Control of Japanese Beetle Larvae on a Golf Course Fairway in Medina County, Ohio, 1993

1994 ◽  
Vol 19 (1) ◽  
pp. 301-302
Author(s):  
K. T. Power ◽  
D. J. Shetlar ◽  
H. D. Niemczyk ◽  
M. G. Belcher

Abstract The study was located on a golf course fairway at Seville, Ohio. Insecticides were applied 1 Sep to plots 8 × 10 ft (2.4 × 3.1 m) arranged in a randomized complete block, replicated 4 times. Liquids were applied using a CO2 sprayer with Teejet XR8006VS nozzles at 35 psi (2.46 kg/cm2) pressure that delivered a volume of 1 gal/1000 ft2 (407 liter/ha). The experimental area was irrigated approximately V> in (6 mm) after all treatments were applied but before sprays had dried on the grass blades. Environmental conditions at time of treatment were as follows. JB: ca. 215/m2, 60% 2nd and 40% 3rd instars. Turf: slight slope <5° dew, 1 in (2.5 cm) height, 65% Bentgrass, 30% annual bluegrass, 5% other grasses. Thatch: dense, moist, 5/s in (1.6 cm) Soil: moist, 73°F at 1 in (2.5 cm) and 72°F at 3 in (7.6 cm). Weather: cloudy and light rain, 74°F, 0 mph. Water: pH 5.1. Efficacy data taken 5 Oct (35 DAT) were based on the number of live JB larvae in six 7 × 7 in (17.8 × 17.8 cm) square samples from each plot.

1995 ◽  
Vol 20 (1) ◽  
pp. 273-274
Author(s):  
K. T. Power ◽  
D. J. Shetlar ◽  
H. D. Niemczyk ◽  
M. G. Belcher

Abstract The study was located on golf course fairway at Seville. Insecticides were applied 23 Jul to plots 10 × 10 ft (3.1 × 3.1 m) arranged in a RCB, replicated 4 times. Granular materials were applied using a drop spreader and shaker jar. Liquid treatments were applied with a CO2 sprayer with Teejet XR8008VS nozzles at 35 psi (2.46 kg/cm2) pressure that delivered a volume of 1 gal/1000 ft2 (407 liter/ha) and pythrethriods with a CO2 sprayer with Teejet 8010 nozzles at 35 psi (2.46 kg/cm2) pressure that delivered a volume of 2 gal/1000 ft2 (814 liter/ha). The experimental area was irrigated approximately V* inch (6 mm) of water using the golf course system. Environmental conditions at time of treatment were as follows. BTA: eggs, 1st and 2nd instars present, 60 larvae/ ft2. Turf: level, dry, 5A inch (16 mm) height, 70% bentgrass and 30% annual bluegrass. Thatch: dense, moist, % inch (2 cm). Soil, moist, 74°F at 1 inch (2.5 cm) and 72°F at 3 inch (7.6 cm). Weather: sunny, 81°F, 0 mph. Water: pH 4.6. Efficacy data taken 7 Jul (14 DAT) were based on the number of live larvae in six samples 4% inch (10.8 cm) in diam from each plot.


1994 ◽  
Vol 19 (1) ◽  
pp. 323-323
Author(s):  
K. T. Power ◽  
D. J. Shetlar ◽  
H. D. Niemczyk ◽  
M. G. Belcher

Abstract The study was located on a golf course fairway at Jeromesville. Insecticides were applied 16 Jun to plots 8 × 10 ft arranged in a RCB, replicated 4 times. Granular insecticides were applied using a drop spreader and liquids using a CO2 sprayer with Teejet XR8006VS nozzles at 35 psi pressure that delivered a volume of 1 gal/1000 ft2. The experimental area was irrigated approximately V* inch after all treatments were applied but before sprays had dried on the grass blades. Environmental conditions at time of treatment were as follows. BTA: eggs and 1st instars present, no pretreatment count. Turf: level, light dew, IVs inch height, 40% perennial ryegrass, 30% Kentucky bluegrass, 30% annual bluegrass. Thatch: dense, moist, % inch. Soil: moist, 66°F at 1 inch and 67°F at 3 inch. Weather: sunny, 65°F, 0-5 mph. Water: pH 6.5. Efficacy data taken 6 Jul (20 DAT) were based on the number of live BTA larvae and pupae in 6, 4Vt inch in diam samples from each plot. No phytotoxicity was observed.


