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CHROMOBACTERIUM SUBTSUGAE (MBI-203) FOR CONTROL OF SOUTHERN MASKED CHAFERS, 2011

CHROMOBACTERIUM SUBTSUGAE (MBI-203) FOR CONTROL OF SOUTHERN MASKED CHAFERS, 2011 Arthropod Management Tests 2012, Vol. 37 doi: 10.4182/amt.2012.G9 (G9) BLUEGRASS (KENTUCKY): Poa pratensis L. RYEGRASS (PERENNIAL): Lolium perenne L. M. D. Stamm Department of Entomology University of Nebraska-Lincoln 103 Entomology Hall Lincoln, NE 68583-0816 Phone: (402) 472-8702 Fax (402) 472-4687 Email: mstamm3@unl.edu R. W. Baxendale Department of Biology Metropolitan State College of Denver Campus Box 53 PO Box 173362 Denver, CO 80217 Phone: (303) 352-4261 Fax: (303) 556-6426 E-mail: baxendal@mscd.edu K. G. Koch Department of Entomology University of Nebraska-Lincoln 103 Entomology Hall Lincoln, NE 68583-0816 Phone: (402) 472-8702 Fax (402) 472-4687 Phone: (402) 472-8683 E-mail: kylegkoch@gmail.com T. J. Prochaska Phone: (402) 472-8683 E-mail: travis.prochaska@huskers.unl.edu Southern masked chafer (SMC): Cyclocephala lurida Bland Insecticides were evaluated for control of white grubs on a Kentucky bluegrass/perennial ryegrass fairway at the North Bend Golf Course in North Bend, Nebraska. The turf was maintained at 2.5 inches ht. Treatments were applied on 18 May 2011 to 5 ft by 5 ft sprayer at 40 psi and applying 174 gpa plots arranged in RCB design with 5 replications. Liquid products were applied using a CO finished spray. Within 24 h following application, all treatments were irrigated with 0.25 in of water. Formulations were evaluated 24 DAT by removing from each plot three, 8-inch diam turf-soil cores (1.05 ft² total area) to a depth of 3 inches and counting the number of surviving and moribund grubs. Plots were periodically assessed for phytotoxicity. Environmental conditions at the time of treatment were as follows: soil moisture 12.8%; air temp 84ºF; soil temp 79ºF; relative humidity 72%; wind velocity 10 mph. Significant differences in numbers of chafers were not detected among treatments during the evaluation (P=0.05), and no treatments provided acceptable (>80%) curative control of white grubs. Regardless, there appears to be a correlation between application rate and percent control for the MBI-203 DF1 treatments. All treatments, except MBI-203 DF1 (2 fl oz/100 ft ), outperformed Dylox 420 SL (6.9 fl oz/1000 ft ), an industry standard insecticide for white grub control. Interestingly, moribund white grubs were found in all treatments of MBI-203 AF1 and MBI-203 DF1. These individuals were not used in the statistical analysis rather included for comparative purposes. No phytotoxicity was observed. This research was supported by industry gifts of products and research funding. 1 Arthropod Management Tests 2012, Vol. 37 doi: 10.4182/amt.2012.G9 Table 1. Mean SMC % Treatment Rate 1.05 ft Control MBI-203 AF1 16 2.4 ± 0.9 76.0 MBI-203 DF1 8 3.8 ± 1.1 62.0 MBI-203 AF1 8 4.8 ± 1.6 52.0 MBI-203 AF1 32 5.0 ± 1.5 50.0 MBI-203 DF1 4 5.0 ± 3.2 50.0 Dylox 420 SL 6.9 5.6 ±1.7 44.0 MBI-203 DF1 2 6.6 ± 1.2 34.0 UTC --- 10.0 ± 1.3 --- http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

CHROMOBACTERIUM SUBTSUGAE (MBI-203) FOR CONTROL OF SOUTHERN MASKED CHAFERS, 2011

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Arthropod Management Tests 2012, Vol. 37 doi: 10.4182/amt.2012.G9 (G9) BLUEGRASS (KENTUCKY): Poa pratensis L. RYEGRASS (PERENNIAL): Lolium perenne L. M. D. Stamm Department of Entomology University of Nebraska-Lincoln 103 Entomology Hall Lincoln, NE 68583-0816 Phone: (402) 472-8702 Fax (402) 472-4687 Email: mstamm3@unl.edu R. W. Baxendale Department of Biology Metropolitan State College of Denver Campus Box 53 PO Box 173362 Denver, CO 80217 Phone: (303) 352-4261 Fax: (303) 556-6426 E-mail: baxendal@mscd.edu K. G. Koch Department of Entomology University of Nebraska-Lincoln 103 Entomology Hall Lincoln, NE 68583-0816 Phone: (402) 472-8702 Fax (402) 472-4687 Phone: (402) 472-8683 E-mail: kylegkoch@gmail.com T. J. Prochaska Phone: (402) 472-8683 E-mail: travis.prochaska@huskers.unl.edu Southern masked chafer (SMC): Cyclocephala lurida Bland Insecticides were evaluated for control of white grubs on a Kentucky bluegrass/perennial ryegrass fairway at the North Bend Golf Course in North Bend, Nebraska. The turf was maintained at 2.5 inches ht. Treatments were applied on 18 May 2011 to 5 ft by 5 ft sprayer at 40 psi and applying 174 gpa plots arranged in RCB design with 5 replications. Liquid products were applied using a CO finished spray. Within 24 h following application, all treatments were irrigated with 0.25 in of water. Formulations were evaluated 24 DAT by removing from each plot three, 8-inch diam turf-soil cores (1.05 ft² total area) to a depth of 3 inches and counting the number of surviving and moribund grubs. Plots were periodically assessed for phytotoxicity. Environmental conditions at the time of treatment were as follows: soil moisture 12.8%; air temp 84ºF; soil temp 79ºF; relative humidity 72%; wind velocity 10 mph. Significant differences in numbers of chafers were not detected among treatments during the evaluation (P=0.05), and no treatments provided acceptable (>80%) curative control of white grubs. Regardless, there appears to be a correlation between application rate and percent control for the MBI-203 DF1 treatments. All treatments, except MBI-203 DF1 (2 fl oz/100 ft ), outperformed Dylox 420 SL (6.9 fl oz/1000 ft ), an industry standard insecticide for white grub control. Interestingly, moribund white grubs were found in all treatments of MBI-203 AF1 and MBI-203 DF1. These individuals were not used in the statistical analysis rather included for comparative purposes. No phytotoxicity was observed. This research was supported by industry gifts of products and research funding. 1 Arthropod Management Tests 2012, Vol. 37 doi: 10.4182/amt.2012.G9 Table 1. Mean SMC % Treatment Rate 1.05 ft Control MBI-203 AF1 16 2.4 ± 0.9 76.0 MBI-203 DF1 8 3.8 ± 1.1 62.0 MBI-203 AF1 8 4.8 ± 1.6 52.0 MBI-203 AF1 32 5.0 ± 1.5 50.0 MBI-203 DF1 4 5.0 ± 3.2 50.0 Dylox 420 SL 6.9 5.6 ±1.7 44.0 MBI-203 DF1 2 6.6 ± 1.2 34.0 UTC --- 10.0 ± 1.3 ---

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Arthropod Management Tests – Oxford University Press

Published: Jan 1, 2012

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