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Web URL(s):http://archive.lib.msu.edu/tic/mitgc/article/1989123.pdf
    Last checked: 02/27/2009
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Publication Type:
i
Proceedings
Author(s):Melvin, Brad; Vargas, Joe Jr.; Berndt, Lee; Detweiler, Ron
Author Affiliation:Botany and Plant Pathology, Michigan State University
Title:Effect of bioorganic turf amendments on microbe populations, necrotic ring spot and thatch
Meeting Info.:East Lansing, MI: January 16-18, 1989
Source:Proceedings of the 59th Annual Michigan Turfgrass Conference. Vol. 18, 1989, p. 123-130.
Publishing Information:East Lansing, MI: Michigan State University
# of Pages:8
Keywords:TIC Keywords: Bio-organic amendments; Poa pratensis; Necrotic ring spot; Thatch control; Organic fertilizers
Abstract/Contents:Bioorganic turf amendments were examined for their influence on microbe populations, management of Necrotic Ring Spot (Leptosphaeria korrae) and thatch control in each of three different irrigation regimes. A turfstand of five year old Kentucky bluegrass was inoculated on 5/6/86 with L. korrae. At present the stand is severely diseased. Treatments were applied to muck sod in a randomized complete block design. The turf amendments Biogroundskeeper, Greenspeed, Nitroform, Sustane, Turf Restore and urea were applied to 6'x 6' plots in each of nine irrigation blocks. Three turf blocks received 0.1"/day irrigation, three received an 80% evapo-pan irrigation twice per week, and three blocks were not irrigated (rain only). Treatment applications began on 5/15/86 with various frequencies. After each application all plots were irrigated for 15 minutes. The area was mowed to 2.5" twice per week and received infrequent foot traffic. Disease incidence was evaluated on 9/28/88 by counting the number of active ring spots in each plot. Thatch was measured by removal, washing, drying, dessicating, and weighing of sod plugs. Microbe counts on soil and thatch were determined using the plate count method. Inoculum was prepared by dilution of a soil sample in saline solution. One ml of solute was added to selective agar to detect bacteria, fungi, or actinomycetes. After the plates were incubated, microbe colonies were counted. When each soil sample was taken for the plate count experiment, the percent moisture of soil and thatch for each irrigation block was determined. Moisture in daily irrigated block > 80% pan irrigated block > nonirrigated (rain only) block. Daily irrigation stimulated total bacteria populations by maintaining high soil and thatch moisture. All the bioorganic treatments were able to stimulate bacteria populations, as compared to the untreated control, in the daily and 80% pan irrigation regimes. Those test plots which averaged higher average bacteria demonstrated reduced necrotic ring spot disease incidence and reduced thatch.
Language:English
References:0
See Also:Other items relating to: BIOTHATCH
Note:Graphs
Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Melvin, B., J. Jr. Vargas, L. Berndt, and R. Detweiler. 1989. Effect of bioorganic turf amendments on microbe populations, necrotic ring spot and thatch. p. 123-130. In Proceedings of the 59th Annual Michigan Turfgrass Conference. East Lansing, MI: January 16-18, 1989. East Lansing, MI: Michigan State University.
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http://archive.lib.msu.edu/tic/mitgc/article/1989123.pdf
    Last checked: 02/27/2009
    Requires: PDF Reader
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