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| Publication Type:
| Report |
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| Author(s): | Vittum, P. J. |
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| Author Affiliation: | Department of Entomology, University of Massachusetts |
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| Title: | Efficacy of three formulations of RH-0345 against Japanese beetle larvae, golf course rough, 1995 |
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| Section: | Ornamentals
Other records with the "Ornamentals" Section
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| Source: | Arthropod Management Tests. Vol. 21, 1996, p. 364-365. |
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| Publishing Information: | Annapolis, MD: Entomological Society of America |
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| # of Pages: | 2 |
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| Abstract/Contents: | "Three formulations of RH0345 (2F, 2.5G, and 5G) were tested for efficacy against Japanese beetle larvae on a golf course fairway in Stockbridge, Mass. The fairway consisted of 40% perennial ryegrass, 30% Kentucky bluegrass, 25% annual bluegrass, and was mowed at ca. 2.0 inches. Pre-treatment samples revealed ca. 20 grubs/ft², 20% eggs, 45% first instars, 35% second instars. Treatment plots were 8 ft by 8 ft, replicated 5 times, arranged in a RCB. All applications were made between 9:30 and 11:00 AM on 28 Aug 95. Liquid formulations were applied by hand with a watering can, 3 liters per plot. Granular formulations were applied using glass jars with perforated lids. Conditions at the time of application were as follows: air temp. 75°F, light scattered clouds, steady NE wind at 10 to 15 mph; soil type, silty loam; soil pH 6.6; water pH, 7.1; thatch 0.4 inch thick with moderate density. There had been 0.25 inch rain 24 hr before application, but that had been the first measurable rain in 8 wk, so there was considerable drought stress evident. All plots ere hand watered with 0.1 inch water immediately after application. No measurable rain fell in the area for 2 wk after application. Product efficacy was evaluated on 5 Oct (38 DAT) by removing 5 cupcutter plugs (4.25 inch diam) from near the center of each plot, dislodging soil with a hand trowel, and counting all grubs to a depth of 3 inches. There was no significant difference between comparable rates of any of the formulations. All of the treatments reduced grub populations significantly relative to the untreated control except the high rate of the 2.5 G formulation, but several of the treatments failed to reduce grub populations below 10 grubs/ft², which is a commonly accepted tolerance level for Japanese beetle grubs in turf in New England. However, these applications were made later than the ideal treatment date (RH0345 should be targeted toward first instars shortly after they eclose). Severely dry conditions before and after application may have affected penetration of the material through the thatch." |
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| Language: | English |
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| References: | 0 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Vittum, P. J. 1996. Efficacy of three formulations of RH-0345 against Japanese beetle larvae, golf course rough, 1995. Arthropod Manage. Tests. 21:p. 364-365. |
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MSU catalog number: SB 951 .A1 I48 |
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