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USE OF DPX-E2Y45 FOR CONTROL OF BILLBUGS, 2005

USE OF DPX-E2Y45 FOR CONTROL OF BILLBUGS, 2005 (G22) KENTUCKY BLUEGRASS: Poa pratensis L. T. M. Heng-Moss Department of Entomology University of Nebraska-Lincoln 201B Plant Industry Bldg Lincoln, NE 68583-0816 Phone (402) 472-8708 Fax (402) 472-4687 E-mail: THENGMOSS2@unl.edu T. E. Eickhoff M. D. Stamm Bluegrass billbug (BB): Sphenophorous parvulus Gyllenhal Insecticides were evaluated for control of billbugs (BB) on a Kentucky bluegrass research area at the University of Nebraska Agricultural Research and Development Center near Mead, NE. The turf (100% Kentucky bluegrass) was maintained at a height of 2.5 inches. Thatch accumulation (finger compressed) in the plot area was 0.2 inches. Field conditions at the site were: soil type, silty clay loam; soil organic matter, 2-4%; soil pH, 6.2-6.6; water pH, 7.0. Environmental conditions at the time of treatment were as follows: soil moisture 13.9 %, air temperature 64º F, soil temperature 52º F, relative humidity 39%, wind velocity 12 mph. Plots were 5 × 5 ft and the experimental design was a RCB with four replications. Insecticides were applied on 4 May, 2005. Liquid products were applied using a CO sprayer at 40 psi and applying 131 gpa finished spray. Post-treatment irrigation was 0.25 inches. A total of 5.98 inches of rain accumulated during the post-treatment period. Treatments were evaluated 63 days after the first treatment (DAT) (6 Jul) 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 billbug larvae. Data were subjected to ANOVA and means were separated using LSD (P ≤ 0.05). All treatments provided statistically significant reductions of billbug larvae when compared to the untreated control. All rates of DPX-E2Y45 provided excellent billbug control (> 90%). Talstar did not provide acceptable (>80%) billbug control. No phytotoxicity was observed. Treatment/formulation Rate lb(AI)/acre Mean BB/1.05 ft % control DPX E2Y45 SC 0.4 0.0a 100 DPX E2Y45 SC 0.35 0.0a 100 DPX E2Y45 SC 0.3 0.0a 100 DPX E2Y45 SC 0.25 0.0a 100 DPX E2Y45 SC 0.2 0.25a 98 DPX E2Y45 SC 0.1 1.25ab 90 Merit 75WP 0.3 2.25ab 82 Talstar 0.67F 0.1 2.75b 78 Untreated check -- 12.25c -- Means followed by the same letter are not significantly different (LSD, P > 0.05) (LSD = 3.96). http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

USE OF DPX-E2Y45 FOR CONTROL OF BILLBUGS, 2005

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Publisher
Oxford University Press
Copyright
© Published by Oxford University Press.
eISSN
2155-9856
DOI
10.1093/amt/31.1.G22
Publisher site
See Article on Publisher Site

Abstract

(G22) KENTUCKY BLUEGRASS: Poa pratensis L. T. M. Heng-Moss Department of Entomology University of Nebraska-Lincoln 201B Plant Industry Bldg Lincoln, NE 68583-0816 Phone (402) 472-8708 Fax (402) 472-4687 E-mail: THENGMOSS2@unl.edu T. E. Eickhoff M. D. Stamm Bluegrass billbug (BB): Sphenophorous parvulus Gyllenhal Insecticides were evaluated for control of billbugs (BB) on a Kentucky bluegrass research area at the University of Nebraska Agricultural Research and Development Center near Mead, NE. The turf (100% Kentucky bluegrass) was maintained at a height of 2.5 inches. Thatch accumulation (finger compressed) in the plot area was 0.2 inches. Field conditions at the site were: soil type, silty clay loam; soil organic matter, 2-4%; soil pH, 6.2-6.6; water pH, 7.0. Environmental conditions at the time of treatment were as follows: soil moisture 13.9 %, air temperature 64º F, soil temperature 52º F, relative humidity 39%, wind velocity 12 mph. Plots were 5 × 5 ft and the experimental design was a RCB with four replications. Insecticides were applied on 4 May, 2005. Liquid products were applied using a CO sprayer at 40 psi and applying 131 gpa finished spray. Post-treatment irrigation was 0.25 inches. A total of 5.98 inches of rain accumulated during the post-treatment period. Treatments were evaluated 63 days after the first treatment (DAT) (6 Jul) 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 billbug larvae. Data were subjected to ANOVA and means were separated using LSD (P ≤ 0.05). All treatments provided statistically significant reductions of billbug larvae when compared to the untreated control. All rates of DPX-E2Y45 provided excellent billbug control (> 90%). Talstar did not provide acceptable (>80%) billbug control. No phytotoxicity was observed. Treatment/formulation Rate lb(AI)/acre Mean BB/1.05 ft % control DPX E2Y45 SC 0.4 0.0a 100 DPX E2Y45 SC 0.35 0.0a 100 DPX E2Y45 SC 0.3 0.0a 100 DPX E2Y45 SC 0.25 0.0a 100 DPX E2Y45 SC 0.2 0.25a 98 DPX E2Y45 SC 0.1 1.25ab 90 Merit 75WP 0.3 2.25ab 82 Talstar 0.67F 0.1 2.75b 78 Untreated check -- 12.25c -- Means followed by the same letter are not significantly different (LSD, P > 0.05) (LSD = 3.96).

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 2006

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