1996 ◽  
Vol 21 (1) ◽  
pp. 323-323
Author(s):  
K. T. Power ◽  
D. J. Shetlar ◽  
H. D. Niemczyk ◽  
M. Belcher

Abstract The study was located on a golf course rough at Valley View Golf Course in Akron, Ohio. Insecticides were applied 3 May to plots 5 X 10 ft (1.5 X 3.1 m) arranged in a RCB, replicated 3 times. Liquid treatments were applied with a CO2 sprayer and TeeJet™ XR8010VS nozzles at 30 psi (2.19 kg/cm2) pressure that delivered a volume of 3.1 gal/1000 ft2 (1262 liter/ha). The granular treatment was applied with a drop spreader. After all treatments were applied, the area was irrigated with approximately ½inch (13 mm) of water using the golf course system. Environmental conditions at the time of treatment were as follows: White grubs: approximately 15/ft2, 60% NMC 3rd instars, 40% JB 3rd instars; Turf: level, dry, 1.0-2.0 inch (2.5-5.0 cm) ht, 50% bentgrass, 30% annual bluegrass, and 20% Kentucky Bluegrass, no thatch; Soil: moist, 50°F at 1 inch (2.5 cm) and 3 inch (7.6 cm); Weather: sunny, 47°F, no wind. Efficacy data taken 30 May (28 DAT) were based on the number of live larvae in four samples 7X7 inch (17.8 X 17.8 cm) from each plot. Analysis of variance was done on plot totals transformed to log (X+l) and means separated by LSD test at P = 0.05.


1994 ◽  
Vol 19 (1) ◽  
pp. 324-324
Author(s):  
K. T. Power ◽  
D. J. Shetlar ◽  
H. D. Niemczyk ◽  
M. G. Belcher

Abstract The study was located lawns of the Agricultural Technical Institute at Wooster, Ohio. Insecticides were applied 15 Jun to plots 10 x 10 ft arranged in a randomized complete block, replicated 4 times. Granular insecticides were applied using a drop spreader and liquids using a CO2 sprayer with Teejet 8010LP nozzles at 30 psi that delivered a volume of 3 gal/1000 ft2. The experimental area received no posttreatment irrigation. Environmental conditions at time of treatment were as follows. Billbugs: early instars present, no pretreatment count. Turf: 3° slope, dry, 3 in height, 50% Kentucky bluegrass, 50% perennial ryegrass. Thatch: moist, Vi inch, dense. Soil: moist, 68°F at 1 inch and 55°F at 3 inches. Weather: sunny, 73°F, 5-8 mph. Water: pH 4.9. Billbug efficacy data taken from each plot 9 Jul (28 DAT) were based on the number of live billbug larvae and pupae in 6, AVi inches in diam samples from each plot. Efficacy data for control of a subsequent JB and NMC larval population (appx 70% JB: 30% NMC) taken 5 & 7 Oct was based on the number of live grubs in 6, 7 × 7 in samples from each plot.


1996 ◽  
Vol 21 (1) ◽  
pp. 350-350
Author(s):  
K. T. Power ◽  
D. J. Shetlar ◽  
H. D. Niemczyk ◽  
M. Belcher

Abstract The study was located on a golf course fairway at Twin Lakes Golf in Mansfield, Ohio. Insecticides were applied 14 Aug to plots 10 X 10 ft (3.1 X 3.1 m) arranged in a RCB replicated 4 times. Granular materials were applied with a shaker jar. Liquid treatments were applied using a CO2 sprayer and Teejer™ XR8006VS nozzles at 25 psi (1.76 kg/cm2) pressure that delivered a volume of 1 gal/1000 ft2 (407 liter/ha). The area received approximately Vi ½ inch (13 mm) posttreatment irrigation with the golf course irrigation system after the sprays had dried on the grass blades. Environmental conditions at treatment date were as follows: Japanese beetles: first instar larvae present; Turf: mostly level, dry, 1 l¼ inch (3.2 cm) ht, 50% Kentucky bluegrass, 50% annual bluegrass, no thatch; Soil: moist, 72°F at 1 inch (2.5 cm) and 76°F at 3 inch (7.6 cm); Weather: sunny, 78°F, 0-5 mph (0-8 kph) wind. Efficacy data taken 26 Sep (43 DAT) were based on the number of live larvae in six samples 7X7 inch (17.8 X 17.8 cm) from each plot. Analysis of variance was done on the log (X+l) of plot totals and means separated by LSD test at P = 0.05.


1995 ◽  
Vol 20 (1) ◽  
pp. 281-281
Author(s):  
P. R. Heller ◽  
R. Walker

Abstract The fairway consisted primarily of annual bluegrass (40%), Kentucky bluegrass (40%), and perennial ryegrass (20%). Treatment plots were 9 × 6 ft, arranged in a RCB design, replicated 3 times. Liquid formulations were applied with a CO2 compressed air sprayer with 4 8004VS TeeJet nozzles mounted on a 6 ft boom, operating at 28 psi, and delivering 5 gal/1000 ft2. At treatment time (26 Jul) the following soil and environmental conditions existed: air temperature, 72°F; soil temperature at 1 inch depth, 76CF; soil temperature at 2 inch, 74°F; RH, 85%; amount of thatch, 0.25-0.50 inches; soil type, loam; soil particle size analysis: 31.1% sand, 46.4% silt, 22.5% clay; organic matter, 6.7%; soil moisture (oven baked) 23.1%; water pH, 6-7; soil pH, 4.4; and partly cloudy skies. Immediately after treatment the experimental area was irrigated with 0.25 inches of water. Posttreatment counts were made 42 DAT (6 Sep). Three ft2 sod samples were randomly taken from each replicate, and the total number of Japanese beetle grubs ft2 was recorded.


