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CURATIVE SUPPRESSION OF WHITE GRUBS WITH APPLICATIONS OF INSECTICIDE FORMULATIONS, 2002

CURATIVE SUPPRESSION OF WHITE GRUBS WITH APPLICATIONS OF INSECTICIDE FORMULATIONS, 2002 (G32) RYEGRASS (PERENNIAL): Lolium perenne L. CURATIVE SUPPRESSION OF WHITE GRUBS WITH APPLICATIONS OF INSECTICIDE FORMULATIONS, 2002 Paul R. Heller Pennsylvania State University University Park, PA 16802 Tel: 814-865-3008 Fax: 814-865-3048 prh@psu.edu R. Walker rgw7@psu.edu Northern masked chafer (NMC): Cyclocephala borealis (Arrow) Japanese beetle (JB): Popillia japonica (Newman) This experiment was conducted on turfgrass maintained at Penn State's Valentine Turfgrass Research Center which was infested with a natural population of white grubs to determine the effectiveness of formulations applied at different intervals. The turfgrass area consisted primarily of Kentucky bluegrass (100%). Treatment plots were 9 x 6 ft, arranged in a RCB block design and replicated three times. Granular formulations were applied with a hand-held shaker and mixed with fine top dressing sand to facilitate product distribution. At treatment time one (17 Sep) the following soil and environmental conditions existed: air temp, 57°F; soil temp at l inch depth, 61°F; soil temp at 2 inch, 62°F; RH, 70%; amt of thatch, 0.125-0.25 inch; percent water content (percent by wt), 24.8; soil textural class, silt loam; soil particle size analysis: 17.0% sand, 71.3% silt, 11.7% clay; organic matter, 3.5%; CEC, 10.1; and soil pH, 6.4; soil moist; thatch moist; water pH, 7.0; application time, early morning; and clear skies. Immediately after application treatments were irrigated in with 0.3 inch of water. Second and third instar Northern masked chafer (NMC) grubs were present in the soil on 17 Sep. The experimental area was irrigated on a regular basis following treatment. Three square foot sod samples were randomly taken from each replicate on 22 Oct, and the total no. of scarab white grubs/ft was recorded according to species. Data were analyzed using WD. The experimental area was previously infested in the spring of 2002 with populations of NMC and a few Japanese beetle (JB) grubs. Pre-treatment counts recorded on 5 Sep averaged 23.0 s and third instar NMC grubs/ft . JB grubs populations were minimal. The predominant white grub species present was NMC and six treatments provided significant reduction of NMC grubs. Pyrethroid treatments were least effective. The first adult NMC was collected on 24 Jun 2002. Peak NMC adult flight was recorded from 24 Jun through 15 Jul. The last NMC adult was collected on 31 Jul. No treatments provided significant reduction of JB grubs. No phytotoxicity was noted. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

CURATIVE SUPPRESSION OF WHITE GRUBS WITH APPLICATIONS OF INSECTICIDE FORMULATIONS, 2002

Arthropod Management Tests , Volume 28 (1) – Jan 1, 2003

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Publisher
Oxford University Press
Copyright
© Published by Oxford University Press.
eISSN
2155-9856
DOI
10.1093/amt/28.1.G32
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Abstract

(G32) RYEGRASS (PERENNIAL): Lolium perenne L. CURATIVE SUPPRESSION OF WHITE GRUBS WITH APPLICATIONS OF INSECTICIDE FORMULATIONS, 2002 Paul R. Heller Pennsylvania State University University Park, PA 16802 Tel: 814-865-3008 Fax: 814-865-3048 prh@psu.edu R. Walker rgw7@psu.edu Northern masked chafer (NMC): Cyclocephala borealis (Arrow) Japanese beetle (JB): Popillia japonica (Newman) This experiment was conducted on turfgrass maintained at Penn State's Valentine Turfgrass Research Center which was infested with a natural population of white grubs to determine the effectiveness of formulations applied at different intervals. The turfgrass area consisted primarily of Kentucky bluegrass (100%). Treatment plots were 9 x 6 ft, arranged in a RCB block design and replicated three times. Granular formulations were applied with a hand-held shaker and mixed with fine top dressing sand to facilitate product distribution. At treatment time one (17 Sep) the following soil and environmental conditions existed: air temp, 57°F; soil temp at l inch depth, 61°F; soil temp at 2 inch, 62°F; RH, 70%; amt of thatch, 0.125-0.25 inch; percent water content (percent by wt), 24.8; soil textural class, silt loam; soil particle size analysis: 17.0% sand, 71.3% silt, 11.7% clay; organic matter, 3.5%; CEC, 10.1; and soil pH, 6.4; soil moist; thatch moist; water pH, 7.0; application time, early morning; and clear skies. Immediately after application treatments were irrigated in with 0.3 inch of water. Second and third instar Northern masked chafer (NMC) grubs were present in the soil on 17 Sep. The experimental area was irrigated on a regular basis following treatment. Three square foot sod samples were randomly taken from each replicate on 22 Oct, and the total no. of scarab white grubs/ft was recorded according to species. Data were analyzed using WD. The experimental area was previously infested in the spring of 2002 with populations of NMC and a few Japanese beetle (JB) grubs. Pre-treatment counts recorded on 5 Sep averaged 23.0 s and third instar NMC grubs/ft . JB grubs populations were minimal. The predominant white grub species present was NMC and six treatments provided significant reduction of NMC grubs. Pyrethroid treatments were least effective. The first adult NMC was collected on 24 Jun 2002. Peak NMC adult flight was recorded from 24 Jun through 15 Jul. The last NMC adult was collected on 31 Jul. No treatments provided significant reduction of JB grubs. No phytotoxicity was noted.

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 2003

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