Full TGIF Record # 34041
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Publication Type:
i
Report
Author(s):Vittum, P. J.
Author Affiliation:Department of Entomology, Fernald Hall, University of Massachusetts, Amherst, MA 01003
Title:Effect of date of application on efficacy of Turcam and Dylox against annual bluegrass weevils, golf course fairway, 1993
Source:Arthropod Management Tests. Vol. 19, 1994, p. 315-316.
Publishing Information:Annapolis, MD: Entomological Society of America
# of Pages:2
Keywords:TIC Keywords: Poa annua; Agrostis stolonifera; Listronotus maculicollis; Insect control; Insecticide evaluation; Application timing; Bendiocarb; Trichlorfon
Abstract/Contents:"Bendiocarb (Turcam 76 WP and Turcam 2.5G) and trichlorfon (Dylox 80SP and Dylox 6.2G) were applied on 28 Apr (Forsythia in full bloom) or 10 May (Cornus florida in full bloom) or on both dates (Turcam only) to 2 x 2 m plots, which were replicated 5 times and arranged in a CRD. The plots were established on a golf course fairway in Scarborough, NY-annual bluegrass 60%, creeping bentgrass 40%), maintained at 1.3 cm. All treatments were applied by hand. Granular formulations were applied using glass jars with perforated lids. Liquid formulations were applied with watering cans, using 2 liters water per plot. All applications were made by applying ca. half of the material in one direction and then applying the remainder in the perpendicular direction. The entire test area received 0.4-0.6 cm irrigation within 1 h after application on each date. Soil pH was 6.3, water pH of water used for applications was 6.0 on 28 Apr, 6.2 on 10 May. Product efficacy was evaluated on 14 Jun by removing 12 soil cores (5.7 cm diam, 4 cm deep) per plot and inspecting the cores under magnification in the Amherst laboratory. Insect counts were made by combining totals from 3 plugs per recorded observation (4 observations per plot, 20 observations per treatment). At the time of sampling, the population was 12% 3rd instar, 21% 4th instar, 47% 5th instar, and 21% pupae. None of the treatments was significantly different from the untreated control and none of the treatments provided acceptable levels of control (70 to 80%). Population pressure was quite high (111 weevils per 0.1 m2), but none of the treatments reduced the populations below the currently accepted threshold (30 to 50 weevils per 0.1 m2). The efficacy of Turcam in field trials conducted in previous years has been inconsistent, at least when it is directed toward ovipositing females. Dylox might be more effective later in the life cycle, when larvae are already present, but does not appear to be a suitable choice for control of ovipositing females."
Language:English
References:0
Note:Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Vittum, P. J. 1994. Effect of date of application on efficacy of Turcam and Dylox against annual bluegrass weevils, golf course fairway, 1993. Arthropod Manage. Tests. 19:p. 315-316.
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