1994 ◽  
Vol 19 (1) ◽  
pp. 312-312
Author(s):  
P. R. Heller ◽  
R. Walker

Abstract The turfgrass area consisted primarily of annual bluegrass (50%) and creeping bentgrass (50%). Treatment plots were 9 × 6 ft, arranged in a RCB design and replicated 3 times. Granular formulations were applied with a hand-held shaker and mixed with a fine grade top-dressing sand to facilitate product distribution. Liquid formulations were applied with a CO2 compressed air sprayer with 4 8004VS TeeJet nozzles mounted on a 6 ft boom, operating at 28 psi, and delivering 5 gal/1000 ft2. At treatment time (23 Aug) the following soil and environmental conditions existed: air temperature, 66°F; soil temperature at 1 inch depth, 70°F; soil temperature at 2 inch, 69°F; RH, 85%; amount of thatch, 0.125 inches; soil type, loam; soil particle size analysis: 37.0% sand, 45.0% silt, 18.0% clay; organic matter, 5.0%; soil moisture (oven baked), 31.6; water pH, 7.0; soil pH, 5.1; and overcast skies. Immediately after treatment the experimental area was irrigated with 0.5 inches of water. Posttreatment counts were made 49 DAT (11 Oct). Japanese beetle grub control was evaluated by removing four 0.087 ft2 sod samples from each replicate, and the total number of grubs were recorded and converted to a ft2 count. Sod samples were removed with a 4 inch diam cup cutter.


1996 ◽  
Vol 21 (1) ◽  
pp. 353-353
Author(s):  
Joseph E. Weaver

Abstract Treatments were applied 27 Jul to plots 8 X 8 ft arranged in a RCBD, replicated 4 times. Granular materials were applied with a shaker jar. Liquid treatments were applied in 1 liter of water per plot with a sprinkling can. The plot area was irrigated after the last treatment had been applied with about ¼inch water using the golf course system. Water pH to apply was 6.85; to irrigate, about 8.0. Environmental conditions at start (8:30 am) and finish (9:35 am) of treatment applications were, respectively: air temperature, 23° C and 31.5° C; RH, 84% and 60%; overcast (fog) and clear (calm); soil temperatures (surface) 26° C and 32° C, (1 inch) 25.5° C and 29.5° C; soil moist from regular irrigation; soil type, loam; soil particle analysis, 40.7% sand, 46.6% silt, 12.7% clay; organic matter, 11.7%, pH 5.35; CEC, 23.81 meg/100 g; 1/3 bar, 31.29%. Thatch thickness ranged from 0.24 to 0.38 inches for 28 samples over plot area. Grub population was 100% Japanese beetle (pre- and post-treatment); avg no. grubs at treatment was 34.5/ft2 (59.4% mid to late 1st instar, 40.6% early 2nd instar). Efficacy was evaluated at 53 DAT using a cup changer to extract 4 plugs near the center of each plot to a depth of 2-3 inches and counting live larvae in each sample. The no. larvae for the 4 plugs from each plot was averaged to produce a mean for each replicate for statistical analysis.


1996 ◽  
Vol 21 (1) ◽  
pp. 331-331
Author(s):  
Joseph E. Weaver ◽  
James C. Farren

Abstract Merit 75W and Tempo 20W were compared as side by side treatments on whole greens with ½ half of a green being a replicate of each treatment. Treatments were applied 23 May, replicated 4 times; there was no untreated control. Compounds were applied with a Cushman Turfmaster 125 sprayer and watered in with the same sprayer at 120 gal/acre. Water pH was 8.33. Environmental conditions at start (8:35 am) and finish (11:30 am) of treatment applications were, respectively: air temperature, 23.5°C and 32.5°C; RH, 43% and 54%; sky clear; soil temperature (surface), 25.5°C and 33.5°C, (1 inch) 25.5°C and 29°C; soil very moist. Efficacy was evaluated on 31 Jul (69 DAT) by treating entire greens with Tempo 2 at the rate of 0.04 lb (AI)/acre, syringing the green 8-10 min and counting the no. of cutworms flushed to the surface in a sample area of 4 m2. Two areas were sampled on each treated half of each green. Within these sample areas, the no. of obvious cutworm feeding holes were also counted.


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