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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 several turf insecticides against European chafer larvae, home lawn, 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. 366. |
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| Publishing Information: | Annapolis, MD: Entomological Society of America |
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| # of Pages: | 1 |
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| Abstract/Contents: | "Six turf insecticides were tested for efficacy against European chafer larvae on a home lawn in Waltham, Mass. Grub populations were ca. 60% eggs, 40% early first instar at the time of application. The lawn consisted of 30% perennial ryegrass, 30% annual bluegrass, 30% crabgrass, and 10% dandelion, and was mowed at ca. 1.5 inches. Treatment plots were 8 ft by 8 ft, replicated 5 times, arranged in a RCB. All applications were made between 11:00 AM and 12:30 PM on 1 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. 85°F, sunny and moderately humid with light SW wind (5-10 mph); soil type, silty loam; soil pH 6.6; water pH, 8.2. All plots were hand watered with 0.1 inch immediately after application, and an additional 0.2 inch was applied through overhead irrigation within 2 hr after application. No measurable rain fell in the area for 2 wk after application. Product efficacy was evaluated on 17 Oct (77 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. Merit, Oftanol, Proxol, and Turcam all reduced grub populations significantly relative to the untreated control, regardless of formulation. The pyrethroids (Talstar and Tempo) did not reduce grub poopulations significantly, confirming previous observations that pyrethroids applied conventionally (on the surface) do not appear to be efficacious against white grubs. The trial site was under extreme agronomic stress, receiving only 0.4 inches rainfall between 20 June and 20 Aug. Supplemental irrigation was applied weekly beginning in late July to prevent the lawn from reaching the wilting point, but nearly 30% of the area went dormant or died even with irrigation. Grub populations (10 larvae/ft²) were higher than expected given the low soil moisture conditions." |
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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 several turf insecticides against European chafer larvae, home lawn, 1995. Arthropod Manage. Tests. 21:p. 366. |
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