Full TGIF Record # 68452
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Web URL(s):https://listings.lib.msu.edu/iowat/1988.pdf#page=70
    Last checked: 01/12/2017
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Publication Type:
i
Report
Author(s):Christians, N. E.; Reicher, Z. J.
Author Affiliation:Christians: Professor, and Reicher: Turfgrass Graduate Student and Research Associate
Title:Poa annua control study - 1986-87
Source:1988 Iowa Turfgrass Research Report. 1988, p. 65-66.
Publishing Information:Ames, Iowa: Iowa State University Extension
# of Pages:2
Series:FG-454
Keywords:TIC Keywords: Poa annua; Ethofumesate; Mefluidide; Phytotoxicity
Abstract/Contents:"The objectives of this study were to determine the effectiveness of RSW 0411 70 WP (an experimental material from Mobay Chemical Company), Progass (a labeled Poa annua control for NOR-AM Chemical Company), and Embark (a growth regulating compound from PBI Gordon Inc.) as controls of Poa annua in a creeping bentgrass golf course green and to observe any phytotoxicity of the compounds on creeping bentgrass. The practice green at Veenker Memorial Golf Course in Ames was used as the test site. This green was constructed in 1974 on a Coland clay loam (fineloamy, mixed, mesic, cumulic, Haplaquoll) soil with a pH of 7.7, 19 ppm P, 116 ppm K, and 3.5 percent organic matter. Treatments were applied at the rates and times outlined in an included table in the equivalent of 175 gal water/A. Each plot measured 5 ft by 5 ft and the study was replicated three times. The treated area was not watered for 24 ours following application. The RSW 0411 70WP reduced the quality of creeping bentgrass following the May and September treatments, but not after the July treatment. The damage from the May treatments lasted through July. The damage following the September treatment lasted into the fall, but no damage was observed in the spring of 1987 on plots treated with this material. Poa annua was also discolored by the RSW 0411 70WP; however, it tended to recover more quickly than the creeping bentgrass. Poa annua measurements were taken on April 21, 1987. Measurements were made by randomly throwing a 6 inch by 6 inch grid divided into nine 2-inch divisions on three locations in each plot. The data on percent Poa annua listed in an included table were based on measurements from the grid. No reduction in Poa annua population were observed on any of the plots treated with the RSW 0411 70WP. Embark applied at 0.25 lb ai/A did not discolor either Poa annua or creeping bentgrass and did not reduce Poa annua infestation. Prograss did not discolor either species in the fall. In the spring, this material had reduced the Poa annua population from 59 percent cover in the control to 19 percent in the treated plot. There was no visible damage to the bentgrass in the spring. Germination of Poa annua into Prograss treated plots was observed in late April 1987. The Prograss appears to have potential as a Poa annua control in close mowed creeping bentgrass. More work on application rates and timing of application will be needed before recommendations for the use of this material on greens can be made. Prograss is presently not labeled for use on close mowed bentgrass. There is data from studies at other locations that would indicate a risk of damage to bentgrass with Prograss and caution should be exercised in the use of this material."
Language:English
References:0
Note:"July, 1988"
Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Christians, N. E., and Z. J. Reicher. 1988. Poa annua control study - 1986-87. Iowa Turfgrass Res. Rep. p. 65-66.
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    Last checked: 01/12/2017
    Requires: PDF Reader
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MSU catalog number: SB 433 .A1 I55
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