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PREVENTIVE TIMING STUDY WITH MERIDIAN AND MERIT FORMULATIONS TO SUPPRESS SCARAB WHITE GRUBS, 2007

PREVENTIVE TIMING STUDY WITH MERIDIAN AND MERIT FORMULATIONS TO SUPPRESS SCARAB WHITE GRUBS, 2007 (G13) BLUEGRASS (KENTUCKY): Poa pratensis L FESCUE (FINE): Festuca sp. PREVENTIVE TIMING STUDY WITH MERIDIAN AND MERIT FORMULATIONS TO SUPPRESS SCARAB WHITE GRUBS, 2007 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: dek16@psu.edu A. Houseman E-mail: adh5008@psu.edu Japanese beetle: Popillia japonica Newman Northern masked chafer: Cyclocephala borealis Arrow This study was undertaken to determine product effectiveness when applied at peak adult emergence to control a predominant northern masked chafer (NMC) and Japanese beetle (JB) white grub population on a turfgrass area maintained on a golf course driving range in Mingoville. The turfgrass area consisted of Kentucky bluegrass (10%) and fine fescue (90%). Treatment plots were 6 × 8 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 2 2 boom, operating at 28 psi, and applied in 363 ml of water/48 ft or delivering 2.0 gal/1000 ft . Granular formulations were applied with a hand-held shaker and mixed with fine top dressing sand to facilitate product distribution. At treatment time one (3 Jul) the following soil and environmental conditions existed: air temp, 65°F; soil temp at l inch depth, 61°F; soil temp at 2 inch, 63°F; RH, 53%; amt of thatch, 0.25 inch; water pH, 7.0; application time, mid-morning; soil, dry; thatch, dry; and cloudy skies. General soil conditions were as follows: soil textural class, clay loam; soil particle size analysis: sand, 23.3%; silt, 47.4%; clay, 29.3%; soil percent water content (percent by wt), 15.7; organic matter, 7.2%; CEC, 22.3; and soil pH, 5.9. The experimental area received 0.25 inch post treatment irrigation immediately after treatment. Three one ft soil samples were removed from each replicate on 4 Oct and the total no. JB and NMC grubs was recorded and converted to a three ft count. Data were analyzed with ANOVA and the mean separation test used was WD. The area selected for the experiment had been infested with a natural population of NMC and JB grubs during the spring of 2007 with an avg of 16.6/ft grubs present. Adult NMC’s were monitored in 2007 with a black light trap maintained at the Valentine Turfgrass Research Center. The first adult NMC was collected on 14 Jun. Peak NMC adult flight was recorded from ca. 22 Jun through 9 Jul. Drought conditions negatively impacted the development and survival of scarab grubs at the research site location. Rainfall data recorded over the duration of the experiment included: 21 May – 31 May, 0.75 inch; 1 Jun – 30 Jun, 2.55 inches; 1 Jul – 31 Jul, 2.85 inches; 1 Aug – 31 Aug, 6.25; 1 Sep – 30 Sep, 2.2 inches; and 1 Oct – 16 Oct, zero. All treatments provided significant suppression of JB and NMC grubs. No phytotoxicity was noted. Table 1. Avg no. white grubs/3 ft Treatment/ Rate a ab formulation form/acre JB grubs NMC grubs Meridian 25WG 17.0 oz 0.0b (100%) 0.0b (100%) Meridian 25WG 12.7 oz 0.0b (100%) 0.0b (100%) Meridian 0.33G 80.0 lb 0.0b (100%) 0.0b (100%) Merit 75WP 6.4 oz 0.3b (95.0%) 0.0b (100%) Untreated check --- 6.0a 9.7a Means followed by the same letter are not significantly different (P = 0.05; WD). ( ) Percent reduction. Data transformed to a log transformation prior to ANOVA/WD. Untransformed means are presented in the table. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

PREVENTIVE TIMING STUDY WITH MERIDIAN AND MERIT FORMULATIONS TO SUPPRESS SCARAB WHITE GRUBS, 2007

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Publisher
Oxford University Press
Copyright
© Published by Oxford University Press.
eISSN
2155-9856
DOI
10.1093/amt/33.1.G13
Publisher site
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Abstract

(G13) BLUEGRASS (KENTUCKY): Poa pratensis L FESCUE (FINE): Festuca sp. PREVENTIVE TIMING STUDY WITH MERIDIAN AND MERIT FORMULATIONS TO SUPPRESS SCARAB WHITE GRUBS, 2007 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: dek16@psu.edu A. Houseman E-mail: adh5008@psu.edu Japanese beetle: Popillia japonica Newman Northern masked chafer: Cyclocephala borealis Arrow This study was undertaken to determine product effectiveness when applied at peak adult emergence to control a predominant northern masked chafer (NMC) and Japanese beetle (JB) white grub population on a turfgrass area maintained on a golf course driving range in Mingoville. The turfgrass area consisted of Kentucky bluegrass (10%) and fine fescue (90%). Treatment plots were 6 × 8 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 2 2 boom, operating at 28 psi, and applied in 363 ml of water/48 ft or delivering 2.0 gal/1000 ft . Granular formulations were applied with a hand-held shaker and mixed with fine top dressing sand to facilitate product distribution. At treatment time one (3 Jul) the following soil and environmental conditions existed: air temp, 65°F; soil temp at l inch depth, 61°F; soil temp at 2 inch, 63°F; RH, 53%; amt of thatch, 0.25 inch; water pH, 7.0; application time, mid-morning; soil, dry; thatch, dry; and cloudy skies. General soil conditions were as follows: soil textural class, clay loam; soil particle size analysis: sand, 23.3%; silt, 47.4%; clay, 29.3%; soil percent water content (percent by wt), 15.7; organic matter, 7.2%; CEC, 22.3; and soil pH, 5.9. The experimental area received 0.25 inch post treatment irrigation immediately after treatment. Three one ft soil samples were removed from each replicate on 4 Oct and the total no. JB and NMC grubs was recorded and converted to a three ft count. Data were analyzed with ANOVA and the mean separation test used was WD. The area selected for the experiment had been infested with a natural population of NMC and JB grubs during the spring of 2007 with an avg of 16.6/ft grubs present. Adult NMC’s were monitored in 2007 with a black light trap maintained at the Valentine Turfgrass Research Center. The first adult NMC was collected on 14 Jun. Peak NMC adult flight was recorded from ca. 22 Jun through 9 Jul. Drought conditions negatively impacted the development and survival of scarab grubs at the research site location. Rainfall data recorded over the duration of the experiment included: 21 May – 31 May, 0.75 inch; 1 Jun – 30 Jun, 2.55 inches; 1 Jul – 31 Jul, 2.85 inches; 1 Aug – 31 Aug, 6.25; 1 Sep – 30 Sep, 2.2 inches; and 1 Oct – 16 Oct, zero. All treatments provided significant suppression of JB and NMC grubs. No phytotoxicity was noted. Table 1. Avg no. white grubs/3 ft Treatment/ Rate a ab formulation form/acre JB grubs NMC grubs Meridian 25WG 17.0 oz 0.0b (100%) 0.0b (100%) Meridian 25WG 12.7 oz 0.0b (100%) 0.0b (100%) Meridian 0.33G 80.0 lb 0.0b (100%) 0.0b (100%) Merit 75WP 6.4 oz 0.3b (95.0%) 0.0b (100%) Untreated check --- 6.0a 9.7a Means followed by the same letter are not significantly different (P = 0.05; WD). ( ) Percent reduction. Data transformed to a log transformation prior to ANOVA/WD. Untransformed means are presented in the table.

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 2008

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