Full TGIF Record # 120077
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Publication Type:
i
Professional
Content Type:Q & A
Corporate Author(s):USGA Green Section
Title:Control of turf weeds
Section:Our letter box
Other records with the "Our letter box" Section
Source:Turf Culture [II]. Vol. 2, No. 3, March 1941, p. 191-192.
# of Pages:2
Publishing Information:Washington, DC: United States Golf Association, Green Section
Question:The two weeds, samples of which are enclosed, infest our bluegrass turf in patches. I have been successful other years in getting rid of them by handweeding and reseeding. This method, however, is rather expensive. If there is a better and cheaper way to rid our turf of these weeds, I should appreciate having your recommendations.
Source of Question:Illinois
Keywords:TIC Keywords: Application methods; Arsenic acid; Cerastium glomeratum; Control methods; Cost efficiency; Recommendations; Sodium arsenite; Veronica peregrina; Weed control
Answer/Response:The weeds you sent were the larger mouse-ear chickweed (Cerastium vulgatum) and purslane speedwell (Veronica peregrina). Both are easily killed by treatments with sodium arsenite or arsenic acid, as described in the December, 1939, issue of TURF CULTURE. You can use either the spray method or the dry method. If the patches are scattered you may find the dry method best. In that case apply the chemical at the rate of about 3/4 pound to 1,000 square feet. If you use the spray method apply only 3 to 4 ounces to 1,000 square feet. You will, of course, not be applying it solidly over 1,000 square feet, so you will have to make some tests to determine the amount of water or sand to use in which to mix the arsenicals. One of the simplest ways to determine this is to mark off an area of 100 square feet. If a knapsack sprayer is to be used, put 2 gallons of water in the spayer and spray the 100 square feet so as to thoroughly wet the foliage without causing any noticeable run-off. Then measure the amount of water left in the sprayer. By subtracting this from the original amount you have the quantity of water necessary to spray 100 square feet with your particular spray nozzles and at the covering you are using. Multiply this quantity by 10 and use the resulting amount of water in which to dissolve the 3 or 4 ounces of sodium arsenite. If the foliage is weeted with this solution approximately the same as was that in the test plot of 100 square feet, the arsenical will be applied at the recommended rate. A similar test with sand on an area of 100 square feet will determine for you how much sand is needed to give a fairly even distribution. You do not need a great deal of sand but you want enough to scatter it pretty well over the patch of weeds. The patches will be brown but can be reseeded immediately after treatment. If you find the burn on the turf is a little excessive simply cut down on the amount of arsenical that you use. If you use the spray method, get the white sodium arsenite because it dissolves more readily than does the gray. If you plan to apply it in the sand the gray sodium arsenite may be used equally as effectively as the white.
Language:English
References:0
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
USGA Green Section. 1941. Control of turf weeds. Turf Culture [II]. 2(3):p. 191-192.
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http://gsrpdf.lib.msu.edu/ticpdf.py?file=/1940s/1941/4103188.pdf#page=4
    Last checked: 01/24/2017
    Requires: PDF Reader
    Notes: Item is within a single large file
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MSU catalog number: SB 433.25 .C66
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