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Web URL(s): | https://listings.lib.msu.edu/iowat/1991.pdf#page=45 Last checked: 01/10/2017 Requires: PDF Reader |
Publication Type:
| Report |
Author(s): | Christians, N. E.;
Moore, R. W. |
Author Affiliation: | Professor, Turfgrass Science, Research and Teaching, Horticulture Department; Research Assistant, Horticulture Department, University of Iowa |
Title: | Fairway height bentgrass response to Fenoxaprop |
Source: | 1991 Iowa Turfgrass Research Report. July 1991, p. 40-42. |
Publishing Information: | Ames, Iowa: Iowa State University |
Keywords: | TIC Keywords: Mowing height; Fenoxaprop-ethyl; Agrostis; Postemergence herbicides
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Abstract/Contents: | "Fenoxaprop (Acclaim) is a postemergence herbicide used for the control of crabgrass in Kentucky bluegrass lawns and other turf areas. Its use on bentgrass is currently not recommended because of concerns over phytotoxicity. Bentgrass cultivars are known to vary in response to herbicides and if there are bentgrasses that can tolerate fenoxaprop, this information would be of use to golf course superintendents. The objective of this study was to observe the response of 15 creeping bentgrass cultivars and one colonial bentgrass cultivar maintained at fairway height (0.5 in) to fenoxaprop at 0.032 and 0.064 lb ai/a. The two-year old stand of creeping bentgrass is located at the Iowa State University Horticulture Research Station on Section 4 of the turfgrass research area. The soil is a Nicolett (fine-loamy, mixed-mesic, Aquic Hapludoll) with a pH of 6.8, 2.3% organic matter and 208 lb K/a. The area received 3 lb N/1000 ft2 in 1990 in the form of urea. It was mowed at 0.5 in twice weekly during the season. The bentgrass variety trial on which this study was conducted was replicated four times. The fenoxaprop treatments were stripped across the replications. Treatment strips were randomized within replications. Fenoxaprop treatments were made during the late afternoon of June 20, 1990. The area was not watered for 24 hours following treatment. On June 22, 1 in of rain was recorded. Another 1.5 in fell on June 24, and 1 in was recorded on June 28. The area was not under moisture stress during the study. The first signs of phytotoxicity were observed on June 25, five days after treatment (Tables 18 & 19). 'Southshore', 'Penncross', and 'SR 1020' were the most tolerant cultivars and were not rated as unsatisfactory at any time following treatment at the 0.064 lb ai/a rate of fenoxaprop. 'Cobra', 'ISI 123', 'Emerald', 'Prominent', 'Carmen', and 'National' were most damaged by the fenoxaprop treatment. Nearly all of the damaged turf had recovered by July 9. The results of this study indicate that bentgrass cultivar can play an important role in how fairway height bentgrass will respond to fenoxaprop treatments. 'Penncross', 'Penneagle', and 'Pennlinks', all cultivars that are commonly used in the midwest, showed only minor damage at the 0.032 lb ai/a level of fenoxaprop. Penncross appeared to be the best cultivar at 0.064 lb ai/a rate." |
Language: | English |
References: | 0 |
Note: | Entire article appears as abstract Tables |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Christians, N. E., and R. W. Moore. 1991. Fairway height bentgrass response to Fenoxaprop. Iowa Turfgrass Res. Rep. p. 40-42. |
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| Web URL(s): https://listings.lib.msu.edu/iowat/1991.pdf#page=45 Last checked: 01/10/2017 Requires: PDF Reader |
| MSU catalog number: SB 433 .A1 I55 |
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