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| Publication Type:
| Report |
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| Author(s): | Nechols, J. R. |
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| Author Affiliation: | Dept. of Entomology, Kansas State University, Waters Hall, Manhattan, KS. |
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| Title: | Control of Southern Masked Chafer Larvae in Tall Fescue Turf, 1986. |
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| Source: | Insecticide and Acaricide Tests. Vol. 13, 1988, p. 356-357. |
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| Publishing Information: | Lanham, MD:Entomological Society of America |
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| Keywords: | TIC Keywords: Festuca arundinacea; Cyclocephala lurida; Control; Insecticides; Ethoprophos; Isofenphos; Diazinon; Flat-fan nozzles
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| Abstract/Contents: | "Several commercial-use granular insecticides were tested for efficacy against first-instar southern masked chafer (SMC) larvae in an irrigated 4-yr-old stand of 'K-31' tall fescue located at the Rocky Ford Turfgrass Research Plots at Kansas State University, Manhattan, Kans. A check was made for phytotoxicity. The predominant soil type, Chase silt loam, had a relatively high fertility and was composed of 3% organic matter. The range of acidity at the experimental site was pH 7.2-7.3 and the mowing height was 3.5 inches. the experiment was conducted on a 5- X 5-ft plot in a completely randomized block design and included 5 replicates of each of 4 treatments. Each replicate consisted of a turf core, cut and placed inside a 6-inch-diam polyvinyl chloride cylinder, and then resituated in the turf plot. On 24 and 25 Jul, first-instar SMC larvae were collected from an adjacent tall fescue plot, placed immediately into shaded buckets containing moist peat moss, and then inoculated into premoistened turf cores. Individual larvae were placed head down into each of 10 0.5-inch holes/core and then covered with soil. Weather conditions during grub inoculations were as follows: 25-27C; 55-75% RH; slight breeze; partly cloudy to sunny skies. No rainfall occurred, but the soil was moist because of irrigation. On 29 Jul, granular applications were made to each cylinder by hand shaking required amounts of each chemical from a cup to achieve an even distribution. Check replicates received inert granules only by the same procedure. All replicates were watered in a a rate of 0.5 inches (175ml) immediately following treatment. Environmental conditions during application were as follows: 25C; 85-88% RH; clear to slightly hazy skies; no detectable wind. The pretreated soil was highly moist from the previous day's irrigation. No rainfall occurred for 24 h posttreatment. Four of the 5 treatment and check replicates were evaluated for larval mortality on 20 Aug, 21 DAT, by removing the turf cores from the cylinders and counting the number of living larvae. the size of each surviving grub was noted. One randomly selected replicate was left intact until 10 Sep (43 DAT) so that treatment and check cores could be evaluated for insect-related damage. The results showed that treatment with Oftanol 5G, Mocap 5G, and Mocap 10G resulted in significantly lower grub survival at 22 DAT than did the Diazinon 5G treatment or the check. Most of the grubs reovered were in the third instar; a few were second instars. No phytotoxicity was noted in any of the turf cores; however, rainfall and temperature during the study were above and below average, respectively." |
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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):
Nechols, J. R. 1988. Control of Southern Masked Chafer Larvae in Tall Fescue Turf, 1986.. Arthropod Manage. Tests. 13:p. 356-357. |
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MSU catalog number: SB 951 .A1 I48 |
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