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USE OF PROVAUNT FOR CONTROL OF WHITE GRUBS, 2004

USE OF PROVAUNT FOR CONTROL OF WHITE GRUBS, 2004 (G8) BLUEGRASS (KENTUCKY): Poa Pratensis L. T.E. Eickhoff Department of Entomology University of Nebraska-Lincoln 202 Plant Industry Bldg. P.O. Box 830816 Lincoln, NE 68583-0816 Phone: (402) 472-8702 Fax: (402) 472-4687 E-mail: teickhof@unlserve.edu F.P. Baxendale Phone: (402) 472-8699 E-mail: fbaxendale1@unl.edu T.M. Heng-Moss Phone: (402) 472-8708 E-mail: THENGMOSS2@unl.edu Southern masked chafer (SMC): Cyclocephala lurida Bland Insecticides were evaluated for control of SMC grubs on plots located at the University of Nebraska Agricultural Research and Development Center near Mead, NE. The turf (100% Kentucky bluegrass) was maintained at a ht of 2.5 inches. Thatch accumulation (finger compressed) in the plot area was 0.25 inch. Field conditions at the study site were: soil type, silty-clay loam; soil organic matter, 3-5%; soil pH, 6-7; water pH, 7.0. Environmental conditions at the time of treatment were as follows: soil moisture 24%; air temp 79°F; soil temp 77°F; relative humidity 72%; wind direction and velocity 137° at 9.0 mph. Plots were 5 x 5 ft and the experimental design was a RCB with four replications. Insecticide treatments were applied on 1 Jul 2004. Insecticides were applied using a CO sprayer at 40 psi and applying 131 gpa finished spray. Post-treatment irrigation was 0.25 inch. A total of 5.4 inches of rain accumulated during the post-treatment period. Treatments were evaluated 75 (14 Sep) DAT by removing from each plot three, 8-inch diameter turf-soil cores (1.05 ft² total area) to a depth of 3 inches and counting the number of surviving white grubs. Data were analyzed using ANOVA and means were separated with LSD (P ≤ 0.05). All treatments provided statistically significant reductions of SMC grubs when compared to the untreated check. However, Provaunt + Induce, Provaunt + PBO-8 + SCOIL, Provaunt + PBO-8 + Silwet and Provaunt + SCOIL treatments did not provide acceptable (>80%) SMC control. No phytotoxicity was observed. Treatment/ Rate Mean SMC formulation lb (AI)/acre grubs/1.05 ft % control Merit 75WP 0.3 0.0a 100 Provaunt 14.5% 0.44 1.0ab 91 + PBO-8 8EC + 1.0% v/v + Induce + 0.5% v/v Provaunt 14.5% 0.44 1.0ab 90 Provaunt 14.5% 0.44 1.5ab 85 + Silwet L-77 + 0.5% v/v Provaunt 14.5% 0.44 1.8ab 83 + PBO-8 8EC + 0.25% v/v Provaunt 14.5% 0.44 2.3ab 78 + Induce + 1.0% v/v Provaunt 14.5% 0.44 2.3ab 78 + PBO-8 8EC + 1.0% v/v + SCOIL + 1.0% v/v Provaunt 14.5% 0.44 2.8ab 73 + PBO-8 8EC + 1.0% v/v + Silwet L-77 + 0.25% v/v Provaunt 14.5% 0.44 4.3b 59 + SCOIL + 1.0% v/v Untreated check --- 10.3c --- Means followed by the same letter are not significantly different (P > 0.05, LSD test). http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

USE OF PROVAUNT FOR CONTROL OF WHITE GRUBS, 2004

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Oxford University Press
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© Published by Oxford University Press.
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2155-9856
DOI
10.1093/amt/30.1.G8
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Abstract

(G8) BLUEGRASS (KENTUCKY): Poa Pratensis L. T.E. Eickhoff Department of Entomology University of Nebraska-Lincoln 202 Plant Industry Bldg. P.O. Box 830816 Lincoln, NE 68583-0816 Phone: (402) 472-8702 Fax: (402) 472-4687 E-mail: teickhof@unlserve.edu F.P. Baxendale Phone: (402) 472-8699 E-mail: fbaxendale1@unl.edu T.M. Heng-Moss Phone: (402) 472-8708 E-mail: THENGMOSS2@unl.edu Southern masked chafer (SMC): Cyclocephala lurida Bland Insecticides were evaluated for control of SMC grubs on plots located at the University of Nebraska Agricultural Research and Development Center near Mead, NE. The turf (100% Kentucky bluegrass) was maintained at a ht of 2.5 inches. Thatch accumulation (finger compressed) in the plot area was 0.25 inch. Field conditions at the study site were: soil type, silty-clay loam; soil organic matter, 3-5%; soil pH, 6-7; water pH, 7.0. Environmental conditions at the time of treatment were as follows: soil moisture 24%; air temp 79°F; soil temp 77°F; relative humidity 72%; wind direction and velocity 137° at 9.0 mph. Plots were 5 x 5 ft and the experimental design was a RCB with four replications. Insecticide treatments were applied on 1 Jul 2004. Insecticides were applied using a CO sprayer at 40 psi and applying 131 gpa finished spray. Post-treatment irrigation was 0.25 inch. A total of 5.4 inches of rain accumulated during the post-treatment period. Treatments were evaluated 75 (14 Sep) DAT by removing from each plot three, 8-inch diameter turf-soil cores (1.05 ft² total area) to a depth of 3 inches and counting the number of surviving white grubs. Data were analyzed using ANOVA and means were separated with LSD (P ≤ 0.05). All treatments provided statistically significant reductions of SMC grubs when compared to the untreated check. However, Provaunt + Induce, Provaunt + PBO-8 + SCOIL, Provaunt + PBO-8 + Silwet and Provaunt + SCOIL treatments did not provide acceptable (>80%) SMC control. No phytotoxicity was observed. Treatment/ Rate Mean SMC formulation lb (AI)/acre grubs/1.05 ft % control Merit 75WP 0.3 0.0a 100 Provaunt 14.5% 0.44 1.0ab 91 + PBO-8 8EC + 1.0% v/v + Induce + 0.5% v/v Provaunt 14.5% 0.44 1.0ab 90 Provaunt 14.5% 0.44 1.5ab 85 + Silwet L-77 + 0.5% v/v Provaunt 14.5% 0.44 1.8ab 83 + PBO-8 8EC + 0.25% v/v Provaunt 14.5% 0.44 2.3ab 78 + Induce + 1.0% v/v Provaunt 14.5% 0.44 2.3ab 78 + PBO-8 8EC + 1.0% v/v + SCOIL + 1.0% v/v Provaunt 14.5% 0.44 2.8ab 73 + PBO-8 8EC + 1.0% v/v + Silwet L-77 + 0.25% v/v Provaunt 14.5% 0.44 4.3b 59 + SCOIL + 1.0% v/v Untreated check --- 10.3c --- Means followed by the same letter are not significantly different (P > 0.05, LSD test).

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 2005

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