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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Baxendale, F. P.;
Weinhold, A. P.;
Von Bargen, K.;
Grisso, R. D.;
Vittum, P. J. |
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| Author Affiliation: | University of Nebraska-Lincoln: Department of Entomology, Biological Systems Engineering and Department of Entomology, University of Massachusetts-Amherst, Ma |
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| Title: | Control of southern masked chafer grubs with rates of Dursban using subsurface and conventional broadcast applications, 1991 |
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| Source: | Insecticide and Acaricide Tests. Vol. 18, 1993, p. 318-319. |
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| Publishing Information: | Lanham, MD: Entomological Society of America |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Cyclocephala lurida; Poa pratensis; Chlorpyrifos; Broadcast treatment
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| Geographic Terms: | Nebraska |
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| Abstract/Contents: | "This study was conducted on a Kentucky bluegrass golf course rough in Lincoln, NE. Plots were 1.1 X 4.6 m and the experimental design was a RCB with 4 replications. The turf was maintained at a mowing height of 7.6 cm and thatch accumulation (finger compressed) in the plot area was 1.3 to 2.5 cm. Field conditions at the the study site were: soil type, silty clay loam; soil organic matter, 3-5%; soil pH, 6.7; water pH, 7.0; soil moisture, 10%. Insecticide treatments were applied on 19 Aug using a newly developed Cushman prototype subsurface applicator to place insecticides at the soil/thatch interface (average depth 1.9 cm). Granular material was applied using a Grandy 24 H 12 drop spreader and liquids were applied using a CO2 backpack sprayer with LF-4 nozzle at 165 kPa and 18.9 liter/93m2. Immediately following application, plots were irrigated with 1.3 cm of water. An additional 5.7 cm of irrigated water was applied and 2.1 cm of rain fell during the post-treatment period. Treatments were evaluated 21 DAT (9 Sep) by removing from each plot six, 20.3 cm diam turf-soil cores (0.19 m2 total area) to a depth of 7.6 cm and counting the number of surviving grubs. White grub infestation levels in the test area were high (60.9/.09 m2) and injury to the turf was substantial at the time of application. Pretreatment counts indicated 5% first, 35% second, and 60% third instar SMC/0.09 sqared. All insecticide treatments provided statistically significant reductions in white grub numbers. Subsurface applications of both granular and liquid Dursban formulations resulted in greater white grub control than conventional broadcast applications, even when applied at the 0.45 kg (50%) rate. In some plots, the prototype subsurface applicator caused considerable injury to the turf when the sod was cut in strips and lifted from the soil. No phytotoxicity was observed." |
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| Language: | English |
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| References: | 0 |
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| Note: | Table
This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Baxendale, F. P., A. P. Weinhold, K. Von Bargen, R. D. Grisso, and P. J. Vittum. 1993. Control of southern masked chafer grubs with rates of Dursban using subsurface and conventional broadcast applications, 1991. Arthropod Manage. Tests. 18:p. 318-319. |
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