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PREVENTIVE APPLICATIONS OF DPXE2Y45, ARENA, SCIMITAR, AND TALSTAR TO SUPPRESS FIRST GENERATION ANNUAL BLUEGRASS WEEVIL, 2006

PREVENTIVE APPLICATIONS OF DPXE2Y45, ARENA, SCIMITAR, AND TALSTAR TO SUPPRESS FIRST GENERATION... (G8) BLUEGRASS (ANNUAL): Poa annua L RYEGRASS (PERENNIAL): Lolium perenne L. PREVENTIVE APPLICATIONS OF DPXE2Y45, ARENA, SCIMITAR, AND TALSTAR TO SUPPRESS FIRST GENERATION ANNUAL BLUEGRASS WEEVIL, 2006 P.R. Heller Department of Entomology Pennsylvania State University University Park, PA 16802 Phone: 814-865-3008 Fax: 814-865-3048 E-mail: prh@psu.edu D. Kline E-mail: dek15@psu.edu Annual bluegrass weevil: Listronotus maculicollis (Dietz) This study was undertaken to determine the effectiveness of one experimental and three registered insecticides to suppress first generation annual bluegrass weevil (ABW) on a private golf course fairway adjacent to the rough in Bedford County The turfgrass area consisted of annual bluegrass (70%) and perennial ryegrass (30%). Treatment plots were 6 x 4 ft arranged in a RCB design and replicated three times with a 1 ft barrier around all replicates. Liquid formulations were applied by using a CO sprayer with four 8002VS TeeJet nozzles mounted on a 6 ft boom, operating at 28 psi, and applied 2 2 in 182 ml of water/24 ft or delivering 2.0 gal/1000 ft . At treatment time (9 May) the following soil and environmental conditions existed: air temp, 61°F; soil temp at l inch depth, 51°F; soil temp at 2 inch depth, 48°F; RH, 30%; amt of thatch, 0.75 inch; water pH, 7.0; application time, late morning; soil, moist; thatch, wet; and clear sunny skies. Immediately after application the experimental area was irrigated in with 0.1 inch of water. General soil conditions were as follows: soil textural class, loam; soil particle size analysis: sand, 38.0%; silt, 43.7 %; clay, 18.3%; soil percent water content (percent by wt), 23.9; organic matter, 6.1%; CEC, 14.7; and soil pH, 5.6. Two, 4 inch cup cutter sod samples were removed from each replicate on 8 Jun. The total no. of ABW pupae and larvae was recorded and converted to ft . Data were analyzed with ANOVA and the mean separation test used was the WD. The area selected for the experiment had been infested with a natural population of ABW during 2005 and 2006. Various larval instars were present. The breakdown of ABW larval life stages removed from all untreated checks follows: 26.83% second instars, 26.83 third instars, and 46.34% fourth and fifth instars. The three higher rates of DPX E2Y45 1.67SC, Scimitar GC, and Talstar F provided significant suppression of ABW. Arena did not provide significant suppression of ABW at the high or low rate. No phytotoxicity was noted. Avg no. life stages/ft Treatment/ Rate a b formulation lb (AI)/acre ABW (% reduction) DPXE2Y45 1.67SC 0.104 28.7bc (63.5) DPXE2Y45 1.67SC 0.157 9.6c (87.8) DPXE2Y45 1.67SC 0.209 7.7c (90.2) DPXE2Y45 1.67SC 0.26 5.7c (92.7) Talstar F 0.1 0.0c (100.0) Arena 50WDG 0.2 59.4ab (24.4) Arena 50WDG 0.4 92.0a (0.0) Scimitar GC 0.06875 1.9c (97.6) Untreated check --- 78.6ab Means followed by the same letter are not significantly different (P = 0.05; WD). Raw data transformed to a square root transformation prior to ANOVA/WD. Untransformed means are presented in the table. ( ) Percent reduction. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

PREVENTIVE APPLICATIONS OF DPXE2Y45, ARENA, SCIMITAR, AND TALSTAR TO SUPPRESS FIRST GENERATION ANNUAL BLUEGRASS WEEVIL, 2006

Arthropod Management Tests , Volume 32 (1) – Jan 1, 2007

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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/32.1.G8
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Abstract

(G8) BLUEGRASS (ANNUAL): Poa annua L RYEGRASS (PERENNIAL): Lolium perenne L. PREVENTIVE APPLICATIONS OF DPXE2Y45, ARENA, SCIMITAR, AND TALSTAR TO SUPPRESS FIRST GENERATION ANNUAL BLUEGRASS WEEVIL, 2006 P.R. Heller Department of Entomology Pennsylvania State University University Park, PA 16802 Phone: 814-865-3008 Fax: 814-865-3048 E-mail: prh@psu.edu D. Kline E-mail: dek15@psu.edu Annual bluegrass weevil: Listronotus maculicollis (Dietz) This study was undertaken to determine the effectiveness of one experimental and three registered insecticides to suppress first generation annual bluegrass weevil (ABW) on a private golf course fairway adjacent to the rough in Bedford County The turfgrass area consisted of annual bluegrass (70%) and perennial ryegrass (30%). Treatment plots were 6 x 4 ft arranged in a RCB design and replicated three times with a 1 ft barrier around all replicates. Liquid formulations were applied by using a CO sprayer with four 8002VS TeeJet nozzles mounted on a 6 ft boom, operating at 28 psi, and applied 2 2 in 182 ml of water/24 ft or delivering 2.0 gal/1000 ft . At treatment time (9 May) the following soil and environmental conditions existed: air temp, 61°F; soil temp at l inch depth, 51°F; soil temp at 2 inch depth, 48°F; RH, 30%; amt of thatch, 0.75 inch; water pH, 7.0; application time, late morning; soil, moist; thatch, wet; and clear sunny skies. Immediately after application the experimental area was irrigated in with 0.1 inch of water. General soil conditions were as follows: soil textural class, loam; soil particle size analysis: sand, 38.0%; silt, 43.7 %; clay, 18.3%; soil percent water content (percent by wt), 23.9; organic matter, 6.1%; CEC, 14.7; and soil pH, 5.6. Two, 4 inch cup cutter sod samples were removed from each replicate on 8 Jun. The total no. of ABW pupae and larvae was recorded and converted to ft . Data were analyzed with ANOVA and the mean separation test used was the WD. The area selected for the experiment had been infested with a natural population of ABW during 2005 and 2006. Various larval instars were present. The breakdown of ABW larval life stages removed from all untreated checks follows: 26.83% second instars, 26.83 third instars, and 46.34% fourth and fifth instars. The three higher rates of DPX E2Y45 1.67SC, Scimitar GC, and Talstar F provided significant suppression of ABW. Arena did not provide significant suppression of ABW at the high or low rate. No phytotoxicity was noted. Avg no. life stages/ft Treatment/ Rate a b formulation lb (AI)/acre ABW (% reduction) DPXE2Y45 1.67SC 0.104 28.7bc (63.5) DPXE2Y45 1.67SC 0.157 9.6c (87.8) DPXE2Y45 1.67SC 0.209 7.7c (90.2) DPXE2Y45 1.67SC 0.26 5.7c (92.7) Talstar F 0.1 0.0c (100.0) Arena 50WDG 0.2 59.4ab (24.4) Arena 50WDG 0.4 92.0a (0.0) Scimitar GC 0.06875 1.9c (97.6) Untreated check --- 78.6ab Means followed by the same letter are not significantly different (P = 0.05; WD). Raw data transformed to a square root transformation prior to ANOVA/WD. Untransformed means are presented in the table. ( ) Percent reduction.

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 2007

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