 level of control was inadequate for industry standards. Untreated checks had 39.8 billbug larvae/pupae/adults per ft , which is considered to be a high population. No phytotoxicity was observed after any of the treatments. This research was supported by industry gifts of research funding. Avg No.BB/3 cores/plot Treatment/ Rate Appl. 2a Formulation lb(AI)/acre date Avg/ft % control Merit 0.2 G 0.25 16 May 11.8bc 70 MACH2 1.5G 2.0 16 May 19.5b 51 Meridian 0.2G 0.20 16 May 6.8c 83 Meridian 0.2G 0.30 16 May 4.2c 89 Meridian 0.2G 0.40 16 May 1.7c 96 Merit 75 WP 0.30 6 Jun 3.4c 91 Merit 75 WP 0.40 6 Jun 0.0c 100 Check --- --- 39.8a --- Combined billbug larvae+pupae+adults untransformed counts analyzed by ANOVA (P=0.001), and means followed by the same letter in a column are not significantly different by LSD at = 0.05. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

PREVENTIVE AND CURATIVE CONTROL OF BLUEGRASS BILLBUGIN LAWN TURF, 2003

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Oxford University Press
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© Published by Oxford University Press.
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10.4182/amt.2012.G6
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Abstract

Arthropod Management Tests 2012, Vol. 37 doi: 10.4182/amt.2012.G6 (G6) BLUEGRASS (KENTUCKY): Poa pratensis L. David J. Shetlar Department of Entomology The Ohio State University 2501 Carmack Rd. Columbus, OH 43210 Phone: (614) 292-3762 Fax: (614) 292-9783 Email: shetlar.1@osu.edu Jennifer Andon Email: andon.1@osu.edu Bluegrass billbug (BB): Sphenophorus parvulus Gyllenhal This study evaluated efficacy of new insecticides for preventive and curative control of BB compared to that of industry standards. The test plots were located at the OSU Ohio Turfgrass Foundation Turfgrass Research and Education Facility, Zone 3, east side, Columbus, Ohio. Treatments were applied 16 May (preventive) and 6 Jun (curative) to plots 6 ft × 6 ft arranged with replicates separated by 1 ft, in a RCB design replicated four times. Granules were applied with shaker jars. Liquid treatments were applied using a 3 ft wide CO - pressurized sprayer with TeeJet 8004 nozzles at 20 PSI calibrated to deliver 1.5 gal/1000 ft . No post treatment irrigation was applied, but rain occurred within 48 h of application. Field conditions at time of 16 May applications were: turf – 95% Kentucky bluegrass, 5% weedy grasses, mowed at 3.5 inch, thatch-0.25-0.5 inch; soil – clay loam, very moist, slight slope to south, 60°F at 1 inch, 52°F at 3 inches; weather – air temp74°F, overcast, 0-3 mph wind from southeast; pests – generally infested in 2002 and adult BB present in plot. Field conditions at time of 6 Jun were: turf – same as above; soil – clay loam, very moist, 59°F at 1 inch, 58°F at 3 inches; weather – air temp 70°F, clear, calm; pests – small BB larvae present. Efficacy data were obtained 17 Jul (61 or 41 DAT) by counting the number of live BB larvae, pupae and adults in each of four 4.25-inch turf/soil cores taken from each plot in a biased manner (the cores were removed from spots where BB frass was found in stems). ANOVA was preformed on untransformed totals per plot and means separated by LSD at á= 0.05. All insecticide treatments provided significant control thought the MACH2 level of control was inadequate for industry standards. Untreated checks had 39.8 billbug larvae/pupae/adults per ft , which is considered to be a high population. No phytotoxicity was observed after any of the treatments. This research was supported by industry gifts of research funding. Avg No.BB/3 cores/plot Treatment/ Rate Appl. 2a Formulation lb(AI)/acre date Avg/ft % control Merit 0.2 G 0.25 16 May 11.8bc 70 MACH2 1.5G 2.0 16 May 19.5b 51 Meridian 0.2G 0.20 16 May 6.8c 83 Meridian 0.2G 0.30 16 May 4.2c 89 Meridian 0.2G 0.40 16 May 1.7c 96 Merit 75 WP 0.30 6 Jun 3.4c 91 Merit 75 WP 0.40 6 Jun 0.0c 100 Check --- --- 39.8a --- Combined billbug larvae+pupae+adults untransformed counts analyzed by ANOVA (P=0.001), and means followed by the same letter in a column are not significantly different by LSD at = 0.05.

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 2012

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