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| Web URL(s): | https://gsrpdf.lib.msu.edu/?file=/1930s/1932/3212228.pdf
Last checked: 01/25/2017
Requires: PDF Reader |
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| Publication Type:
| Professional |
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| Content Type: | Q & A |
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| Corporate Author(s): | USGA Green Section |
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| Title: | Economy in the use of known chemicals in place of proprietary fungicides in brownpatch control |
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| Section: | Questions and answers
Other records with the "Questions and answers" Section
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| Source: | The Bulletin of the United States Golf Association Green Section. Vol. 12, No. 6, December 1932, p. 228-229. |
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| Publishing Information: | Washington, DC: USGA Green Section |
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| # of Pages: | 2 |
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| Question: | "We are having quite a bit of trouble here in southern Texas from brownpatch in the winter grass on our Bermuda greens. Practically every golf course of importance here has planted its Bermuda greens with redtop and bluegrass. We have had no trouble in San Antonio with bluegrass but have had quite a bit of trouble with redtop. We have been spraying our greens every ten days with * * *, a proprietary brownpatch remedy, but find this rather expensive. Is there any preventive we could use as a spray or a topdressing which would keep our winter grass healty and yet not be so expensive as this proprietary preparation?" |
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| Source of Question: | Texas |
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| Answer/Response: | "You can control brownpatch much more economically by using corrosive sublimate than by using the preparation you mention. There is a little more danger of burning grass with corrosive sublimate than with that preparation, but since the pure chemical is so much more effective it should be used in smaller quantities. We have found that 2 ounces of corrosive sublimate contain approximately the same amount of mercury as 1 pound of the preparation referred to. The control of brownpatch is determined by the mercury content of the fungicide employed. Therefore, in cases where you have found 1 pound of the fungicide you have been using effective, we would advise you to try 2 ounces of corrosive sublimate. This can be applied best when mixed thoroughly with a pail or two of slightly moist soil. The soil makes it possible to distribute the chemical more evenly; but it is essential that the corrosive sublimate be mixed very throughly with this soil for obtaining an even distribution. As soon as the chemical is applied it should be watered in with a light sprinkling, care being taken not to use an excessive amount of water since that would tend to wash the chemical down into the low areas on the green. In addition to its mercury content the preparation you have been using contains a fertilizer rich in nitrogen. One pound of this preparation contains nitrogen equivalent to approximately 1 pound of sulphate of ammonia. Therefore, if your greens are in need of nitrogen they will get a stimulation from the application of the material you have used which they will not get from an application of corrosive sublimate alone. This form of nitrogen, however, can be bought much more economically in the form of sulphate of ammonia or some other regular fertilizer. Many of those who use combinations of fungicides and fertilizers get the impression that they are getting control of brownpatch when, as a matter of fact, all they are getting is a stimulation of growth by the application of nitrogen. We therefore feel that it is necessary to warn users of such combinations to try fertilizers in addition to fungicides in order to determine whether or not the benefit from the use of the preparation is due merely to its stimulating the growth of the grass." |
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| Keywords: | TIC Keywords: Control methods; Cynodon dactylon; Disease control; Golf green maintenance; Inorganic mercury; Recommendations; Rhizoctonia blight; Temporary greens
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| Language: | English |
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| References: | 0 |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
USGA Green Section. 1932. Economy in the use of known chemicals in place of proprietary fungicides in brownpatch control. Bull. U.S. Golf Assoc. Green Sec. 12(6):p. 228-229. |
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| Web URL(s):
https://gsrpdf.lib.msu.edu/?file=/1930s/1932/3212228.pdf
Last checked: 01/25/2017
Requires: PDF Reader |
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MSU catalog number: SB 433.15 .B85 |
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